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3184; CANNON ROAD WEST; FINAL REPORT CANNON ROAD EXTENSION PROJECT WETLAND MITIGATION; 2006-08-01
:- 't ! •' Vç\ \Vs Iii :Preparedfor --" 63Farddy -t ---: - - - - t=ztr- -2z z- - AMECEàrth& EnvIrinmentaI Inc. - - - 921OSkyPärkCóiirti - an Diego, Càlifornia zz • -• :.. - -. - - --.. ;.- - .-.----- ;___.- --• -.---- --.--- - -'-- - -•--• -- --. -- -. - - - - - -• .___-:-: .':- -- - _ -- _•_.._ • - -.-._ - - _-._- _•_- - -_--..• •-.- ___-._- ._ - _.-_-_ - -_ -. .- - . .- - •-- - - --=-- - - FINAL REPORT CANNON ROAD EXTENSION PROJECT WETLAND MITIGATION FOR REACH 1 Prepared for: City of Carlsbad 1635 Faraday Avenue Carlsbad, California 92008 Submitted by: AMEC Earth & Environmental, Inc. 9210 Sky Park Court, Suite 200 San Diego, California 92123 (858) 300-4300 August 2006 Project No. 319721000 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 TABLE OF CONTENTS Page EXECUTIVE SUMMARY ..........................................................................................................IV 1.0 INTRODUCTION ............................................................................................................ 1 1.1 Project Location ..................................................................................................1 1.2 Project History.....................................................................................................1 1.3 Project Objectives...............................................................................................4 2.0 SUCCESS STANDARDS...............................................................................................4 3.0 HORTICULTURAL MONITORING.................................................................................6 3.1 Seedling Establishment ....................................................................................... 6 3.2 Container Plant and Cutting Health .....................................................................7 3.3 Natural Recruitment...........................................................................................10 3.4 Irrigation.............................................................................................................12 3.5 Nonnative Plant Populations ..............................................................................12 3.6 Destructive Human Uses....................................................................................13 3.7 Pests and Diseases ...........................................................................................13 3.8 Wildlife Habitat Value.........................................................................................14 4.0 BOTANICAL MONITORING ........................................................................................15 4.1 Monitoring Methods............................................................................................15 4.2 Analysis of Botanical Monitoring.........................................................................16 4.2.1 Percent Cover ........................................................................................16 4.2.2 Tree Heights...........................................................................................16 5.0 RECOMMENDATIONS ................................................................................................20 5.1 Evaluation of Restoration Success.....................................................................20 5.2 Recommendations.............................................................................................21 6.0 REFERENCES.............................................................................................................21 31972 1000-1009/R0806-028 Page i City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 LIST OF FIGURES Figure1 Regional Location Map...............................................................................................2 Figure 2 Cannon Road Wetland Mitigation Site Location..........................................................3 Figure 3 Cannon Road Wetland Mitigation Site Photo Viewpoint Locations .............................8 Figure 4 Cannon Road Wetland Mitigation Site Transect Locations and Photograph Locations...................................................................................................................18 LIST OF TABLES Table 1 Success Standards for the Cannon Road Wetland Mitigation Site..............................5 Table 2 Species Detected from the Seed Mix on the Cannon Road Wetland Mitigation Site2006....................................................................................................................7 Table 3 Container Plant and Cutting Mortality for Cannon Road Wetland Mitigation Site 2002 and 2003 ...........................................................................................................9 Table 4 Species Detected at the Cannon Road Wetland Mitigation Site 2001 through 2006..........................................................................................................................11 Table 5 Cover by Species, Cannon Road Wetland Mitigation Site 2002 and 2003.................19 Table 6 Average Heights of Container Plants for the Cannon Road Wetland Mitigation Site2002 through 2006.............................................................................................20 LIST OF APPENDICES APPENDIX A Correspondence..............................................................................................22 APPENDIX B Photo Viewpoint Locations for 2001 - 2006 ....................................................23 APPENDIX C Photo Documentation at Transect Locations 2002 - 2006 ...............................24 31972 1000-1009/R0806-028 Page ii City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 Cannon Road Extension Project Wetland Mitigation PROJECT TIMELINE Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2001 IC 2002 V fl 2003 - 77 OW R V 2004 2005 2006 M V RT LLLJ= Completion of maintenance and monitoring period by AMEC to date IC = Completion of installation of the mitigation program EC = Completion of the 120-day establishment period and beginning of the 5-year maintenance and monitoring period M = Annual botanical monitoring - R =Annual report due OW = Irrigation turned off V RI = Final report and termination of the maintenance and monitoring period 31972 1000-1009/R0806-028 Page iii City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 EXECUTIVE SUMMARY This is the fifth and final annual report for the wetland mitigation monitoring program of the temporary wetland impacts associated with the construction of Macario Canyon Bridge within Reach 1 of the Cannon Road Extension Project. AMEC Earth & Environmental, Inc. (AMEC) is the biological consulting firm responsible for the 5-year monitoring of the wetland mitigation site. A total of 2.58 acres of southern willow scrub and freshwater marsh were temporarily impacted during the construction of Macario Canyon Bridge. Of the 2.58 acres, approximately 0.68 acre was temporarily impacted during the construction of project access roads and staging areas. Another 1.9 acres were temporarily impacted during bridge construction and through the shading of native riparian vegetation under Macario Canyon Bridge. The wetland mitigation site consists of a revegetated access road, the area underneath Macario Canyon Bridge, and a revegetated slope in the northeastern portion of the wetland mitigation site. Year 5 success standards (e.g., vegetative cover, container plant and cutting survival, and tree heights) for the wetland mitigation site have been achieved. Year 5 success standards for percent vegetative cover and survival of container plants and cuttings were achieved or surpassed in Year 2 (2003). Because of this, vegetative cover and container plant survival were not measured in Year 3 (2004), Year 4 (2005), or Year 5 (2006). The Year 5 success standards for tree heights were achieved by Years 3 and 4 for all tree species except the arroyo willows (Salix lasiolepis). In June 2006, tree heights were recorded and all trees had reached the Year 5 success standards for tree heights, including arroyo willows. In addition, the successful natural recruitment of native plants onsite, in combination with the minimal invasion of nonnative plants onsite, has caused the mitigation site to be difficult to distinguish from the adjacent mature riparian forest. AMEC and the City of Carlsbad (City) met with the responsible resource agencies (i.e., U.S. Army Corps of Engineers [USACE], U.S. Fish and Wildlife Service [USFWS], and California Department of Fish and Game [CDFG]) last year (Year 4) to request early sign-off of the site. The resource agencies agreed to sign off the site, but requested that maintenance and monitoring be continued through Year 5 to ensure the site's success, which has now been done. AMEC received a sign-off letter from USACE and a sign-off e-mail from USFWS last year stating that the site has been successful in reaching all of its success criteria. Therefore, the City has met its wetland permit requirements for the project. 319721000-1009/R0806-028 Page iv City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 1.0 INTRODUCTION This is the fifth annual monitoring report of the wetland mitigation monitoring program for the temporary wetland impacts associated with the construction of Macario Canyon Bridge in Reach 1 of the Cannon Road Extension Project in San Diego County, California (Figure 1). The Cannon Road Extension Project consists of the construction of a four-lane arterial road from Car Country Drive to El Camino Real. The project is broken into two parts: Reach 1 and Reach 2. Reach 2 of the Cannon Road Extension Project, which will not be discussed in this report, begins where Reach 1 meets Faraday Avenue and extends east to El Camino Real (Figure 1). AMEC Earth & Environmental, Inc. (AMEC) is the biological consulting firm responsible for the 5-year monitoring of the wetland mitigation site. The project is authorized under the U.S. Fish and Wildlife Service (USFWS) Biological Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers (USACE) Permit Application No. 97-20130-TCD and 97-20131-TCD, City of Carlsbad (City), California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. 1.1 Project Location Reach 1 of the Cannon Road Extension Project and the wetland mitigation site associated with the construction of Reach 1 are located south of Agua Hedionda Lagoon between Interstate 5 and Faraday Avenue in Carlsbad, California (Figure 2). Reach 1 extends from Car Country Drive onto the mesa above Agua Hedionda Lagoon and traverses Macario Canyon near its confluence with the lagoon basin. Reach 1 of Cannon Road crosses Macario Canyon on Macario Canyon Bridge and continues on Cannon Road Reach 2. 1.2 Project History Installation of the wetland mitigation site began in January 2001 and was completed in March 2001. The 120-day maintenance period began late March 2001 and ended in July 2001. Valley Crest, the landscape maintenance contractor during this time, performed the installation and 120-day maintenance of the wetland mitigation site under the direction of the consulting firm Dudek and Associates (Dudek). The maintenance and monitoring period began in July 2001 following the inspection meeting on 23 July 2001. In August 2001, AMEC began monitoring the wetland mitigation site and Native Landscape, Inc. (Native Landscape), the landscape maintenance contractor, began maintenance of the wetland mitigation site. During Year 1, AMEC completed monthly horticultural monitoring visits and an annual botanical monitoring visit and submitted letter reports and the First Annual Report to the City. AMEC continued the same monitoring and reporting protocol during Years 2 through 5 as outlined in the Conceptual Wetland Mitigation Plan (Ogden 2000). This report summarizes all project-related activities and site progress during Year 5. Official project correspondence for the monitoring program is included at the end of this report (Appendix A). 319721000-1009/R0806-028 Page 1 79 76 76 Ocense to Vista 78 Carlsbad San- aro~o EscIido R 78 i\ °° () 1. J' (78 Encinitas-7 J .1• :V'. 1/ ' * I Poway iJYela 56 - ' _,i •. >os C( Santee : 52 Legend * Project Location ® Major Cities County Boundary Rivers Current Freeways Lakes and Ocean El CajonIn an iego 163 *2 La Mesa 12 94 1 Lemon Grov tj 75' )w e C'uronado®.. .NaiionaIC Map Notes r Projection: Stateplarie (Zone 6). NAD83, Feet • Base Data: - SANDAG - County Boundaries, Places SANDAG - Rivers. Lakes - Caltrans Data: . Current Freeways . - - - Miles -. - o 1 2 3 4 5 L:!souirblolcannoniarcmap/reglonai_Iocauos.mxc Chula Vi~ta j I 90 08/04106 Regional Location Map FIGURE 1 ö1' j,cicp ZIP If i a a r — I1 - City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 1.3 Project Objectives A total of 2.58 acres of southern willow scrub and freshwater marsh were temporarily impacted during the construction of Macario Canyon Bridge. Of the 2.58 acres, approximately 0.68 acre was temporarily impacted during construction of project access roads and staging areas. Another 1.9 acres were temporarily impacted during bridge construction and through the shading of native riparian vegetation under Macario Canyon Bridge. The wetland mitigation site consists of a revegetated access road, the revegetated area underneath Macario Canyon Bridge, and a revegetated slope in the northeastern portion of the wetland mitigation site. The goal of the wetland mitigation program is to restore the site to preexisting riparian and wetland habitat functions and values. The overstory of the restored habitat is to be dominated by willows (Salix sp.), mulefat (Baccharis salicifolla), and blue elderberry (Sambucus mexicana). The understory is to be dominated by arrow weed (Pluchea sericea), California wild rose (Rosa californica), California blackberry (Rubus ursinus), Douglas mugwort (Artemisia douglasiana), San Diego sagewort (Artemisia pa/men), western ragweed (Ambrosia psiostachya), yerba mansa (Anemopsis californica), Mexican rush (Juncus mexicanus), and great marsh evening- primrose (Oenothera elata ssp. hirsutissima). Maintenance and monitoring of the mitigation site was ongoing throughout each year of the project. Maintenance activities such as nonnative weed control occurred at appropriate times of the year by the landscape maintenance contractor, Native Landscape. Qualitative horticultural monitoring occurred monthly for the first 2 years of the project and 8 times a year for Years 3 through 5 of the project. Botanical monitoring was conducted annually to quantitatively assess the status of the wetland mitigation site with the success standards. If a vegetation community was not satisfying interim performance goals and was considered to be deficient for achieving final success standards in Year 5, remedial measures were implemented.. Success standards for the wetland mitigation site are outlined in the Conceptual Wetland Mitigation Plan (Ogden 2000). The success standards are specific percentages of native plant cover, container plant and cutting survival, and tree heights to be achieved through the mitigation. The goal of the project was to meet all success standards by Year 5. 2.0 SUCCESS STANDARDS Success standards are yearly performance standards for evaluating progress of the wetland mitigation site. During the course of this project success standards were evaluated annually to determine if remedial measures to correct deficiencies in project progress were required. The qualitative horticultural monitoring data and quantitative botanical monitoring data collected were analyzed against these success standards, and are outlined in Table 1. 319721000-1009/R0806-028 Page 4 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 . August 2006 - . Table 1. Success Standards for the Cannon Road Wetland Mitigation Site Stàndárd /I! Rmediàl MeUré if Standard:Not Met Year 1 50% visual ground cover Reseed/replant, substitutions possible Establishment of all species planted or seeded Reseed/replant, substitutions possible 90% healthy container plants - Replace with same species/size 80% healthy cuttings Year 2 All trees of acceptable growth rate in height Mulch and/or fertilizer may be recommended by the restoration biologist 90% survival of tree container plants' 80% survival of shrub container plants' Replant with same speies/size 80% survival of cuttings 70% total visual ground cover for all species Additional seed or container plants as recommended combined by restoration biologist Years 3 through 5 Height standards met for all trees Replant or receive remedial measures Tree Height Standards2 Year 3 Year 4 Year 5 Black willow (1 gallon) 8 10 12 Arroyo willow (1 gallon) •. 8 10 12 Narrow-leaved willow (1 gallon) ' . 4 6 8 Blue elderberry (1 gallon). 4 5 6 90% survival of tree container plants' 80% survival of shrub container plants' Replant with same species/size 80% survival of cuttings 75% cover by all species in Year 33 0 3 80/0 cover by all species in Year 4 . Additional seed or container plants as recommended by restoration biologist 90% cover by all species in Year 53 gradually be withdrawn from the mitigation area during Years 3 and 4. No further irrigation will be Ea ppli edYear 4. For the project to be considered successful, plants must survive one full dry season lemental irrigation. FM me aiscretion or me restoration otologist, aeaa container plants can be mitigated for by naturally invading seedlings, it such I , seedlings are within 5 feet of the original plants and of similar species or habitat value. 2 All heights given in feet. . Cover of freshwater marsh species is acceptable in place of southern willow scrub species. I • . , • )•. •._• . • 319721000-1009/R0806-028 - Page City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 3.0 HORTICULTURAL MONITORING AMEC continued horticultural monitoring of the wetland mitigation site during Year 5 as outlined in the mitigation plan (Ogden 2000). Horticultural monitoring at the site included a qualitative assessment of the following parameters: seedling establishment, container plant and cutting health, natural recruitment, irrigation, nonnative plant populations, destructive human uses, pests and diseases, and wildlife habitat value. Monitoring also included photo documentation of the wetland mitigation site. Representative locations, identified in Figure 3, were chosen to provide photographic overview of the wetland mitigation site's progress over the 5-year maintenance and monitoring program. These photographs were taken during botanical monitoring visits in 2001 (immediately following installation of the mitigation), 2002, 2003, 2004, 2005, and 2006 (Appendix B). The following section includes a discussion of each horticultural parameter followed by an overall assessment of the wetland mitigation site in relation to the parameter. 3.1 Seedling Establishment Seedling germination and establishment are based on a variety of factors, including seasonal rainfall, aspect, soil disturbance, proximity to nonnative invasive plant species, seed viability, and timing of seeding. Evaluation of this parameter includes identifying seedlings of the species included in the native seed mix and following their growth and establishment. Establishment of seeded species, both with respect to diversity and density of individual species, continues to be very good this year, with many seedlings developing into mature shrubs. The wetland mitigation site progressed favorably in Year 5 with excellent native seedling establishment and recruitment (see photo viewpoints in Appendix B). The density of seedlings observed during horticultural monitoring surveys has decreased compared to Years 1 through 4. This was anticipated, however, as seedlings that established during the first 4 years begin to compete more effectively for limited resources (e.g., sunlight, water) and there is less unvegetated space for new seedlings to emerge. Nonnative and invasive species did not affect seedling establishment in Year 5. The original seed mix used at the mitigation site included western ragweed, yerba mansa, Douglas mugwort, San Diego sagewort, mulefat, and great marsh evening-primrose. All of the species from the original seeding efforts have established and were detected with the wetland mitigation site in Year 5 (Table 2). Many of the established plants from the seed mix were observed flowering and setting seed during Year 5, including Douglas mugwort, mulefat, and western ragweed. Because of the native seedling success, no additional seeding was necessary during Year 5. All species in the seed mix established in the wetland mitigation site in Year 1, thus satisfying the seedling establishment success criterion. There were no specific success standards established for seedling establishment in Year. 5. 319721000-1009/R0806-028 Page 6 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 Table 2. Species Detected from the Seed Mix on the Cannon Road Wetland Mitigation Site 2006 --• 'Scientific Name - Common Name .- Detected within - Ste i Ambrosia psilostachya Western Ragweed X Anemopsis californica • Yerba Mansa X Artemisia douglasiana -. Douglas Mugwort X Artemisia palmer! San Diego Sagèwort X Baccharis salicifolia Mulefat X Juncus mexicanus Mexican Rush Not planted Qenothera elata ssp. hirsutissima Evening-Primrose X - Nomenclature follows Simpson and Rebman 2001. 3.2 Container Plant and Cutting Health The health of container plants and cuttings installed within the wetland mitigation site was visually assessed. If plants appeared to be in poor health, remedial measures were recommended. Dudek conducted a 120-day dead plant count in June 2001 and some dead - • • container plants were replaced after this period. Approximately 1,074 one-gallon container plants and 513 cuttings were originally planted in the wetland mitigation site in January 2001. These included 45 Fremont cottonwood (Populus fremonti,), 100 narrow-leaved willow (Salix exigua), 158 black willow (Salix gooddingii, 175 arroyo willow (Salixlasiolepis), 62 blue elderberry, 184 mulefat, 42 arrow weed, .1 140 California wild rose, and 168 California blackberry container plants as well as 258 muléfat •. and 255 arroyo willow cuttings. Success standards for Years 3 through 5 required that 90 percent of tree container plants and • 80 percent of shrub container plants and cuttings survive (Table 1); or no more than 10 percent mortality and 20 percent mortality, respectively, may occur. During October 2002 and 2003, all container plants and cuttings were counted to determine their survival at the end of Years 1 -- and 2. Container plants and cuttings (of both trees and shrubs) met and surpassed these criteria in Years 1 and 2 (Table 3). Therefore, the mitigation site achieved and surpassed all success standards for container plant and cutting survival associated with Year 5 and were not assessed again in Years 3, 4, and 5 (AMEC 2003, 2004, 2005, 2006) t - •• •. ••4 ..• ••- - - V , 319721000-1009/R0806-028 Page 7 City of Carlsbad . Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 Table 3. Container Plant and Cutting Mortality for Cannon Road Wetland Mitigation Site 2002 and 2003 : , ;,;r:Nu Curn '-Species CommonName:.Type- Planted . Number -- Percent Number - Percent Number el - Percent Dead Dead', Dead Baccharis salicifolia Mulefat cuttings 258 13 5.0% 8 3.1% 21 8.1% Baccharissalicifolia Mulefat 1-gallon 184 1 0.5% 0 0.0% 1 0.5% Pluchea sericea Arrow Weed liners 42 0 0.0% 0 0.0% 0 0.0% Populusfremontii Fremont Cottonwood 1-gallon 45 2 4.4% 4 8.9% 6 13.3% Rosa californica California Wild 1-gallon 140 21 15.0% 3 2.1% 24 17.1% Rose Rubus ursinus California Blackberry 1-gallon 168 30 17.9% 3 1.8% 33 19.6% Salix exigua Narrow-leaved 1-gallon 100 2 2.0% 1 1.0% 3 3.0% Willow Salix gooddingii Black Willow 1-gallon 158 5 3.2% 1 0.6% 6 3.8% Salix lasiolepis . Arroyo Willow cuttings 255 15 5.9% 20 7.8% 35 13.7% Salixiasiolepis Arroyo Willow 1-gallon 175 4 2.3% 6 3.4% 10 5.7% SambUCUS Blue Elderberry 1-gallon 62 2 3.2% 0 0.0% 2 3.2% mexicana Unknown 1-gallon 6 0 6 Total 1,587 101 6.4% 46 2.9% 147 9.3% Total ree aTrer piants 540 15 2.8% 12 2.2% 27 5.0% Total Shrub Container Plants 534 52 9.7% 6 1.1% 58 10.9% 513 28 1 5.5% 1 28 5.5% 1 56 10.9% It should also be noted that by 2004 it was no longer possible to accurately distinguish plants that occurred naturally onsite from container plants and cuttings that had been installed at the beginning of the project. In addition, the mitigation site success standards (Table 2) state the following: "At the discretion of the restoration biologist, dead container plants can be mitigated for by naturally invading seedlings, if such seedlings are within 5 feet of the original plants and of similar species or habitat value." Given that so many established, naturally recruited, native plants were in close proximatey to container plants and cuttings, it was the judgment of AMEC biologists that if any container plants and/or cuttings sporadically died during Years 3 through 5, their value to the site has been fully mitigated by the seeded and naturally recruited plants -. . onsite. . . . . . . -. . 319721000-1009/R0806-028 Page City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 3.3 Natural Recruitment In addition to planting and seeding activities, plants that established onsite may have originated from several sources, including propagules transported to the site by wind, water, or animal vectors. Similarly, a native seed bank was most likely already established in the soil. This natural recruitment played an important role in increasing the diversity and density of native plant species within the restoration area. This is particularly true for this wetland mitigation site since it is surrounded by healthy, well-established upland and riparian native habitats that serve as potential source populations for incoming seed. Evaluation of this parameter involved identifying germinating seedlings or volunteers that were not included in the seed mix, as these species must have been naturally recruited. Natural recruitment can also occur when native species that are seeded or planted within an area mature and produce seed on their own, thereby increasing the density of that particular species within the restoration area. A high number of native annual and perennial species produced seed in 2006, including mulefat, willow species, and western ragweed. This continuing input of native seed contributes to the recruitment of native plant species across the wetland mitigation site. A total of 69 plant species were observed at the wetland mitigation site through Year 5 (Table 4). This includes 46 native species, of which about half have colonized the site through natural recruitment. Species diversity is high for Year 5 and indicates the wetland mitigation site, as a whole, is performing well. The high diversity can be attributed to several factors: the presence of three vegetation associations (freshwater marsh, southern willow scrub, and coastal sage scrub) on and surrounding the wetland mitigation site, seeds from container plants and cuttings, seeds present in the soil, and seeds carried in from adjacent native habitats. Many obligate and facultative indicator wetland species not included in the seed mix were noted as occurring within the wetland mitigation site in the first annual report. These species, including alkali bulrush (Scirpus maritimus), small-fruited bulrush (Scirpus microcarpus), California bulrush (Scirpus californicus), spike rush (Eleocharis sp.), broad-leaf cattail (Typha latifolia), saltmarsh fleabane (Pluchea odorata), pickleweed (Salicornia virginica), southwestern spiny rush (Juncus acutus ssp. leopoldi,), and fireweed (Epiobium ciliatum spp. ciliatum), are naturally establishing, maturing, providing seed, and contributing to native cover and diversity in the wetland mitigation site. 319721000-1009/R0806-028 Page 10 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 Table 4. Species Detected at the Cannon Road Wetland Mitigation Site 2001 through 2006 Scientific Name Common Name Ambrosia psilostachya * Western Ragweed Anagallis arvensis Scarlet Pimpernel Anemopsis ca!ifornica* Yerba Mansa Apium graveolens Wild Celery Artemisia californica* California Dagebrush Artemisia douglasiana* Mugwort Artemisia palmed* San Diego Dagewort Atriplex semibaccata Australian Saltbush Baccharis pllularis* Coyote Bush Baccharis salicifolia* Mulefat Baccharis sarothroides* Broom Baccharis Brassica nigra Black Mustard Centaurea melitensis Tocalote Chenopodium sp. Pigweed Conium maculatum Common Poison Hemlock Cortaderia selloana Pampas Grass Cotula coronopifolia African Brass Buttons Cyperus sp. Sedge Deinandra fasciculata* Tarplant Deinandra paniculata * Tarplant Digitaria sanguinalis Crab Grass Eleocharis sp. Spike Rush Encelia californica* California Encelia Epiobium diiatum ssp. ciliatum* Willow Herb Eriophyllum con fertiflorum* Golden Yarrow Foeniculum vulgare Wild Fennel Gnaphalium sp. Everlasting Gnaphalium bicolor* Cudweed Gnaphalium californicum* California Everlasting Heliotropium curassa vicum * Salt Heliotrope Isocoma menziesir Coastal Goldenbush Juncus acutus ssp. IeopoIdii* Southwestern Spiny Rush Lepidium latifolium Perennial Pepperweed Lotus scoparius* Deerweed Lythrum hyssopifolium Grass Poly Marrubium vulgare Horehound Melilotus indica Yellow Dweet Clover Nassella pu!chra* Purple Needle Grass Oenothera elata ssp. hirsutissima* Great Marsh Evening-primrose Picris echioides Bristly Ox-tongue Plantago sp. Plantain Platanus racemosa * California Sycamore Pluchea odorata* Saltmarsh Fleabane Pluchea sericea* Arrow Weed Polypogon monspeliensis Rabbitfoot Grass Populus fremontii Fremont Cottonwood Ricinus communis Castor Bean Rorippa nasturtiumaguaticum* Water Cress Rosa californica Califomia Wild Rose 319721000-1009/R0806-028 Page 11 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 Table 4. Species Detected at the Cannon Road Wetland Mitigation Site 2001 through 2006 Scientific Name Common Name Rubus ursinus * California Blackberry Rumex crispus Curly Dock Salicornia virginica * Pickleweed Salix exigua* Narrow-leaved Willow Salix gooddingii* Black Willow Salix IasioIepis* Arroyo Willow Salsola tragus Russian Thistle Salvia mellifera* Black Sage Sambucus mexicana* Mexican Elderberry Scirpus californicus* California Bulrush Scirpus cernuus * California Club-rush Scirpus maritimus* Alkali Bulrush Scirpus microcarpus* Small-fruited Bulrush Solanum xantr Purple Nightshade Sonchus asper Prickly Dow Thistle Sonchus oleraceus Common Sow Thistle Spergularia marina Salt Marsh Sand-spurry Tamarix sp. Saltcedar Typha IatifoIia* Broad-leaf Cattail Xanthium strumarium* I Cocklebur Nomenclature follows Simpson and Rebman 2001. Denotes plant species native to southern California. 3.4 Irrigation Supplemental irrigation was used throughout the mitigation site to encourage plant growth and survival. Irrigation was turned off throughout a majority of the site on 1 June 2003 (Year 2) when it was deemed unnecessary for continued site success. Supplemental irrigation continued along the revegetated access road during most of Year 2 to discourage foot traffic and vagrancy. Supplemental irrigation was discontinued in this area on 6 October 2003, as the dense vegetation occurring along the revegetated access road was sufficient to discourage illegal usage of the mitigation site. In summary, a majority of the mitigation site has been off supplemental irrigation since 1 June 2003, and the entire mitigation site has been off irrigation since 6 October 2003. The mitigation site has surpassed the success criteria for the vegetation to survive 1 full year with no supplemental irrigation (Table 1). 3.5 Nonnative Plant Populations Control of nonnative plant populations is one of the most important factors in the success of any restoration project because invasive and nonnative plants prevent the establishment of native species by competing with them for important resources (Bossard et al. 2000). Maintenance weeding concentrated on invasive weed species, such as bristly ox-tongue (Picris echioides), pampas grass (Cortaderia selloana), saltcedar (Tamarixsp.), and perennial pepperweed (Lepidium latifolium), which pose a threat to native plant establishment. Maintenance weeding was completed with manual and mechanical techniques, and appropriate herbicides were applied where deemed necessary. 319721000-1009/R0806-028 Page 12 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 Nonnative weed species were minimal during Year 5 and never posed a significant threat to the native populations. Small, localized populations of the nonnative plants Spanish bayonet (Yucca aloifolia), perennial pepperweed, bristly ox-tongue, prickly sow thistle (Sonchus asper), common poison hemlock (Conium maculatum), myoporum (Myoporum Iaetum), and pampas grass were detected onsite or immediately adjacent to the site at the beginning of Year 5. These species were treated and controlled by Native Landscape periodically throughout Year 5 by a combination of mechanical weeding and spot spraying of herbicide, and were not detected at the end of Year 5. Nonnative plant species are not anticipated to become a problem within the mitigation site in the future as native cover is well established and should be able to outcompete nonnative seedlings that may sprout onsite. 3.6 Destructive Human Uses During Year 1 monitoring, bicycle and motorcycle tracks were observed in the wetland mitigation site, creating trails and thereby injuring or killing vegetation. In addition, a homeless encampment had been established in the southern portion of the site. The City sent a representative to the homeless encampment several times to inform the inhabitant(s) to vacate the wetland mitigation site, and the encampment was eventually abandoned. Destructive human use of the wetland mitigation site was a major focus of City resources and attention during Year 2 of monitoring. Motorized and nonmotorized vehicle use has been eliminated due to the maturation of the vegetation within and adjacent to previously used trails. Although the homeless encampment was vacated in October 2002, usage of the southern terminus of the revegetated access road continued into early 2003. Migrant workers were using this portion of the wetland mitigation site to bathe and wash clothing. To discourage usage, the City extended existing fencing in this area and installed new fencing at the northern terminus of the access road where it merges with the remainder of the project area. Twenty 1-gallon southwestern spiny rush container plants were installed on 7 November 2003 along the extended fenceline in the southeastern corner of the project area. These plants are now established and healthy and would be painful to walk through, which discourages trespassers from bypassing the fence where it meets with vegetation. A small portion of the access road used for bathing and washing clothes was towered in elevational grade to permit the pooling of water along currently utilized trails. In addition, the City posted signs in English and Spanish informing readers of the project area access restriction. The cumulative effect of these actions has led to the gradual abandonment of the mitigation site by former trespassers. Some signs of possible migrant worker activity were observed within the mitigation area in the beginning of Year 5; including a blanket, tarp, and shampoo bottles and other trash. However, this area was cleaned up and no more evidence of illegal usage has been noted. 3.7 Pests and Diseases A number of animal or insect species can become pests within restoration sites if their populations are not controlled or measures are not initiated to reduce their effect. Similarly, some plant diseases can have a devastating affect if the symptoms are not identified early and remedial actions are not employed. Many of the pests and diseases observed in restoration sites are naturally occurring and are often seasonally fluctuating events. A proactive 319721000-1009/R0806-028 Page 13 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 management program identified and evaluated these issues throughout the course of this project, and remedial measures were implemented if site success appeared jeopardized. Pests have not been a problem in Year 5. Minor herbivory by rabbits and gophers utilizing the wetland mitigation site did occur during Year 5. These mammals tend to favor narrow-leaved willow seedlings, saplings, and cuttings. However, no plant deaths were directly attributable to browsing by herbivores. Moreover, most of the vegetation in the mitigation site has matured to the point where the herbivory is negligible to the overall health of the site. Of greater concern is a persistent infestation of oyster-shell scale (Lepidosaphes u/mi) that broke out in Year 2 among willows and cottonwoods within the access road portion of the wetland mitigation site. Although scale species occur naturally throughout most riparian systems, heavy scale infestations have substantially reduced the health of many otherwise healthy willows along the revegetated access road, in some instances causing death. Plant-tek, a landscape pest management company, contained one outbreak of scale with the application of horticultural oil during spring 2003. Horticultural oil was used over chemical control methods as the required treatment coincided with bird breeding season. In fall 2003, oyster-shell scale was once again noticed on new growth of willows in the revegetated access road. The City contracted Plant-tek to spray the oyster-shell scale with Malathion, an organophosphate insecticide. This chemical was sprayed for mosquito abatement in lagoons in San Diego County; it has been shown to have a short half-life and is relatively safe for application near nontarget organisms (e.g., birds, mammals). On 9 December 2003, Plant-tek applied Malathion directly to the infested trees, thereby minimizing the quantity of chemical released into the project area. The mitigation area was monitored for the success of the scale treatment over the remaining horticultural monitoring visits (January, February, April, May, and June 2004). Pesticide application is considered successful if the scale does not disperse from the locations where they were sprayed. The scale treatment appears to have been successful as no oyster-shell scale was detected during Year 5. No significant pest or disease outbreaks were identified in the wetland mitigation site in 2006 and no additional corrective actions are recommended. The density of mature native vegetation present in the wetland mitigation site at the end of Year 5 suggests that the habitat within the mitigation area is robust and should be able to withstand small outbreaks of pests and/or diseases and continue to flourish. 3.8 Wildlife Habitat Value The quality of habitat within the wetland mitigation site has continued to improve during Year 5. The freshwater marsh component of the project area is at late-seral stage species composition and overall vegetative density. Through the growth of maturing container plants and high levels of natural recruitment, southern willow scrub habitat has become increasingly dense in many areas of the site. Although slower to develop, the revegetated coastal sage scrub area in the northeastern region of the project area has matured as expected and is well established. The overall wildlife habitat quality of the wetland mitigation site is moderate for open-habitat specialists and good to high for more closed-habitat specialists. The wetland mitigation site cover ranges from moderately dense with occasional openings in the revegetated access road to closed in the middle portion under the Macario Canyon Bridge. 319721000-1009/R0806-028 Page 14 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 Common wildlife species using the wetland mitigation site include pacific treefrog (Hyla regilla), lesser goldfinch (Cardue/is psaltria), mourning dove (Zenaida macroura), black phoebe (Sayornis nigricans), mice (Chaetodipus sp.), coyote (Canis latrans), raccoon (Procyon lotor), and bobcat (Fells rufus). Several sensitive wildlife species have also been using the site including coastal California gnatcatcher (Polioptila californica californica), yellow-breasted chat (Icteria virens), least Bell's vireo ( Vireo be/Ill push/us), white tailed kite (Elanus leucurus majusculus), red-tailed hawk (Buteo jamaicensis), and northern harrier (Circus cyaneus). Potentially suitable habitat exists onsite for southwestern willow flycatcher (Empidonax trail/Ii extimus). Least Bell's vireo has been documented as nesting in Macario Canyon for the past several years (Ogden 2000). Least Bell's vireo have been heard or observed within or adjacent to the mitigation site during horticultural monitoring visits in 2003, 2004, and 2005 (AMEC 2006). 4.0 BOTANICAL MONITORING AMEC biologists modified the botanical monitoring survey methodology in Years 3 through 5 (compared to the previous 2 years of botanical monitoring) since all Year 5 success criteria had been met in previous years except tree heights. Only tree heights were measured in 2006 as this was the only attribute that had not reached Year 5 success criteria. Most of the container trees within the mitigation site exceeded their Year 5 success standards for tree heights at the end of Year 2 (2003), with the exception of the arroyo willows, which fell short of the average tree height criterion by 7 inches (AMEC 2004). Because not all of the trees met the Year 5 success standards in Year 2, AMEC biologists measured and analyzed Year 3 tree heights in December 2004. Once again in Year 3, most container trees met the Year 5 success standards except for arroyo willows, which were short of the average tree height criterion by 5 inches this time (AMEC 2005). In Year 4, the arroyo willows were 2.5 inches short of the Year 5 success standard, but the mitigation site was signed off by the resource agencies because of the overall success of the site. In 2006 (i.e., Year 5) AMEC biologists measured and analyzed tree heights on 20 June 2006 to confirm that all of the container trees had met the Year 5 success criteria. Section 4.1 describes the monitoring methodology for the first 2 years (2002 and 2003) and the tree height monitoring transects for Years 1 through 5 (2002-2006). 4.1 Monitoring Methods Absolute percent cover data were not collected or analyzed for Years 3, 4, and 5 for the reasons discussed in Section 4.0. Absolute percent cover data were collected for Years 1 and 2. Six 30-meter by 3-meter belt transects were established in the same transect locations used in botanical monitoring for Year 1 (Figure 4). The transect locations were initially determined after the mitigation site was established in 2001 by randomly choosing a number on the x- and y-axes for the beginning of each transect. Transects 1 and 2 are located on the revegetated access road. Transects 3 through 6 are located in the wetland mitigation site underneath and adjacent to Macarlo Canyon Bridge. Transects 3 and 4 are on the east side of the wetland mitigation site. Transects 5 and 6 are on the west side of the wetland mitigation site. To ensure transects could be relocated in future years, the origin and terminus of each transect were marked with 5-foot PVC pipe and labeled with pink flagging. Documentary photographs were taken from the beginning of each transect facing in the direction in which the data were 319721000-1009/R0806-028 Page 15 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 collected in October 2002, October 2003, December 2004,' August 2005, and June 2006 (Appendix C). AMEC used the line intercept method to measure absolute percent cover of all plant species encountered along the transects. The linear extent to which each species intersected the transect was recorded directly into a hand-held computer. All plant species were identified to genus and species when possible. Absolute percent cover was calculated for the transects. Absolute cover measures the canopy cover of all layers of vegetation, taking into account the overlapping characteristics of many herbs, shrubs, and trees. Bare ground and litter were also recorded. Absolute percent cover will be referred to as percent cover for the remainder of this report. The data were analyzed to provide total cover of native and nonnative species, including a breakdown by each species. To collect tree height data during Years 1 through 5, belt transects were established alongside the same transects used to collect percent cover. Three meters were measured on the west side of the tape to create the belt transects on Transects 1 and 2, on the north side for Transects 3 and 4, and on the south side for Transects 5 and 6 (i.e., the right side of the tape when looking at the start of the transect). All belt transects are 30 meters in length. All container trees within the belt transect were measured in meters using a height pole. Pink flagging was tied onto each tree that was measured so that the same trees could be measured in the future, although it is understood that sample size may still vary from year to year. The tree height data were analyzed to calculate average height. 4.2 Analysis of Botanical Monitoring. 4.2.1 Percent Cover Total percent cover in the wetland mitigation site increased from 100.9 percent at the end of Year 1 to 115.4 percent at the end of Year 2 (Table 5). From Year 1 to Year 2, total native cover increased from 92.0 percent to 109.7 percent while total nonnative cover decreased from 8.8 percent to 5.8 percent (Table 5). Total percent cover for the wetland mitigation site performed above the Year 5 success standard of 90 percent cover for Years 1 and 2 (Table 1). Year 5 success standards for absolute percent cover were met and surpassed in Years 1 and 2, and therefore percent, cover was not remeasured in Years 3, 4, or 5. Native vegetative cover is largely attributed to arroyo willow, broad-leaf cattail, California bulrush, and black willow. These species have readily colonized the wetland mitigation site. The majority of the nonnative cover (6.5 and 4.8 percent for Years 1 and 2, respectively) is attributable to rabbitfoot grass, a noninvasive, nonnative, annual species. 4.2.2 Tree Heights Tree height data for Year 5 were collected 20 June 2006. Average heights for container plants for Years 1 through 5 are presented in Table 6. For Year 5, the average heights were as follows: planted mulefat container plants - 7.5 feet, narrow-leaved willow container plants - 13.4 feet, black willow container plants - 16.9 feet, 31972 1000-1009/R0806-028 Page 16 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 arroyo willow container plants - 12.4 feet, Fremont cottonwood container plants - 13.0 feet, and blue elderberry - 11.2 feet. For Year 5, all container plants outlined as having height success standards (narrow-leaved willow, black willow, arroyo willow, and blue elderberry) have achieved the final height success standards. The number of container plants measured along the transects (i.e., sample size) varied from year to year throughout the 5-year mitigation monitoring period (see Table 6). For example, there were less arroyo willow container plants found in Year 5 than in Year 4, and more mulefat container plants found in Year 5 than in Year 4. This could be partially attributable to some loss of container plants and replacement by other naturally recruited plants. As mentioned in Section 3.2, the Mitigation Plan allows for this when it says: "At the discretion of the restoration biologist, dead container plants can be mitigated for by naturally invading seedlings, if such seedlings are within 5 feet of the original plants and of similar species or habitat value." Furthermore, this variance in the number of plants found from Year 4 to Year 5 is probably more attributable to the maturity of the vegetation onsite and the corresponding difficulty in distinguishing container plants from the naturally recruited plants within the transects. 319721000-1009/R0806-028 Page 17 4••. p — I 1; I. I - $ / •.'• iç 1' • • • • j • - • ç;r i.i: • '. t - '• ,2' ;• • . '••j •• • . 4. / , . : ''ç .•. :; I or If I if I — •I / I Legend Photo . 1.1 11 Mitigation Site LI A lot 30-Meter — •. I' II •. S . S . • . S . S I J,irre 4 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 Table 5. Cover by Species, Cannon Road Wetland Mitigation Site 2002 and 2003 Scientific Name j H Common Name '' :Absolute:cover(%) Year 1 . . .(2oo2)4.; Absolute Cover. (%) 2 Year 2 (2003)- Salixiasiolepis Arroyo Willow 20.1% 28.3% Salix gooddingii Black Willow 8.3% 14.5% Typha latifolia Broad-leaf Cattail 12.1% 12.5% Scirpus californicus California Bulrush 10.3% 9.8% Baccharis salicifolia Mulefat 6.7% 9.1% Artemisia douglasiana Douglas Mugwort 6.3% 8.0% Scirpus maritimus Prairie Bulrush 7.4% 6.3% Anemopsis californica Yerba Mansa 1.8% 5.5% Polypogon monspeliensis Rabbitfoot Grass 6.5% 4.8% Rubus ursinus California Blackberry 1.6% 3.5% Salixexigua Narrow-leaved Willow 1.6% 2.9% Pluchea odorata Saltmarsh Fleabane . 7.6% 2.7% Artemisia palmeri San Diego Sagewort 0.4% 2.3% Ambrosia psi/ostachya Western Ragweed 2.5% 1.8% . Oenothera elata ssp. hirsutissima Great Marsh Evening- primrose 2.7% 0 0.6/0 Picris echioides Bristly Ox-tongue 2.3% 0.6% Juncus acutus ssp. IeopoIdii Rush Southwestern Spiny 0.1% 0 0.6/0 Rosa californica California Rose not detected* 0.4% Cotula coronopifolia Brass Buttons not detected* 0.3% Bacchanis pi/ulanis Coyote Bush 0.01% 0.3% Pluchea sercea Arrow Weed not detected* 0.3% Scirpus sp. Bulrush 0.7% 0.3% Eleocharissp. Spikerush 1.3% 0.1% Apium graveolens Celery not detected* 0.03% Heliotropium curassavicum Salt Heliotrope 0.5% 0.01% Sonchus oleraceus Common Sow Thistle not detected* 0.01% Epiobium ciliatum Willow Herb 0.03% not detected* Salicornia virginica Pickleweed 0.01% not detected* Bare ground Bare Ground not calculated 23.1% Litter Litter not calculated 3.5% Percent Total Cover 100.9% 115.4% Percent Native Cover 92.0% 109.7% Percent Nonnative Cover 8.8% 5.8% - inaicates mat me species was not aetectea on the botanical monitoring transects tor both Year 1 and Year 2. 319721000-1009/R0806-028 Page 19 11 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 • Table 6. Average Heights of Container Plants for the Cannon Road Wetland Mitigation Site 2002 through 2006 - Average Average Average. Average Average Tree Height Tree Height Tree Height Tree Height Tree Height Scientific Name Common Name in Feet in Feet .in Feet in Feet in Feet (Sample (Sample (Sample (Sample (Sample Size)""Size) Size) Size). Size) Year 1 Year 2 Year 3 Year 4 Year '5 Baccharis salicifolia Mulefat 6.0(25) 7.8(25) 9.0(21) 8.3(19) 7.5(33) Sa!ixexigua Narrow-leaved Willow 7.5(12) 12.2 (12) 11.6(6) 13.9(3) 13.4(6) Salixgooddingii Gooddings Black Willow 9.0(18) 12.5 (21) 13.9 (15) 15.8 (18) 16.9 (17) Salix lasiolepis Arroyo Willow 9.0(25) 11.4 (29) 11.6 (34) 11.8 (36) 12.4 (27) Populusfremontii Cottonwood 6.3(8) 9.6(8) 9.1 (4) 10.8(1) 13.0(1) Sambucus mexicana Blue Elderberry 4.0(5) 7.3(7) 7.0(6) 8.0(3) 11.2 (3) 5.0 RECOMMENDATIONS 5.1 Evaluation of Restoration Success Vegetation has established very well throughout the wetland mitigation site, meeting and exceeding all Year 5 success standards, including absolute percent cover and tree heights. Adequate seed establishment, greater than expected natural recruitment, and perennial water flow through the project area have all contributed to the continued success of this site. Nonnative plant invasion onsite is minimal, and is not expected to become a problem in the future due to the maturity of the native vegetation onsite. In addition, the habitat within the mitigation site has matured to a point that it has become difficult to distinguish it from the adjacent, mature riparian forest. Human disturbance of the site though off-roading and migrant worker activity has been reduced substantially since the beginning of the mitigation project. Therefore, this mitigation site has met or exceeded all of its Year 5 success standards. AMEC and the City met in the field with the USACE and USFWS representatives on 15 September 2005 and the CDFG representative on 15 December 2005 to discuss the success of the site. All of the resource agencies agreed that the mitigation site was successful and could be signed off. AMEC and the City received confirmation that the mitigation site could be signed oft from the USACE on 28 November 2005 (by letter), from the USFWS on 3 November 2005 (by e-mail), and from the CDFG in November 2005 (by letter April 17, 2006). However, the agencies requested that maintenance and monitoring of the site be continued through Year 5 to ensure the site's success, which has now been completed. This report documents the successful completion of the 5-year monitoring program of the Cannon Road mitigation site, and the fulfillment of the corresponding wetland permits for the project. 319721000-1009/R0806-028 Page 20 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 5.2 Recommendations The City has completed its 5-year monitoring of the Cannon Road mitigation site and fulfilled its wetland permits for the Cannon Road Project. The site is considered to be a success due to the quality of native habitat that has been restored onsite. The only recommendation for the future is for the City to periodically monitor the area for illegal usage of the wetland mitigation site by migrant workers and/or off-roaders, and to discourage such use as appropriate. 6.0 REFERENCES AMEC Earth & Environmental, Inc. (AMEC). 2003. First Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1. January. AMEC Earth & Environmental, Inc. (AMEC). 2004. Second Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1. January. AMEC Earth & Environmental, Inc. (AMEC). 2005. Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1. March. AMEC Earth & Environmental, Inc. (AMEC). 2006. Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1. February. Bossard, C.C., J.M. Randall, and M.C. Hoshovsky, editors. 2000. Invasive Plants of California's Wildiands. University of California Press, Berkeley, California. Ogden Environmental and Energy Services Co., Inc. 2000. Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California. July. Simpson, Michael C. and Jon P. Rebman. 2001. Checklist of the Vascular Plants of San Diego County. 3rd edition. SDSU Herbarium Press, San Diego, California. 31972 1000-1009/R0806-028 Page 21 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 Appendix A Correspondence 31972 1000-1009/R0806-028 Page 22 31 October 2005 Project No. 319721000-1007 City of Carlsbad Engineering Department Ms. Sherri Howard 1635 Faraday Avenue Carlsbad, CA 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): First Horticultural Monitoring Report for Year Five Dear Ms. Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this first horticultural letter report for year five of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project in Carlsbad, California (July 2000). The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-201 30-TCD and No. 97-20131 -TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No: 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, horticultural monitoring visits and reports must be completed monthly for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits must occur at a minimum of 8 times a year, and a horticultural monitoring report must be completed after each visit. On 20 October 2005, AMEC biologist Daryl Trumbo and botanist Halleh Paymard conducted the first horticultural monitoring visit for year five. During the visit, AMEC noted that the perennial pepperweed (Lepidium latifolium) and poison hemlock (Conium maculatum) populations had not returned. It appears that the perennial pepperweed infestation has been eradicated; however, the area should still be monitored for any sprouting individuals. Three small pampas grass (Cortaderia sp.) plants were located growing along the access road during the last visit and green flagging was tied onto adjacent willow trees to help guide Native Landscape in their eradication of these individuals. AMEC noted on this visit that these pampas grass individuals had been sprayed with herbicide by Native Landscape and were beginning to fade and lose their chlorophyll. AMEC pulled these individuals and transported them offsite during the visit. AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel 1 (858) 458-9044 Fax 1 (858) 458-0943 W:OO5\Projects\319721 000-1oo7_ci-carlsbad\Ro8o6-o28_App_A_Pt_1 .doc www.amec.com Page 1 Ms. Sherri Howard City of Carlsbad Engineering Department 31 October 2005 Three myoporum (Myoporum Iaetum) shrubs were observed south of Macario Bridge and west of the restored access road (i.e. closer to the northeast end of the Cannon Road bridge), growing on the boundary of the restoration site. It was recommended in the last horticultural report that these shrubs be sprayed with herbicide. It did not appear t hat these shrubs had been treated. During the visit, AMEC flagged the myoporum shrubs with green flagging to assist Native Landscape in locating them. In addition, a few small bristly ox- tongue (Picris echioides) individuals were found in this area. AMEC hand pulled these forbs and transported them offsite. AMEC also observed one small (i.e. approximately 3 foot tall) Canary Island date palm (Phoenix canariensis) along the edge of the access road portion of the restoration site, near the south end of the access road along the east edge. AMEC flagged the tree above this Canary Island date palm with green flagging to assist Native Landscape in locating it. AMEC recommends that the myoporum shrubs be removed mechanically and the stumps sprayed with herbicide. The Canary Island date palm should also be removed mechanically. In addition, any bristly ox-tongue found growing in the area around the myoporum shrubs should be hand-pulled and transported off-site. Riparian vegetative cover and plant species diversity are both very high at the site. Overall, the site continues to progress extremely well and all of the Year 5 success standards for the site have been achieved. AMEC is currently working with the resource agencies to receive sign-off of the mitigation site. AMEC will continue to monitor the mitigation site and coordinate with Native Landscape. If you have any questions, please call Daryl Trumbo at (858) 458-9044, extension 250, or email at daryl.trumbo@amec.com. Sincerely, Daryl Trumbo; Biologist AMEC Earth & Environmental, Inc. cc: Chris Fromme; Native Landscape, Inc. File 322012000-1001/R0806-028_App_A_Pt_1 Page 2 6 February 2006 Project No. 319721000-1007 City of Carlsbad Engineering Department Ms. Sherri Howard 1635 Faraday Avenue Carlsbad, CA 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): Second Horticultural Monitoring Report for Year Five Dear Ms. Howard, AMEC Earth & Environmental, Inc. (AMEC), submits this second horticultural letter report for year five of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project in Carlsbad, California (July 2000). The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, horticultural monitoring visits and reports must be completed monthly for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits must occur at a minimum of 8 times a year, and a horticultural monitoring report must be completed after each visit. On 2 February 2006, AMEC botanist Halleh Paymard conducted the second horticultural monitoring visit for year five. The following matters of concern were noted during the field visit: The presence of migrant workers throughout the mitigation site was very evident. A blanket, tarp, bottle of shampoo, and soap, as well as cans, bottles and other trash were noted during the visit (see attached photo). In addition, several foot-paths through riparian and marsh vegetation were observed. Areas that have been cleared of live vegetation as a result of trespassing or weed maintenance activities were also noted (see attached photo). These areas currently are composed of dead plant material and open pathways; they provide optimal openings for invasive weed species. Bristly ox tongue (Picris echioides), poison hemlock (Conium maculatum) and perennial pepperweed (Lepidium latifolium) seedlings were observed sprouting within these areas. It is recommended that these seedlings be sprayed with AMEC Earth & Environmental, Inc. 9210 Sky Park Court, Suite 200 San Diego, CA 92123 Tel 1 (858) 300-4333 Fax 1 (858) 300-4301 W:\2005\Projects\319721000-1007_City-Carlsbad\R0806-028_App_A_Pt_2.doc www.amec.com Page 1 Ms. Sherri Howard City of Carlsbad Engineering Department 6 February 2005 herbicide while they are young and manageable. AMEC will continue to monitor these areas for native plant recruitment. However, mulching may be necessary within these areas in order to keep future weeds from sprouting. Only one pampas grass seedlings was observed during the site visit, AMEC personnel pulled the individual and transported it offsite. A large clump of dead treated pampas grass was also observed. AMEC shall continue to monitor the site for pampas grass regeneration and coordinate with Native Landscape for removal. The three myoporum (Myoporum Iaetum) shrubs that were observed during previous horticultural visits appeared to have been treated with herbicide; however were not mechanically removed. These shrubs shall be monitored by AMEC during future visits in order to ensure they do not persist. A clump of Spanish bayonet (Yucca aloifolia) was observed along the eastern edge of the re-vegetated access road (see attached photo). This species is non-native and used as an ornamental plant. It produces new buds, or offshoots, near the base of the trunk, forming dense thickets. The clump of Spanish bayonet should be mechanically removed or treated with herbicide. The section of slope adjacent to the restoration site access road from Faraday Avenue continues to deposit sediment into the mitigation site (see attached photo). Although this sediment deposition is not affecting the establishment and recruitment of plants within the mitigation site, it has been suggested that sedimentation, especially from the slow and continual input caused by erosion, may affect how muddy or turbid stream water is, and it influences the shape of the stream channel and the aquatic habitats it can support. It is recommended that the depositional material be removed from the access road and new erosion control methods be implemented within this area. No oystershell scale (Lepidosaphes u/mi) infestation was noted during this visit. Overall the riparian vegetative cover and plant species diversity at the site are very high. Other than the issues noted above, the site continues to progress extremely well and all of the Year 5 success standards for the site have been achieved. AMEC will continue to monitor the mitigation site and coordinate the removal of weeds with Native Landscape. If you have any questions, please call Halleh Paymard at (858) 300-4333, or email at halleh.paymard@amec.com. Sincerely, Halleh Paymard Halleh Paymard, Botanist AMEC Earth & Environmental, Inc. cc: Chris Fromme; Native Landscape, Inc. File w:\2005\Projects\319721000-loo7_city-carlsbad\Ro8o6-028..App_A_pt_2.doc Page 2 25 April 2006 Project No. 319721000-1007 City of Carlsbad Engineering Department Ms. Sherri Howard 1635 Faraday Avenue Carlsbad, CA 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): Third Horticultural Monitoring Report for Year Five Dear Ms. Howard, AMEC Earth & Environmental, Inc. (AMEC), submits this third horticultural letter report for year five of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project in Carlsbad, California (July 2000). The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 208119980:5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, horticultural monitoring visits and reports must be completed monthly for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits must occur at a minimum of 8 times a year, and a horticultural monitoring report must be completed after each visit. On 21 April 2006, AMEC botanist Halleh Paymard conducted the third horticultural monitoring visit for year five. The following matters of concern were noted during the field visit: A migrant worker was observed passing through the site heading east toward the upland area. Bristly ox tongue (Picris echioides), and poison hemlock (Conium macu/atum) plants were observed in small amounts. Two small pampas grass seedlings were observed during the site visit, AMEC personnel pulled the individuals and transported them offsite. No oystershell scale (Lepidosaphes u/mi) infestation was noted during this visit. AMEC Earth & Environmental, Inc. 9210 Sky Park court, Suite 200 San Diego, CA 92123 Tel 1 (858) 300-4333 Fax 1 (858) 300-4301 W:\2005\Projects\319721000-1007_city-carlsbad\R0806-028_App_A_Pt_3cioc www.amec.com Page 1 Ms. Sherri Howard City of Carlsbad Engineering Department 6 February 2005 Overall the riparian vegetative cover and plant species diversity at the site are very high. Other than the issues noted above, the site continues to progress extremely well and all of the Year 5 success standards for the site have been achieved. This is the last monitoring visit for year 5 an annual report for year 5 shall be submitted to the City in the coming months. If you have any questions, please call Halleh Paymard at (858) 300-4333, or email at halleh.paymard@amec.com. Sincerely, Halleh Paymard Halleh Paymard, Botanist AMEC Earth & Environmental, Inc. cc: Chris Fromme; Native Landscape, Inc. File W:\2005\Projects\319721000-1007_City-Carlsbad\R0806-028_App_APt_3.doc Page 2 City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach August 2006 Appendix B Photo Viewpoint Locations for 2001 -2006 31972 1000-1009/R0806-028 Page 23 j Viewpoint IA - 2001 Viewpoint IA - 2002 iO232OO2 Viewpoint IA - 2003 Viewpoint IA - 2004 Viewpoint IA - 2005 Viewpoint IA - 2006 Cannon Road Wetland Mitigation Site Photograph Viewpoints 2001 - 2006 APPENDIX B4 Graphics2/3151/319721 000_i 007_Cannon Road/Appendix B 20061 Viewpoint 1A.fh8 1 T 4i A I all 11 V11,141 - wii~W 1 na i - - i - Ark CANRA 01, .1 * Photograph Viewpoints - 2006 1 1P Viewpoint IC - 2002 I Viewpoint IC - 2001 Viewpoint IC - 2004 Viewpoint IC - 2005 Viewpoint IC - 2006 APPENDIX Cannon Road Wetland Mitigation Site Photograph Viewpoints 2001 - 2006 Gaphi2/3151/319721000_1 007_Cannon Road/Appendix B 2006/ Viewpoint 1 C.fh8 Viewpoint IC-2003 Rh -, 4 :• .. - '4 -iI I 'k 1- C r -' VIP 10 40 77, "1 01, i • 2 .. N YA-r:..i .i.i IflW-1sIsP '' .i.j nw-z'is III fly %:$4 Rik RQ lilt x Ai - - -I— I IA a I1I - I F ---- -- - 11riI ~~ 76t I, :T Ae \' . Ic 511 • - ti- Jt RA \ 'r" 4,e , 7~4t?o C - -- 1, / Cf • WNJ11'- r; : J; flll,3i -- • V - • ,.,- r:.. - I zi Sir - I,. I- I j•i' - r-f, /C1 TV Vill lip lit pa ~ yj% IF W,~l W5 ~Y~ ; - ' . 4; JC C• ; .t• ',IV c4 )} or CC V J;' -'- - 4t I - VVIIdIIU lVIItI9dIIUII ILe I Photograph Viewpoints 2001 - 2006 I P r VIA 1, AIO lik -J----- \ _IIIL ' i a a r - WO - -j /J -J r Vill :: • '? jj Tsirr :t` KA 14 1 W i4 V 4 AL - 'ff'A 'Iii liu(.4W JT 4Y/t'L PTdLá WWI II --r I City of Carlsbad Final Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 August 2006 Appendix C Photo Documentation at Transect Locations 2002 -2006 319721000- 1009/R0806-028 Page 24 AMR 1, NMI, AT -IIIL- I A A 1' - - ' 4'IItV I Mffi11?' Rm rg JIlL - IA A T - 'A _III1- I a a 1 - om 141 •' ;; ( - IN IF M-irc IEF-UOT -:-- I Ij -.--.J A5 A55 5 S '- ' j '- ' V Owl : Or Ca A t4; S S - V - V rm ~'gm ig, Mo if _3 Lg Wim 51 I 4. 41-1 0 FIFTH YEAR ANNUAL REPORT 2004 Cannon Road Extension (Reaches I & 2) Wetland Mitigation Areas U.S ACOE Permit Nos. 97-20130-TDC & 97-20131-TDC CDFG Permit No. 5-044-97 USFWS Biological Opinion No. 1-6-01-F-1108 (formerly 1-6-9717-51) Coastal Commission Permit No. 6-97-11 Prepared For: City of Carlsbad Public Works-Engineering Department 1635 Faraday Avenue Carlsbad, CA 92008-7314 Prepared By: Native Landscape Inc. 9746 Tamarack Lane Escondido, CA 92029 I I Executive Summary This report documents installation and fifth year monitoring for the Cannon Road extension (Reaches 1 and 2) Wetland Mitigation Project. I The City of Carlsbad (City) has created 6.34 acres of new wetlands at three mitigation sites (A, C and D) to mitigate for impacts to 2.64 acres permanent and 0.68 acres temporary of jurisdictional wetlands impacted for project construction. I The report period is from September 2003 to September 2004. Monitoring and reporting of the 0.68 acre temporary impact re-vegetation effort is covered in a I separate report. Section 1.0 reviews the project history and mitigation site locations I Section 2.0 provides the results of the 4th and 5th year of post-installation monitoring I . The horticultural and botanical monitoring results for the fifth year of Sites C, D and Extra Area A are covered this year. I Section 3.0 compares the results of botanical monitoring against project success standards I Section 4.0 makes remedial recommendations for next growing year Section 5.0 provides a discussion for the Final Success Criteria on I Functions and Values I - These recommendations are summarized below: Site A: Additional 0.25 Acre I i. No remedial action is recommended at Site A 0.25 Acre Continue no irrigation Discontinue weed control Site C: El Camino Real 1. Discontinue maintenance and monitoring I Site D: Kelly Drive 1. Discontinue maintenance and monitoring I I Ell Native Landscape Inc. 2 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I I Monitoring Recommendations No further horticultural or botanical monitoring required at Site A, additional 0.25 acres, Site C or Site D. Native Landscape Inc. 3 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Table of Contents Executive Summary .2 1.0 INTRODUCTION AND BACKGROUND ....................................................... 6 1.1 Project History .........................................................................................6 1.2 Project Location ....................................................................................... 7 1.2.1 Site A: Macario Canyon ....................................................................7 1.2.2 Site C: El Camino Real .....................................................................7 1.2.3 Site D: Kelly Road .... .........................................................................7 2.0 POST— INSTALLATION MONITORING...................................................12 2.1 METHODS.............................................................................................12 2.1.1 Monthly Progress Reports...............................................................12 2.1.2 Horticultural Monitoring ...................................................................12 2.1.3 Botanical Monitoring........................................................................12 2.2 HORTICULTURAL MONITORING RESULTS.......................................14 2.2.1 Site A: Macario Canyon ..................................................................14 2.2.2 Site A: Additional 0.25 acres of Mitigation Planting.........................14 2.2.3 Site C: El Camino Real ...................................................................15 2.2.4 Site D: Kelly Drive ...........................................................................17 2.3 BOTANICAL MONITORING RESULTS.................................................18 2.3.1 Results Site A: Macario Canyon .....................................................18 2.3.2 Results: Site A: Additional 0.25 Acres.............................................18 2.3.3 Summary of Site A 0.25 Acre 5th Year Monitoring...........................21 2.3.4 Results Site C: El Camino Real ......................................................21 2.3.5 Results Site D: Kelly Drive ..............................................................25 3.0 DISCUSSION AND ANALYSIS OF PROJECT SUCCESS STANDARDS 29 3.1 SUCCESS STANDARDS ......................................................................29 3.2 DISCUSSION ........................................................................................31 3.2.1 Site A: Macario Canyon .................................................................31 3.2.2 Site A: Additional 0.25 Acre Area....................................................31 3.2.3 Site C: El Camino Real ...................................................................32 3.2.4 Site D: Kelly Drive ...........................................................................34 4.0 RECOMMENDATIONS.............................................................................35 4.1 SITE A: ADDITIONAL 0.25 ACRE MITIGATION AREA............................35 4.2 SITE C: EL CAMINO REAL...................................................................35 4.3 SITE D: KELLY DRIVE..........................................................................35 4.4 RECOMMENDATIONS .........................................................................35 5.0 FUNCTIONS AND VALUES ...................................................................... 35 List of Tables Table 1, Table 2, Table 3, I Table 4, Table 5, Table 6, I Native Landscape Inc. ~ I 4 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Revised Mitigation Acreage Summary....................................................7 Species Established at Site A: Additional 0.25 Acre Area....................19 Site A: Additional 0.25 Acre Area Summary Tree Height Data ............19 Site A: Additional 0.25 Acre Area Canopy Cover.................................20 Site A: Additional 0.25 Acre Area Tree/Shrub Density..........................21 Species Established at Site C...............................................................22 1 Table 7, Site C: Summary Riparian Woodland Tree Height Data ......................23 Table 8, Site C: Canopy Cover Growth ............................................................... 24 I Table 9, Site C: Tree/Shrub Density ..................................................................24 Table 10, Species Established at Site D.............................................................26 Table 11, Site D: Summary Riparian Woodland Tree Height Data ....................27 I Table 12, Site D: Canopy Cover Growth............................................................27 Table 13, Site D: Tree/Shrub Cover....................................................................28 I Table Table 14, Extant Plants in 2003..........................................................................28 15, Project Success Standards.................................................................31 List of Figures I Figure 1, Location of Mitigation Sites....................................................................8 Figure 2, Mitigation Site A, Additional 0.25 Acres .................................................. 9 Figure3, Mitigation Site C ..................................................................................10 Figure4, Mitigation Site D ..................................................................................11 Figure 5--Site A 0.25 (Transect 1A)..................................................................48 I Figure Figure 6 -- Site A 0.25 (Transect 2A)..................................................................48 7 -- Site A 0.25 (Transect 3A)..................................................................49 Figure 8 -- Site A 0.25 (Transect 4A)..................................................................49 I Figure 9 -- Site C Riparian Transect (East).........................................................50 Figure 10 -- Site C Riparian Transect (West)......................................................51 Figure 11 -- Salt Marsh Transect........................................................................51 I Figure Figure 12 SiteD Riparian Transect.................................................................52 13 Site D Salt Marsh Transect .............................................................52 -- I Appendix Appendix A, Observed Plant Species List ..........................................................37 Appendix B, Survey of Survival of Riparian Tree Species for Cannon Road Wetland Mitigation Area "D" at Kelly Drive and Park Drive..........................46 Appendix C, Transect Pictures ...........................................................................48 I I I I I Native Landscape Inc. 5 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I I 1.0 INTRODUCTION AND BACKGROUND I As mitigation for impacts to 3.30 acres of jurisdictional wetlands (1.72 acres of permanent direct, 0.9 acres of indirect shading, and 0.68 acres of temporary direct) associated with the construction of the Cannon Road Extension (Reaches 1 and 2) in Carlsbad, California, the City of Carlsbad (City) is creating 6.34 acres of new wetlands (Tetra Tech 1997, 1998) on three mitigation sites described below. This mitigation is designed to meet the conditions set forth in the I following permits and opinions: Army Corps of Engineers (ACOE) I Permits Nos. 97-20130-TDC & 97-20131-TDC California Department of Fish and Game (CDFG) Streambed Alteration Permit No. 5-044-97, 5-045-97 California Coastal Commission (CCC) I Coastal Development Permit No. 6-97-11 I . Fish and Wildlife Services (USFWS) Biological Opinion No. 1-6-01-F-1108 (formerly 1-6-97-F-51) I Initially Burkhart Environmental Consulting (BEC) and Native Landscape Inc. (Native Landscape) were hired by the City to install, monitor and maintain the new wetland areas. This report reviews the installation work completed for each I of the mitigation areas between 1 July 1999 and 11 October 1999 and presents an analysis of data collected to determine if the mitigations have progressed adequately to meet the 5-year success standards set by permits. The report I focuses on the fifth year of post-installation monitoring for Extra Site A completed in August 1999 and Site C and D installed in the Spring of 1999 1.1 Project History Mitigation acreage for this project was originally proposed for creation at only one site in Macario Canyon (Site A). The remainder of the mitigation requirements for the project was to be satisfied by a contribution to a long-term management endowment for the Agua Hedionda Lagoon Open Space Preserve. However, when the CCC would not accept the management contribution as appropriate mitigation, the City proposed three additional wetland creation sites in the project area (Sites B, C, and D). After hydrological analysis was completed for the Cannon Road Extension improvements, the project engineers concluded it would not be possible to use Site B for mitigation acreage. The City subsequently proposed relocating the Site (0.44 acres) to areas adjacent to each of the other mitigation sites (BEC 1/28/99). This relocation was approved by the resource agencies (Table 1). Native Landscape Inc. 6 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Original approved Acreage Final Installed Acreage Area A 4.10 4.35 Area B 0.44 0.00 Area C 1.30 1.45 Area D 1 0.50 0.54 Totals 1 6.34 6.34 Table 1, Revised Mitigation Acreage Summary 1.2 Project Location The final mitigation sites (A, C, and D) are located in the City of Carlsbad within the general vicinity of the road improvements that caused the original wetland losses (Figure 1). 1.2.1 Site A: Macario Canyon Site A is located adjacent to the existing Macario Canyon drainage south of the extension of Faraday Avenue to Cannon, referred to as the North and South Mitigation Areas. The additional 0.25-acre mitigation area designed to compensate for part of the loss of acreage at the eliminated Site B is a 10-foot strip planted on the eastern edge of the southern mitigation site in Macario Canyon and serves as a transition between the created habitat and the (non- wetland) upland buffer. The Macario Canyon drainage runs from Carlsbad Research Center Business Park, through the future Veteran's Memorial Park, under the Cannon Road Bridge into Agua Hedionda Lagoon. The mitigation sites are located in a 50 to 100 foot wide .strip on the east side of the existing wetland vegetation found in the drainage. The wetland creation sites along the drainage are bordered to the east by an approximately 90 to 100 foot wide upland buffer strip that has been seeded with coastal sage scrub species (Figure 2). 1.2.2 Site C: El Camino Real Site C is located about 300 feet northwest of the intersection of Cannon Road with El Camino Real. It is divided into North and South Mitigation Areas by a peninsula of existing riparian woodland and freshwater marsh. The southern area was a former flood control berm about 40 feet wide running about 1,000 feet in length parallel to the existing creek channel to the south. These berm soils were removed to create grades acceptable for wetland creation. (Figure 3) 1.2.3 Site D: Kelly Road Site D is at the west end of Kelly Street (off El Camino Real) where it intersects with Park Drive. A drainage channel enters the Agua Hedionda Lagoon open space at the southeast corner of the mitigation area and continues along its southern border. The site itself was created after a long peninsula of fill materials were removed to create wetland grades. The site is bordered on its south side by existing willow woodland along the creek drainage and on its north side by salt marsh (Figure 4). Native Landscape Inc. 7 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA VICINIr MAP WOT TO sc1 coy or VTA b AGUA HEDIONDA LAGOON -AREA C B (ELIMINATED) WETLAND MITIGA TION SITES A gRE A D RESTORA TION SITES MA CARlO CANYON 1 NORTH WETLAND BAD.\ /1 j CREA TION SITE AREA A SOUTH WETLAND UII CREATION SITE 28 ACRES PAMPAS GRASS REMOVAL BROWN HEADED COWBIRD TRAPPING — arT or ocWsioc / S FIGuR: Location of Mitigation Sites i _ I r V . - r t ----.---.-- - - — - - I • . . S • • • • S • • - . . I • a • • S •S . - - - •___d__.C___4__1c_ -- I. • • • • 5, ••. 55 •• •S•t .•. •5 . •• •• • a . •I • ?- .:. • t a . • • . S • •S S • S • S • S •• S • ' ' 5 • • • . • , I 0 8 acres added .. : : . '..' '. 5 ,. . .' ,•• tooriganalmit 4. . • • • a. • • • • plantings : : :. :. : '' •. • • •; . . : . ./ 4JiThT7 , '11 Ii -- ------ ---------- R Original Wetland. Mitigation Area • Extra 0.25 Acre Mitigation Area 11111 I I . ••.. Upland Buffer Zone Existing Riparian Woodland I I I I I I I 1 S • J Vegetation Transect Locations ' V '( '& 'c ic Site Protection Fence North Wetland Mitigation Site 5 0.25 acres added to replace -part of abandoned ...1•.. .•.. Area B ': .. : çT.:..•• •• Alkali marsh [plantin g South Wetland Mitigation Area North W— Wetland Mitigation Area (riparian woodland) Wetland Mitigation Area salt marsh) Existing Wetlands I 111111 Planted Part of Sewer Access Road Sewer Man Holes M.H. 0 icj I VegetationTransect Locations 0 00 RZ / S / • North Scale: 1:87 Ft. - F I G U R E Mitigation Site C I 3 1 a U Wetland Mitigation Area -irian woodland) Wetland Mitigation Area saltmarshl ' Existing Riparian Woodland •... Coastal Sage Sage Scrub Slope Planting Site Protection Fence x Culvert North Scale.: 1:80 Ft. FIGURE Mitigation Site D . .. 4 2.0 POST - INSTALLATION MONITORING Post-installation monitoring and maintenance for Macario Canyon Site A began in May 1998, for Sites C and D in July 1999, and for the additional 0.25 acres planted at Site A in August 1999. Final monitoring and reporting for Site A were completed last year. Monitoring is divided between regular horticultural visits to assess landscape maintenance needs and the collection of quantitative botanical data to determine progress towards permit success standards. Installation was finished half way through the first growing season for the original Macario Canyon plantings. Permit conditions require twice a year botanical monitoring. The City decided to perform the first monitoring for Site A at the end of the growing season in August 1998 and the second annual monitoring in August 1999. Although this schedule extended monitoring to an 18 month period for the first year, it then set a schedule for data collection for all mitigation sites to take place at end of the end of the maximum growth season each year. In 1999, monitoring frequency was changed to once annually for the remainder of the project. This year's report provides the fifth monitoring year of data for Sites C, U and the additional 0.25 acres added to the Site A. The following section discusses monitoring methods and results. 2.1 METHODS I 2.1.1 Monthly Progress Reports To document project progress during the first year, monthly progress reports summarized site observations and gave recommendations for remedial I measures. These reports are kept on file at the City and Native Landscape Inc. The first progress report was issued in May of 1998 when Valley Crest completed the Site A plant establishment period and Native Landscape Inc. began site I maintenance. After twelve months, since April 1999, report frequency was changed to a bi-monthly format for the remainder of the 5-year monitoring period. I 2.1.2 Horticultural Monitoring Horticultural monitoring consists of regular visits to the site to review the maintenance needs of the mitigation plantings. If required, remedial I maintenance recommendations are made to assure acceptable project progress. Remedial measures are communicated directly to Native Landscape Inc. for implementation in the field. Written communications are always used to assure I that accurate communication is achieved. These reports are forwarded to Sherri Howard at the City of Carlsbad, Engineering Department. I 2.1.3 Botanical Monitoring To collect botanical data on the progress of wetland habitat creation a series of 25-meter (82 foot) line transects are set up at each mitigation site except for the I additional 0.25 acres of mitigation at Site A where four 10 meter transects are used in order to obtain a better sampling of this linear site. Transects are located I. evenly throughout the mitigation sites to evaluate all areas of planting as follows: Native Landscape Inc. 12 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I Mitigation Areas Transect Numbers Site A Additional 0.25 acre area 1A -4A Site C Riparian Woodland 1C -2C Site C Salt Marsh 3C Site D Riparian Woodland S 1 D Site D Salt Marsh 2D The number of transects vary depending on the acreage at each mitigation site (transect numbers are provided under the results section for each site). Each end of the transect is marked with a 6-foot metal T-post and then the compass direction (based on magnetic north) recorded for future reference from a designated primary end of the transect. Figures for each site show the location of transects within the site with the primary end numbered. Along each of these line transects three data collection activities are performed to assess progress toward permit success standards. The three methodologies are detailed below. Riparian woodland and salt marsh portions of sites are separated from one another since they have very different species compositions, heights, and plant densities. In addition photographs are taken annually from the primary transect post facing in the direction of the transect compass bearing and a species list is prepared based on annual monitoring observations. Canopy Cover To assess the amount of riparian woodland canopy cover the line intercept values for all tree and shrub species over 18-inches in height are measured for each transect. Bare ground versus understory vegetative cover is also measured for vegetation cover. In salt marsh areas the cover of salt marsh species, non- native cover, and bare earth canopy cover categories are measured. No separate understory measurements are made for salt marsh covers since it has one canopy. Tree heights Within the 20 foot wide by 25 meter long belt transects used for measuring riparian woodland canopy composition, the heights of all container planted & naturalized trees are measured. With colonial species such as sandbar willow (Salix exigua), all trees in the clump are used to determine average height. Since few, if any, trees or large shrubs occur in salt marsh areas, no height measurements are taken in this cover type. I Native Landscape Inc. 13 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I I Composition of trees/shrubs Within a 20 foot wide belt transect centered on each line riparian woodland I transect the number of tree/shrub species over 3 feet in height are counted by species to determine canopy cover composition. Based on these counts, overstory canopy cover compositions and density are determined. Density I values are provided as total trees per 0.33 acre and compared to last years results. I For salt marsh areas counts were made of each perennial saltmarsh species. All canopies have merged; therefore, plant species cover alone quantifies it as an index of its success. I 2.2 HORTICULTURAL MONITORING RESULTS I 2.2.1 Site A: Macario Canyon I Seeding-upland buffer zone Coastal sage scrub species establishment remains somewhat sporadic in the upland buffer zone. The highest area of cover development continued to be adjacent to the North Mitigation Area where the surface weed seed bank had I been buried under fill from the excavation of the adjacent mitigation area, and adjacent to the South Mitigation Area. In most of this area nearly mature coastal sage scrub plants have now established including: Coastal Sage Brush I (Artemisia californica), Black Sage (Salvia mellifera), Flat-top Buckwheat (Eriogonum fasciculatum), Red Monkey Flower (Diplacus puniceus), Deerweed (Lotus scoparius), and California Sunflower (Encelia californica). Some stands I have become mature CSS habitat. I In the rest of the buffer zone running south from the North Mitigation Area establishment of coastal sage scrub species is similarly patchy. These areas remained dominated largely by annual weed species, which were present in the I seed bank at the time of installation. However, no further remedial activities are required for the buffer zone under permit conditions. I Though coastal sage scrub species are only sporadic here it is interesting to note that in 2002 and 2003 at least two California gnatcatchers were observed visually I and by their vocalizations during the biological monitoring of Site A. There has been no significant change in this buffer zone area over 2004. 2.2.2 Site A: Additional 0.25 acres of Mitigation Planting The establishment period for this mitigation area was completed in August 1999. I This is the fifth year's monitoring results. This is its third season without supplemental irrigation. In 2001 supplemental irrigation was approved in July - October, until the rainy season began. I Native Landscape Inc. 14 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I E Seeding I Hydro-seeding of this strip consisted of four (4) species, two of which were successfully seeded and the third was established from containers. Douglas Wormwort and Western Ragweed (Ambrosia psilosfachya) did persist I and have good cover. These plant species created a nearly continuous understory; therefore, a second seeding was unnecessary. Both these species also invaded the planting strip by means of runners from plants established in the I adjacent main mitigation area and it was difficult to distinguish between seedlings and these clonal plants. I Giant wild rye grass successfully established from containers. California Sunflower (Encelia californica) was the only species that did not establish. Since this species and the others seeded are not shade tolerant, it is expected that I understory will be minimal once the overstory matures. Container plants I The container plantings have established well at this site. All were thriving by the end of the second monitoring year. The Sandbar Willow and the Mulefat (Baccharis salicifolia) had some die back in the driest parts of the site (transect I 1A). One of the two oaks that were planted is growing and survived. Weeds I Weeds have not been a significant problem in this mitigation area since the original planting. I Watering The project has not been watered since 2001. Site was not watered in 2002, 2003 or 2004. Trash and vandalism There has been no trash dumped in this site or any vandalism to its plantings I during this past year. 2.2.3 Site C: El Camino Real 1 The establishment period for this mitigation area was completed in July 1999. I Seeding-riparian & marsh areas The species hydro-seeded at this site both in the saltmarsh and riparian woodland areas established well and are dominating the groundcover. I Douglas wormwood had comprised the dominant cover although there were small occurrences of the San Diego Sagewort (Artemisia paimeri). Riparian tree I cover has shaded-out most of this former understory in the transect areas; however, it still occupies more open areas. I . Native Landscape Inc. 15 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I Container plants The riparian woodland exhibited selective reduction of the lower growing Saltmarsh Fleabane (Pluchea sericea), Sandbar Willow (Salix exigua) and Mulefat (Baccharis salicifolia) but an increase in the tall willow species, primarily Arroyo Willow (Salix lasiolepis). Other willow species: Black Willow (Salix nigra) and Red willow (Salix Iaevigata) have also persisted in areas outside of the transects. The initial increases in numbers in 2002 and 2003 were due to a multitude of seedlings that have since selectively died off from natural thinning and have stabilized at somewhat more than the original 2001 planting. The objective of a mature willow woodland with continuous tree canopy has been achieved with an increased survival of the tall tree species. Saltmarsh plantings continued to demonstrate excellent establishment and growth with few losses. Woody Glasswort (Salicornia virginica), Alkali heath (Frankenia sal/na), and saltgrass are well established. Freshwater encroachment is occurring as result of the river's shifted alignment. This supplanting of saltmarsh species is shown by the increasing cover of cattail (Typha) and nutgrass (Scirpus robustus). Weeds There is no significant weed problem at this site. Watering There has been no irrigation at the site since 2000. Trash and vandalism There has been little trash and debris dumped at this site. The main incursion remains the pathway along the first third of the dike area, which is used both for maintenance and monitoring and as a pathway for workers to access a living site they maintain in the willows along the adjacent stream channel. This site is located on land owned by CDFG. The City and CDFG have agreed to cover the maintenance access trail with willow cuttings and to install a fence to deter access. Erosion Heavy winter rains in February 2000 created significant stream flows in the channel adjacent to the re-graded dike at this site. These stream flows ran over the dike in three separate places. The first at a notch left in the grading at the eastern end of the dike. The second through the existing erosion break in the dike left from the previous year and the third midway between these two areas. After the flooding had subsided it was found that the stream had now cut a new channel that runs through the gully in the dike created in 2001 and widened in 2002. This new channel then proceeds through the marsh area, which separates Native Landscape Inc. 16 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA the two parts of this flooding/erosion. It appears that this channel relocation has been beneficial to the riparian woodlands. Some GPS reassessment was completed here to determine the extent of hydrological change that has occurred and submitted with last year's annual report. GPS Report Conclusions The majority of Area C is dominated by southern arroyo willow woodland (Southern Willow Scrub), coastal salt marsh and freshwater marsh. The remaining non-tidal coastal brackish marsh habitat, while containing components of a true coastal brackish marsh, does not receive tidal influence. See Appendix B in last year's annual report for findings. 2.2.4 Site D: Kelly Drive The establishment period for this mitigation area was completed in July 1999. Seeding- riparian & marsh areas All native species hydro-seeded at this site, both in the saltmarsh and riparian woodland & Coastal Sage Scrub areas, had established by the end of the first summer after planting, and continue to thrive. The riparian woodland areas showed only sparse seed establishment after initial seeding. Only a few Douglas wormwood and an occasional San Diego sagewort were observed. Many salt marsh volunteers have established on the site that were not in the original seed mix. Nevertheless, because understory cover is usually minimal in mature riparian woodland and weeds have not been a problem, this lack of understory development was not considered critical to riparian woodland success at the site. Southwestern spiny rush germinated well at this site and now comprises a significant part of the cover. The coastal sage scrub seed mix placed on the roadside slopes which border the site performed quite well and all species germinated and established from seed in the seed mix. California sagebrush and Coast Goldenbush were the most significant germinators. Container plants Container plantings showed excellent establishment at this site. The riparian woodland area initially exhibited minor losses. Transect Dl has become mostly enclosed within the canopy of riparian tree species with an understory of salt marsh. Weeds As with the previous years, exotic weeds have not been a significant problem. Monitoring and maintenance activities were suspended to allow maintenance trails to fill-in and discourage other foot trails. This has been successful. Native Landscape Inc. 17 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Watering No watering of this site occurred in 2001, 2002, 2003 or 2004. Trash and vandalism There has been no trash or debris dumped at this site. Erosion The site is relatively flat and no significant erosion has ever occurred. GPS Report Conclusions The majority of Area D is dominated by coastal freshwater marsh and southern arroyo willow riparian forest. Non-tidal coastal brackish marsh accounts for approximately one-third of Area C. The remainder of the area is vegetated with Diegan coastal sage scrub that occurs on the higher elevations within the project study area adjacent to Park Road. See Appendix B in last year's report for findings. 2.3 BOTANICAL MONITORING RESULTS Formal botanical monitoring for Sites C and D and the Additional 0.25 acres at Site A began in 2000. The results for all mitigation sites are given in this section. 2.3.1 Results Siteç : Macario Canyon I Monitoring of Site A North & South has been discontinued after project achieved and maintained success criteria by year five (5). 2.3.2 Results: Site A: Additional 0.25 Acres I Species established Table 2 below shows species planted from seed and container plants at this I mitigation site and whether they are considered established at the site (X = established). Of the four species seeded on this site, the western ragweed and the Douglas wormwood established from the seed mix. Alternatively, the giant wild rye established from containers, so the only species not established was the I upland coastal California Sunflower (Encelia californica), some of which established in the adjacent buffer zone from seed. 1 El I Li Native Landscape Inc. 18 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I I I I From Seed Ambrosia psilostachya X Artemisia douglasiana X Encelia californica No Leymus condensatus No From Containers Baccharis salicifolia X Leymus condensatus X Quercus agrifolia X Salix exigua X Table 2, Species Established at Site A: Additional 0.25 Acre Area Container plant survival There was poor survival of some of the original containers of Salix exigua and Baccharis salicifolia at the higher areas of the site near transect 1A & 3A.. Drought and herbivory this year has eliminated some stands of Salix exigua. The damage from herbivory is a natural process, which is one of the important functions of wildlife habitat. Many plants have re-sprouted even from the tops of older branches or at the bases of the original planting, though some of the Sandbar Willow (Salix exigua) clumps were totally killed from this herbivory leaving a few barren areas. Tree heights Tree height data results are presented by species in Table 3. Only one Coast live oak has survived. Mulefat and Sandbar willow, are the only other woody plant species in this mitigation area. The height of these of these two species showed progress during drought, maintaining tree height above success standards. The Coast Live Oak was not a required planting; therefore, not required for project success. Average container tree Number Plants Counted height (ft) 2001 2002 2003 2004 2001 2002 2003 2004 Species Baccharis 6.6 9.2 7.6 8.5 25 12 24 12 salicifolia Salix exigua 6.0 7.0 6.2 7.0 103 82 16 10 Quercus 6.0 6.0 6.0 6.0 2 2 2 1 agrifolia Table 3, Site A: Additional 0.25 Acre Area Summary Tree Height Data Native Landscape Inc. 19 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I I I I I I I I I I Canopy cover Canopy cover results are summarized in Table 4. Areas not covered by overstory cover were almost 100% covered by understory species for all transects, some bare earth is recorded in the data set. Canopy cover continued to increase significantly, with the exception of Transect No. 1 where some die back had occurred in the original plantings of Salix exigua and Baccharis salicifolia. Transect Percentage of Cover 2001 2002 2003 2004 IA 0% 0% 0% 0% 2A 100% 100% 23% 70% 3A 44% 66% 71% 100% 4A 81% 112% 105% 125% Average Canopy Cover 56.3% 69.5% 49.8% 74% Bare Earth Cover 1 0% 1 0% 1 9% 1 4.5% Table 4, Site A: Additional 0.25 Acre Area Canopy Cover Tree/Shrub composition/density Although there was a decrease in Salix exigua in some sections of this site, Baccharis salicifolia showed an overall increase in density with many seedlings in 2003. Some of these seedlings survived to 2004 though the transect data documented this Baccharis salicifolia decline. Results of the 5th year transect data yielded an average shrub/tree cover of 74% (see Table 4). Since most of the site is well vegetated and fulfills the intended functions and values as a wetland/upland transition to the created wetland at Site A, further study was conducted to analyze this apparent deficiency. To determine if the 4-10 meter transects are an accurate representation of the 330m (1080') x 3 meter (10') area, another transect was recorded to full length of the site to document cover of the entire site. The results were that: > 197m (650') has >100% shrub cover of 8-9' average height > 76m (250') has 74% cover of 6' average height > 87m (260') has 0% mature shrub cover (except for mulefat seedlings under 3' height) Therefore, analysis of the entire site results in 78% of the site having good to excellent cover with 22% of the site having insufficient cover. Native Landscape Inc. 20 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for city of Carlsbad, CA I I I Average Tree/Shrub Composition and Density Species Number of Plants Percent Comp 2001 2002 2003 2004 2001 2002 2003 2004 Baccharis 25 12 24 12 salicifolia 20% 12.8% 43.0% 73.0% Salixexigua 103 82 16 10 80% 87.2% 16.0% 25.0% Total 128 94 1 40 22 100% 100% 59.0% 95.0% Table 5, Site A: Additional 0.25 Acre Area Tree/Shrub Density 2.3.3 Summary of Site A 0.25 Acre 5th Year Monitoring The cover and growth of this area has continued to improve through the third year of significant drought. There was a proliferation of Mulefat seedlings in 2003 which is an indication that the site does occur within appropriate wetland hydrology and other edaphic parameters. Though some of these seedlings have thinned and some Sandbar Willow have not survived 2002 herbivory does not hinder its succession toward Southern Willow Scrub habitat objectives in spite of the present protracted drought. 2.3.4 Results Site C: El Camino Real Species established Table 6 below shows the species planted from seed and container plants at this mitigation site and whether they are considered established at the site (X = established, ? = not detected to date). All species seeded or planted from containers at the site had established by the end of the first monitoring season except possibly yerba mansa. This species, however, had invaded from adjacent existing populations along the borders of the mitigation site. I I I I I I I I I I I Native Landscape Inc. 21 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects - Prepared for City of Carlsbad, CA I I Riparian Woodland Mix From Seed Anemopis californica No Artemisia douglasiana X Artemisia palmeri X Saltmarsh_Mix Cotu/a coronopifolia X Juncusacutus X Artiplex patula ssp. Hastata X Riparian Woodland From Containers Bacchanis salicifo/ia X Populus fremontii X Pluchea sericea X Salix exigua X Sa/ixgooddingii X Salix /asiolepis X Sa Itma rs h Baccharis sa/icifolia X Frankenia sa/ina X Juncus acutus X P/uchea sericea X Sa/icornia virginica X Distich/is spicata X Scirpus robustus X Table 6, Species Established at Site C - Container plant survival No container plants were observed dead as of the first year of monitoring at Site I C therefore no further attempt was made to assess survival. As before, the taller Salix /asio/epis is out competing Salix exigua at this site by shading it out creating a tall dense overstory with a diminishing story of Sandbar Willow, Arrow Weed I and Mulefat. No replacement plantings have been required at this site since dead plants were replaced at the end of the plant establishment period. I Tree heights Riparian woodland tree height data results are presented by species in Table 7. This data is only for the first two transects on this site (1A & 1 B) since these were I the only two transects in the riparian woodland part of the site. The height of all species showed achievement of the project height goals by the end of this fifth season after planting. I Native Landscape Inc. 22 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I Species Average container Tree Height (ft) Number of Plants Counted 2001 2002 2003 2004 2001 2002 2003 2004 Baccharis 7.0 7.0 salicifolia 7.0 7.0 18 19 21 3 Plucheasericea 6.1 6.0 7.0 7.0 16 15 15 1 Salix exigua 10.0 10.0 14.0 1 14.0 31 1 6 10 5 Salix lasiolepis 12.0 20.0 22.0 1 25.0+ 41 1 59 63 54 Table 7, Site C: Summary Riparian Woodland Tree Height Data 5th Year Botanical Monitoring For riparian and salt marsh habitats, the exact location of the two transects could not be relocated by the permanent stakes which formerly marked these sites. Though slight changes may occur from reading different transects the habitat through which data was collected is uniformly vegetated. This year transects were laid out approximately at the same location as had previously been analyzed. Canopy cover Canopy cover results are summarized in Table 8. The riparian woodland cover value for Site C is over 100%. Saltmarsh cover is quite high although freshwater encroachment continues to decrease the dominance of halophytes. Tree/shrub composition/density Tree/shrub density data are summarized in Table 9. All woody tree and shrub species in the riparian woodland part of the site above 3 feet in height were counted as occurring within the transect sampling area. All planted species were counted in the narrower (1 meter wide) saltmarsh transect bands. Salix lasiolepis expanded its density by shading out shorter shrubs. This has offset the loss of Baccharis salicifolia and Salix exigua. A total of 63 trees were detected which is not significantly different in overall tree density than previous years. Saltmarsh Density, survival and cover of saltmarsh species continued to decline. Freshwater encroachment shows increases in non-halophytic species such as Polypogon monspeliensis, Typha domingensis and Scirpus robustus though native halophytes still dominate the site they have declined in cover and diversity. The number of plants is impossible to determine since these groundcover plants canopies merged following the third growing season. This data can no longer be measured. Native Landscape Inc. 23 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Percent Cover Riparian Woodland Transects 2001 2002 2003 2004 1C 102% 82.4% 120% 172% 2C 110% 103% 100% 100% Saltmarsh_Transect 3C 130% 91.6% 71% 116% Table 8, Site C: Canopy Cover Growth Rinarian Woodland Transects IC & 2C Species No. Plants 2001 No. Plants 2002 No. Plants 2003 No. Plants 2004 % Relative Cover 2001 % Relative Cover 2002 % Relative Cover 2003 % Relative Cover 2004 Baccharis salicifolia 0 19 1 3 0% 9.0% 0.02% 1.7% Plucheasericea 0 15 15 1 0% 5.1% 13.2% 0.6% Salixexigua 31 6 10 5 43% 8.6% 16.8% 14.5% Salix lasiolepis 41 59 63 54 57% 65.0% 89.6% 75% Total 106 99 89 63 100% 100% 119.62% 91.8% Saltmarsh Site C Transects 3C No. Plants 2000 No. Plants 2001 No. Plants 2002- 2004* Species % Relative Cover 2000 % Relative Cover 2001 % Relative Cover 2002 % Relative Cover 2003 % Relative Cover 2004 Baccharis salicifolia 1 0 -- 0.6% 0.6% 0% 0% 0% Distichlisspicata 56 56 -- 36.4% 36% 50.8% 88.0% 6.9% Juncusacutus 4 4 -- 2.6% 3.0% 3.2% 10.0% 0% Salicorniavirginica 93 93 -- 60.4% 60% 23.9% 80.0% 17.2% Scirpusrobustus 0 3 -- 0% 2.0% 3.0% 16.0% 10.3% Ambrosia psiostachya 0 0 -- 0% 0% 0% 0% 0% Frankeniasalina 0 0 -- 0% 0% 0% 0% 13.8% Isocoma veneta 0 1 -- 0% 0% 0% 0% 0% Anemopsis californica 0 1 -- 0% 0% 0% 0% 0% Typhadomingensis 0 1 -- 0% 0% 1% 4.1% 48% Total 154 160 -- 100% 100% 100% 198.1 % 96% - u ne numoer OT plants is impossible to determine since these groundcover plants canopies merged following the third growing season. This data is no longer reported. Table 9, Site C: Tree/Shrub Density Native Landscape Inc. 24 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I Summary of Site C 5th Year Monitoring Conditions did not change substantially for either the riparian woodland or salt marsh habitats at this site in 2004. In the riparian woodland seasonal runoff continues to scour the former berm where planting and transects are located. The riparian tree and shrub species continue to respond to this optimal hydrologic condition and to grow in a very dense thicket which shades out some of the lower growing shrub species in favor of a mostly uniform willow canopy. The prevalence of worker habitations is an on-going problem since trails and latrine areas litter the re-vegetation site. Some cuttings of willows has occurred by these trespassers though it has not hindered cover or density of the riparian trees/shrubs. Obstructions and barriers have been planned for installation after the departure of migratory bird species to protect this habitat. Salt marsh habitat is largely occupied now by cattails, bullrush and other freshwater wetland species. The site is owned by CDFG who joined the City in maintaining the site by building a fence and barricading trails with willow thatch. 2.3.5 Results Site D: Kelly Drive Species established Table 10 below shows the species planted from seed and container plants at this mitigation site and whether they are considered established at the site (X established, ? = not detected to date). Container plant survival Few container plants were observed dead by the end of the first year of monitoring therefore no formal attempt was made to count them. Since then no further mortality.has been observed in this portion of the mitigation planting I I I I I Native Landscape Inc. 1 25 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Riparian Woodland Mix From Seed Anemopsis californica No Artemisia douglasiana X Artemisia palmeri X Saltmarsh_Mix Cotula cornopifolia X Juncusacutus X Atriplex patula ssp. Hastata X Coastal _Sagescrub_Mix Artemisia californica X Encelia californica No Eriogonum fasciculatum No Isocoma veneta X Vulpia microstachys X Riparian Woodland From Containers Baccharis salicifolia X Salix exigua X Salix lasiolepis X Sa Itmars h Frankenia sal/na X Juncusacutus X Salicornia virgin/ca X Coastal_Sagescrub Ambrosia psilostachya X Artemisia californica X Isomer/s arborea X Quercus agrifolia X Sambucus mexicana X Table 10, Species Established at Site D Tree heights Tree height data results are presented by species in Table 11. The height of all species showed completion of project height goals by the end of the second growing season after planting. Native Landscape Inc. 26 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Canopy cover Canopy cover results are summarized in Table 12. Saltmarsh cover exceeds project standards. Average Container Tree Height (ft) Number of Plants Counted Species 2001 2002 2003 2004 2001 2002 2003 2004 Baccharis 4.8 6.0 8.0 salicifolia 8.0 5 9 1 1 Salix exigua 7.1 9.0 14.0 14.0 62 6 10 2 Salix lasiolepis 14.6 17.0 22.0 15.0 16 59 2 5 Table II, Site D: Summary Riparian Woodland Tree Height Data Riparian Woodland Transects % Cover 2001 % Cover 2002 % Cover 2003 % Cover 2004 1 D - Tree/Shrub Cover 16 70 58 84 Understory Cover 25 30 76 59 Saltmarsh Transect 2D 139 77 183 138 Bare Earth Cover 0.0 0.0 0.0 0.0 Table 12, Site D: Canopy Cover Growth Tree/shrub composition/cover I Tree/shrub density data are summarized in Table 13. All woody tree and shrub species above 3 feet in height were counted as occurring within all riparian woodland transect sampling areas. The density of Salix exigua had increased I dramatically from the suckering of this species. Sandbar and arroyo willow account for a significant amount of cover currently within the riparian woodland transect area with arroyo willow now having a higher density than the sandbar I willow. Some willows are being crowded out or have thinned as the canopy closes with Arroyo willow and Black willow. I In saltmarsh areas, woody glasswort account for 45%, spiny rush account for an overstory with 100%, and Alkalai Heath (Frankenia sauna) 4.3% vegetative I cover. Salt Marsh Fleabane (Pluchea odorata), a biennial that occupies disturbed areas and openings, has been crowded out of the site since 2002. Since the establishment period the original saltmarsh container plants have I merged and are no longer distinguishable. Survival has not apparently declined as measured by cover rather than the number of plants. This has not been reported since 2001. I The overall reduced cover in salt marsh maybe due to reduced cover of halophytes in the understory of Juncus acutis which does not provide space for I understory species. Native Landscape Inc. 27 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I RiDarian Woodland Species Site D Transect I D Number of Plants % Comp 2001 2002 2003 2004 2001 2002 2003 2004 Baccharis 5 6 salicifolia 1 1 6.0% 5.7% 5.0% 7.1% Salix exigua 62 6 6 2 74.7% 21.0% 21.6% 29.5% Salix lasiolepis 16 15 2 5 19.3% 3.8% 31.3% 26.2% Juncusacutis 0 8 8 8 0% 8.9% 17.2% 19.0% Salicornia virginica 0 18 NA NA 0% 18.7% 31.2% 58.0% Total 37 40 17 16 100% 100% 106.3 108.4 Saltmarsh Species Site D Transect 2D % Relative Cover 2001 2002 2003 2004 Baccharis salicifolia 0% 3.1% 0% 0% Juncusacutus 66.9% 73% 100% 100% Salicornia virginica 22.7% 22.8% 54% 45.0% Scirpusrobustus 0% 0% 0% 0% Frankeniasalina 1.0% 1.5% 29.2% 4.3% Plucheaodorata 8.0% 0% 0% 0% Isocoma veneta 0.6% 0% 0% 0% Total 99.2% 77%% 183.2% 146.3% Table 13, Site D: Tree/Shrub Cover Summary of Site D 5th Year Monitoring With regard to the relatively low survival of several of the riparian tree species supplemental study was conducted at the request of Kurt Roblec (USFWS). This study is intended to enhance to poor representation of survival that can be inventoried by the transect above. The result of this inventory showed the following Species Number Extant in 2003 Baccharis salicifolia 132% Salix exigua 42% Salix lasiolepis 55% Salix gooddinggii 0% 2004 corrected 8.3% Table 14, Extant Plants in 2003 Native Landscape Inc. 28 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Since that study some Black willow (Salix nigra) that were hidden beneath other willow canopy (possibly early deciduous) corrected show a survival of Black willow of 8.3%. See Appendix C for details of this report. 3.0 DISCUSSION AND ANALYSIS OF PROJECT SUCCESS STANDARDS The success standards established for this project are primarily derived from the standards set in the Conceptual Wetlands Plan for Reaches I and 2 of the Cannon Road Extension Project (Tetra Tech 1997) and the addendum (Tetra Tech 1998). These standards are referred to indirectly in all project permits by reference to the requirement to execute fully all elements of the mitigation and monitoring plan. The mitigation plan differs from the permits as regards to cover standards. Cover success standards are designated slightly differently in project permits that require a 90 percent standard for final cover at the end of 5-years and set a three-year standard for 75% cover. The cover requirements designated in the permits however appear to refer to overall surface cover not just canopy cover. The present analysis defers to the permit requirements for cover but will interpret final standards to include 75% overstory and 90% total vegetative cover. I I I I I. I I I I P1 In addition, both the USFWS Biological Opinion and the CDFG Permits require that the habitat created be of vireo habitat quality (but do not set specific standards for this except to say that it has been occupied by vireos). Finally the CDFG permit specifies that newly created wetland vegetation must survive one summer dry season without irrigation to be considered successful. Generally, where a stricter standard applies this is the one that will be applied to evaluate project success; however, in some cases where standards contradict one another a choice is made for one standard over another (e.g. the dual requirements in the original monitoring program for both 80 percent and 95 percent survival of tree plantings). These success standards are summarized in Table 15. Four additional conditions are designated in the Biological Opinion to be completed before final project release: Pampas grass must be eradicated for a five-year period from the 28 acres of existing riparian woodland running from the mouth of Macario Canyon to the southern end of the South Mitigation Area summarized in last year's report. - Completed in 2002 A five-year least bell's vireo monitoring program must be conducted according to approved USFWS protocols and an annual report on this Native Landscape Inc. 29 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I I I I I I I I I effort provided to USFWS each year summarized in last year's report. - Completed in 2002 A five-year brown-headed cowbird-trapping program must be conducted in Macario Canyon according to approved USFWS protocols and an annual report on this effort provided to USWFS each year summarized in last year's report. - Completed in 2002 The completion of five-years of post-installation monitoring and maintenance for all mitigation areas. Site A (0.25 acre), C and D completing this year. Native Landscape Inc. 30 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Species Establishment All species planted Container Plant Survival 80% Final Tree Height Standards Fremont Cottonwood 10 feet Western Sycamore 9 feet Arroyo & Black Willows 11 feet Mulefat, Sandbar Willow, Mex. Elderberry, Arrow weed 6 feet Final Riparian Woodland Canopy Cover Standard 3-Years(This will also be 5-Year standard for canopy cover) 75% 5-Years(This includes all vegetative cover) 90% Least Bell's Vireo Occupied Habitat Completion of One Growing Season Without Irrigation Completion of 5-Year 28-Acre Pampas Grass Eradication Program Completion of 5-Year Least Bell's Vireo Monitoring Program Completion of 5-Year Brown-headed Cowbird Monitoring Program Completion of 5-Year Monitoring and Maintenance Program for all Sites. Table 15, Project Success Standards 3.2 DISCUSSION 3.2.1 Site A: Macario Canyon Fifth year monitoring report was submitted on September 29, 2003. 3.2.2 Site A: Additional 0.25 Acre Area Species establishment Table 2 shows all seeded species established except two; California sunflower and giant wild rye grass; however, the wild rye grass established from container plantings and the sunflower is established in the adjacent buffer zone. All species planted from containers also established by the end of the first growing season. The basic intent of species establishment of planted materials has been met at this site. I Native Landscape Inc. 31 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA fl I Container plant survival In spite of some dieback of Salix exigua and Baccharis salicifolia replacement I plantings are not recommended since the recruitment of Baccharis salicifolia is occurring in most of the barren areas and in the cleared area of the former road and buffer east of the 0.25 acre additional planting. Additional planting that would only replace these or necessitate resumption of irrigation are not recommended. I Final tree height standards Tree heights have reached the project standards as of 2001 monitoring even with a general decline due to drought and less watering of the site. Resumption of I growth of Baccharis salicifolia and Salix exigua in spite of continued drought have maintained minimum height standards. I Final canopy cover standard Canopy cover continues to progress toward permit goals. During the fifth year I canopy cover was 74.0%. Transect 1A has not re-colonized shrub cover though Giant Wild Rye is now slowly filling in this barren area. Except for some barren areas overall cover in the 0.25 acre mitigation area improved significantly I between 2003 and 2004. Vireo quality habitat The mulefat scrub habitat of this mitigation site is at the margin of the taller more I diverse riparian habitat of Site A. It is anticipated that it will continue to function as a foraging area for vireo and as a protective buffer to areas at Site A where I vireo were documented as nesting in 2003. Completion of one growing season without irrigation I This is the third growing season without irrigation. Conclusions I The site has achieved all final growth standards set by project permits; however, there are several areas where past herbivory and drought have left small barren areas. Such areas are not a significant percentage of the total vegetative cover I and are continuing to develop as annual rainfall allows expansion of riparian habitat. 3.2.3 Site C: El Camino Real Species establishment I Table 6 shows that all seeded species established in the riparian woodland part of this site except Yerba Mansa (Anemopsis californica). However, Yerba Mansa is not considered a dominant component of the understory at this site and it has I successfully invaded the site from adjacent populations along the edge of the saltmarsh part of this site. Table 6 also shows that all seeded species established in saltmarsh areas at this site; Brass Buttons, a non-native, has not I Native Landscape Inc. 32 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I I persisted in high numbers. Nevertheless, Freshwater encroachment continues to replace this salt marsh habitat. The combined habitats are closely approximate to the area of impact which was not subject to tidal fluctuations. Container plant survival Total container plant loss levels are well within the 80% standard therefore the site has met this success standard. I Final tree height standards Riparian woodland tree heights, permit goals and success standards are listed in I Table 15. Height data is not applicable to low growing saltmarsh plant species I Final canopy cover standard Canopy cover permit goals are shown in Table 15. Combined canopy cover for riparian woodland area is over 100%. Combined overstory, which is required to I be 90% by the end of the 5-year monitoring period has been met in the entire riparian woodland area. The establishment of an understory layer of perennial herb species such as Douglas wormwood has been largely shaded out of most of the riparian area by willows.. Combined canopy cover for saltmarsh areas was 116%. This is above the 90% I final cover set for canopy cover. This cover has a diverse mix of salt marsh species dominated by salt grass and woody glasswort. The encroachment of I Typha and other freshwater species has reduced the cover of the native species. Vireo occupied habitat I It is believed it was the intent of the mitigation permits to produce vireo quality habitat in Macario Canyon as a part of the final permit conditions for this site, but that because of the small size of the sites outside Macario Canyon (C &D) that I vireo occupancy is not a required part of final permit expectations. As a result no monitoring for vireo occupancy of either of these mitigation sites were required to be performed or reported on. I Completion of on growing season without irrigation Since irrigation has been withdrawn for four growing seasons, it has met this criteria for success. Conclusions This site achieved all final growth standards set by project permits. This riparian corridor has a dynamic character. As up stream development continues, it is anticipated the amount of freshwater into Agua Hedionda preserve will continue to increase. The only way to change or control the fresh water influx is to re- grade the preserve and that is not recommended in this high quality habitat (which is presumed to be occupied by LBV). I Native Landscape Inc. 33 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I I T The City of Carlsbad and California Department of Fish and Game are blocking maintenance trails to eliminate illegal site access. 3.2.4 Site D: Kelly Drive Species establishment Table 10 shows that all seeded species established in the riparian woodland planting area at this site except Yerba Mansa. The conceptual mitigation plan allows the monitoring biologist to change the plant palette as long as it is consistent with overall intent of mitigation design. Yerba Mansa is not considered important to understory development at this site. Container plant survival As determined in the supplemental survey (Appendix B), total container plant survival at the time was 57%, below the 80% standard for (Baccharis salicifolia, Salix exigua, Salix lasiolepis, and Salix gooddinggii) at this site. The survival of Mulefat alone is 132% due to the natural recruitment of new plants which have expanded the area of Mulefat scrub beyond the density of the original planting. The final 5th year botanical monitoring revealed that Black Willow did in fact have a low survival of 8.3% raising the overall riparian container survival to 59%. I Final tree height standards Riparian woodland tree heights met permit goals by the third year of monitoring. Mulefat (8 ft.) and sandbar willow (14 ft.) that achieved success height in 2002 & I 2003, respectively, have increased in height. Arroyo willow (11 ft.) achieved its final growth standard in 2001 and continues to increase in height. I No height data was gathered for the saltmarsh areas of this site. Height standards do not apply to herbaceous salt marsh plant species. I Final canopy cover standard Canopy cover has achieved permit goals during this fifth year of monitoring is shown in Table 12. Combined canopy cover for riparian woodland areas was I ,143%. Since the final cover standard of 90% includes understory and overstory coverage together, the final canopy cover standard has met success standards Average Canopy cover for saltmarsh areas was 138%. Vireo quality habitat I It is believed it was the intent of the mitigation permits to produce vireo quality habitat in Macario Canyon as a part of the final permit conditions for this site, but that because of the small size of the sites outside Macario Canyon (C &D) that I Native Landscape Inc. 34 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I I vireo occupancy is not a part of final permit expectations. As a result no monitoring for vireo occupancy of either of these mitigation sites was required or I reported on. Completion of on growing season without irrigation I Since irrigation has been withdrawn for three growing seasons, it has met this criteria for success. I Conclusions This site has achieved all final growth and cover standards set by project permits though container survival of riparian plant species remains deficient. However, I no further willow plantings are recommended because of the very limited area along the flood control channel where such plantings are likely to succeed is occupied with willow and mulefat cover. Baccharis salicifolia is successfully I supplementing willow cover at this site and is spreading throughout the riparian fringe. 4.0 RECOMMENDATIONS 4.1 SITE A: ADDITIONAL 0.25 ACRE MITIGATION AREA This site has achieved 74-78% shrub cover according to the annual transect data and other more extensive surveys. It is recommended that since the site continues to recruit new mulefat seedlings that cover goals will be met without additional plantings or the disruption that renewal of irrigation would have on the drought-hardened root systems of the existing riparian scrub. It is recommended that this site be released from maintenance and monitoring. 4.2 SITE C: EL CAMINO REAL It is recommended that this site be released from maintenance and monitoring. 4.3 SITE D: KELLY DRIVE It is recommended that this site be released from maintenance and monitoring. 4.4 RECOMMENDATIONS The city requests concurrence from the regulatory agencies that the city has fulfilled all of the requirements outlined in the regulatory permits. 5.0 FUNCTIONS AND VALUES This project has now been underway for six years, because of the staggered starting times 1998 and 1999 when 6.34 acres of created wetland were installed at Site A and Sites 0.25 acre A, C and D respectively. Native Landscape Inc. 35 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA These sites are all adjacent to three of the major freshwater tributaries that enter Agua Hedionda. The stabilization of riparian vegetation at these sites and establishment of a functional natural habitat at the perimeter of the lagoon are of significant ecological value. Habitats that are incorporated into these mitigation sites include: Open water habitat, brackish marsh, riparian scrub and southern willow scrub. Also there were areas at each of the sites where Diegan Coastal Sage Scrub was seeded at the upland area to stabilize the buffer areas bordering them. Some of the functions of naturally vegetated wetlands include: the improvement of water quality and flood control, providing for wildlife habitat, and as recreational access for public uses. These three mitigation sites fulfill all such functions. Although no water quality data is available from this monitoring program, mature Southern Willow Scrub habitat now occupy the banks of these three freshwater and storm run-off sites and function as sediment and nutrient traps protecting Agua Hedionda lagoon and contributing to its water quality. The habitat quality of riparian vegetation is much improved by the addition of 6.34 acres of created wetland that now enhances their capacity for wildlife and diversity of structure. Wetland creation of these sites restored "Disturbed Riparian Scrub" and farmland on the perimeter of the high value Southern Willow Scrub, which enhances the forage and cover attributes for such listed species which are known onsite as Least Bell's Vireo and California gnatcatcher and potentially for Southwest Willow flycatcher. A few other important bird species observed during routine monitoring are: Cooper's hawk, Red-tailed hawk, White- tailed kite, Peregrine falcon, Northern harrier, Lazuli bunting, Blue grosbeak, Red-wing blackbird, and Yellow-breasted chat. That the wildlife and vegetation of these sites are resilient permanent natural habitats is apparent by their survival and natural recovery without supplemental irrigation through a protracted and continuing drought. The girdling of Sandbar Willow, harvesting of Juncus acutis seed by animals and abundance of animal trails is evidence of its crucial function to local wildlife. Rapid recovery of the vegetation after these natural perturbations has been documented in these monitoring surveys. Future potential increases in freshwater by runoff and flood should be well accommodated by these habitats and re-nourish them through sediment and nutrient inputs and enhanced recharge of freshwater before it enters the lagoon. Native Landscape Inc. 36 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Appendix A, Observed Plant Species List APPENDIX A Cannon Road Extension Wetland Mitigation Sites Understory Species Site A: Macario Canyon Observed Family- Non- Seeded YRI YR 1 YR 2 YR 3 YR 4 YR 5 Scientific Name Native (S) Aug. Aug. Aug. Aug. Aug. Aug. Common Name (X) or 1998 1999 2000 2001 2002 2003 planted (P) ANGIOSPERMS (DIOCOTS Apiaceae- Carrot Family Arrium graveolens X * * * * * Common celery Foeniculum vulciare X Sweet fennel Asteraceae-Sunflower Family Ambrosia acanthicara X * Annual bur-sage * * Ambrosia psilostachya S * * * * * * Western ragweed Atremisia doucilasiana S * * * * * Mugwort Artemisia dracunculus S * * Tarragon * * * Aster exilis * * * * * Slim aster Baccharis salicifolia p * * * * * * Mulefat Conyzasp. X * * * * * Cotula coronopifolia X S * * * * * Brass buttons Euthamia occidentalis X Goldenrod * * Gnaphalium luteo-album X * * * * Lactucasp. X * * * * Wild lettuce Pluchea odorata S * * * * * Saltmarsh fleabane Pluchea sericea p * * * * * Arrow weed Picris echioides X * * * * * * Bristly ox-tongue I Sonchus oleraceus X * * * * Native Lanoscape Inc. 37 bill Annual Monitoring report Canon Rd. Extension wetland Mitigation Projects Prepared for City of Carlsbad, CA Sow thistle Xanthium strumarium X * * Spiny clotburr * * * Brassicacea - Mustard Family Brassica raa Field Mustard * Hirschfeldia incana * Brassica nigra Black mustard X * I * * * Site A: Macario Canyon con't. Coronopus didymus X Lesser wart-cress * * Lepidium nitidum X Shinning pepper grass * * Raphanus sativus X * Radish * Caroyphyllaceae—Pink Family Spergularia rubra X Ruby sand spurrey * * * Chenopodiaceae - Goosefoot Family Chenipodium ambrosioides X * Mexican tea * * * * * Chenipodium sp. X * * * * * Salicornia subterminalis p * * Parish's glasswort * * Salicornia virciinica p * Woody glasswort * * * Fabaceae - Pea Family Medicago polymorpha X * California burclover * * * * * Melilotus alba X White sweet clover * * * Fagaceae - Oak Family Quercus aQrifolia X Coast live oak * * * Frankenianceae Frankenia salina p * Alkali heath * * * * * Lythraceae - Loosestrife Family Ammania occinea X * Ammania Lythrum hyssopifolia X Hyssop loosestrife * * * * Malvaceae - Mallow Family Abutilon sp. X * Globe mallow * Native Landscape Inc. 38 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Malva parviflora X * Cheeseweed * * * Onagraceae-Evening Primrose Family Eøilobium adenocaulon * * * * * Potulacaceae - Buckwheat Family - Polycionum arehastrum X * Doorweed * * * Rumex crisDus X * Curly dock * * * * * Potulacaceae - Purslane Family Portulaca oleracea X Common purslane * * * Rosaceae - Rose Family Rosa californica p * California rose * * * * * Rubus ursinus California blackberry p Vitaceae- Grape Family Vitis qirdiana p * Desert grape * * * * * AGIOSPERMS (MONOCOTS) Cyperaceae - Cyperus Family CyDerus sp. X * sedge * * * * Scirpus robustus * Nutgrass * * * * * Poaceae - Grass Family Cortderia sellouana X Pampas grass * * * * * Cynodon dactylon X * Bermuda grass * * * * * Piptatherum milleacum * Millet ricegrass * * * Pennesetum setaceum X African fountain grass * * * Polypocion monspeliensis X * Annual beardgrass * * * Setaria sp. X * Bristlygrass * Vulpia myuros X S * Rat-tail fescue * * * Typhaceae - Cat- Tail Family Typha dominciensis * Southern cattail * * * * * Native Landscape Inc. 39 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA APPENDIX A Cannon Road Extension Wetland Mitigation Sites Site A Extra .25 Acre Area Understory Species Observed Family- Non- Seeded YR 1 YR 2 YR 3 YR 4 YR 5 Scientific Name Native (S) Aug. Aug. 'Aug. Aug. Aug. Common Name (X) or 2000 2001 2002 2003 2004 planted (P) ANGIOSPERMS (DIOCOTS Asteraceae-Sunflower Family Ambrosia psilostachya S * Western ragweed * * * * Atremisia douglasiana S * * * * * Mugwort Aster exilis * * * * Slim aster Baccharis salicifolia p * * * * * Mulefat Conyzasp. X * * * * * Encelia californica S * * California sunflower HedyDnois cretica X * * * * * Crete hedyonois Pluchea odorata * * * * * Saltmarsh fleabane Picris echioides X * * * * * Bristly ox-tongue Sonchus oleraceus X * * * * * Sow thistle Brassicacea - Mustard Family Chenopodiaceae - Goosefoot Family Chenipodium sri X * * * * * Euphorbiaceae - Spurge Family Eurphorbiaceae peplus X * * * * Petty spurge Fabaceae - Pea Family Medicacio polymorpha X California burclover * * * * Malvaceae - Mallow Family Malva parviflora X * * * * * Cheeseweed Native Landscape Inc. 40 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Polygonaceae - Buckwheat Family Polycionum arehastrum Doorweed X * Rumex crisius X Curly dock * * Saururaceae - Lizard - Tail Family AnemoDsis californica Yerba mansa * * AGIOSPERMS (MONOCOTS) Cyperaceae - Sedge Family ScirDus californica California bulrush * Poaceae - Grass Family Cynodon dactylon X Bermuda grass * * * * * Digitaria sp. X Crabgrass * Echinochloa crus-cjalli X * Common barnyard grass Leymus condensatus S, P Giant wild rye * * * * * Native Landscape Inc. 41 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA APPENDIX A Cannon Road Extension Site C: El Camino Real Wetland Mitigation Sites Understory Species Observed Family- Non- Seeded YR 1 YR 2 YR 3 YR 4 YR 5 Scientific Name Native (S) Aug. Aug. Aug. Aug. Aug. Common Name (X) or 2000 2001 2002 2003 2004 planted (P) ANGIOSPERMS (DIOCOTS) Apiaceae- Carrot Family Foeniculum vulgare X 5 rw rw rw rw rw Sweet fennel Asteraceae-Sunflower Family Atremisia palmerii S sm/rw 1W rw rw rw San Diego sagewort Aster exilis 5 sm/rw rw sm sm sm Slim aster Baccharis salicifolia p rw rw sm sm sm Mulefat Cotula coronopifolia X S sm sm sm sm sm Brass buttons Jaumea carnosa X sm sm sm sm sm Fleshy jaumea Pluchea odorata sm sm sm sm sm Saltmarsh fleabane Pluchea sericea P 1W 1W 1W 1W 1W Arrow weed Picris echioides X sm smlrw sm/rw sm/rw sm/rw Bristly ox-tongue Sonchus oleraceus X sm sm sm sm sm Sow thistle Caroyphyllaceae—Pink Family Spergularia rubra X sm sm sm sm sm Ruby sand spurrey Chenopodiaceae - Goosefoot Family Artiplex patula ssp. hastata S sm Fat hen sm sm sm sm Salicornia subterminalis sm Parish's glasswort P sm sm sm sm sm Salicornia_virciinica Native Landscape Inc. * 42 5th Annual Monitoring report Canon Rd. Extension Weliand Mitigation Projects Prepared for City of Carlsbad, CA Woody glasswort Fabaceae - Pea Family Lotus cornuculatus X rw Frankenianceae Frankenia sauna p Alkali heath sm sm sm sm sm Lythraceae - Loosestrife Family Lythrum hyssoDifolia X sm Hyssop loosestrife sm/rw sm/rw sm/rw sm/rw Malvaceae - Mallow Family Marvella leprosa Alkali mallow sm sm sm sm sm Plantaginaceae - Plantain Family Plantago maior X Common plantain sm/rw rw sm sm sm Polygonaceae - Buckwheat Family Rumex crispus X Curly dock sm rw sm/rw sm/rw sm/rw Sururaceae - Lizard - Tail Family Anemopsis californica S sm Yerba mansa sm sm sm sm Angiosperms (Monocots) Arecraceae - Palm Family Cyperaceae - Cyperus Family Scirpus robustua p Prairie bulrush sm sm/rw sm/rw sm/rw sm/rw Juncaceae - Rush Family Juncus acutus ssp. lepoldii p Southwest spiny rush sm sm sm sm sm Poaceae - Grass Family Cortderia sellouana X Pampas grass nw rw Cynodon dactylon X Bermuda grass sm sm sm sm sm Dicitaria sp. X Crabgrass sm Distichlis subspicata p Saltgrass sm sm sm sm sm Typhaceae - Cat- Tail Family Typha domingensis Southern cattail rw/sm rw/sm rw/sm rw/sm rw/ sm I Native Landscape Inc. 43 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I APPENDIX A Cannon Road Extension Wetland Mitigation Sites Site D: Kelly Drive Understory Species Observed Family- Non- Seeded YR 1 YR 2 YR 3 YR 4 YR 5 Scientific Name Native (S) Aug. Aug. Aug. Aug. Aug. Common Name (X) or 2000 2001 2002 2003 2004 planted (P) ANGIOSPERMS (DIOCOTS) Asteraceae-Sunflower Family Ambrosia acanthicarpa X sm Annual bur-sage rw/sm Aster exilis sm sm sm sm sm Slim aster Ambrosia psilostachya p rw/sm Western ragweed rw rw 1W rw Artemisia californica slope slope slope slope slope California sagebrush Artemisia doucjlasiana 5 rw/sm rw rw rw rw Mugwort Artemisia palmerli 5 sm rw San Diego sagewort Baccharis salicifolia p rw/sm nw nw nw nw Mulefat Encelia californica slope slope slope slope slope California sunflower Isocoma menziesii slope slope slope slope slope Coast golden bush Pluchea odorata sm sm sm sm sm Saltmarsh fleabane Picris echioides X sm sm/rw sm/rw sm/rw sm/rw Bristly ox-tongue Sonchus oleraceus X sm sm sm sm sm Sow thistle Xanthium strumarium X sm rw/sm rw/sm rw/sm rw/ sm Spiny clotburr Azioaceae - Fig - Marigold Family Carpobrotus edulis X sm rw/sm sm sm sm Sea-fig Boraginaceae - Borage Family Heliopium curvassavicum sm Salt heliotrope sm sm sm sm Caroyphyllaceae-Pink Family Sperciularia rubra X sm sm sm sm sm Ruby sand spurrey Chenopodiaceae - Goosefoot Family I Native Landscape Inc. 44 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA I Chenipodium sp. X sm sm sm sm sm Salicornia virginica p Woody glasswort sm sm sm sm sm Fabaceae - Pea Family Melilotus alba X White sweet clover sm rwlsm Frankeniaceae Frankenia salina p Alkali heath sm sm sm sm sm Lythraceae - Loosestrife Family Lvthrum hyssopifolia X Hyssop loosestrife sm rw/sm rw rw rw Juncaceae - Rush Family Juncus acutus ssp. Iepoldii S, P sm Southwest spiny rush sm sm sm sm AGIOSPERMS (MONOCOTS) Cyperaceae - Cyperus Family Cyperus sp. sedge X sm sm sm sm sm Scirpus robustus Prairie bulrush sm sm sm/rw sm/rw sm/rw Poaceae - Grass Family Cortderia sellouana X Pampas grass sm rw/sm Cynodon dactylon X Bermuda grass sm/rw rw/sm 1W rw rw Distichlis subspicata Saltgrass sm sm sm sm sm Piptatherum milleacum sm Millet ricegrass Pennesetum setaceum X African fountain grass sm Polypocion monspeliensis x sm Annual beardgrass sm sm sm sm Setaria sp. X Bristlygrass sm Vulpia myuros X Rat-tail fescue sm sm/rw sm/rw sm/rw Typhaceae - Cat- Tail Family Typha domingensis sm/rw Southern cattail rw rw rw rw Native Landscape Inc. 45 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Appendix B, Survey of Survival of Riparian Tree Species for Cannon Road Wetland Mitigation Area "D" at Kelly Drive and Park Drive Purpose: In response to questions from the U.S. Fish and Wildlife Service conveyed to Sheri Howard of the City of Carlsbad, Engineering Department, this survey was conducted. The purpose is to report on the container plant survival at Area D for completion of the Fifth Year Annual Monitoring Report to evaluate the final success criteria for this site. Scope: Container plants for the site included trees, shrubs for both Transitional Saltmarsh and Riparian Woodland habitat types. Saltmarsh habitat: With regard to the Saltmarsh habitat, the canopies of several salt marsh species have merged to the extent that individual plants can no longer be differentiated, therefore survival of the original plantings is no longer possible. The vegetative cover for this habitat exceeds 100%, comprised of three plant species Juncus acutis (Spiny Rush), Salicornia virginica (Pickleweed) and Frankenia sal/na (Alkali Heath). Those species that are not longer represented on the transect are abundant elsewhere in the saltmarsh [including: Scirpus robustus (Nut Sedge) and Isocoma veneta (Coast Goldenbush)], except for Pluchea odorata (Saltmarsh Fleabane), which is now infrequent on the site. Pluchea odorata is an annual or short-lived perennial herb that has little open habitat available for it to persist on the site. Riparian Woodland habitat: The diversity and survival of Riparian Woodland species was not well sampled in the data from the one transect of that has been used to monitor that habitat. An additional survey of these species' survival was undertaken as follows. Methods: To more accurately quantify the diversity and survival of the riparian tree and shrub species planted in that habitat, the most accurate sampling method was to make a complete count of the surviving trees in that habitat. Plants that were seedlings or recruits since the original planting were not counted, only those trees which were the approximate age or stature of 3-5 year- old plants were tallied and heights measured, since plantings were installed twice: 1998 and 2000. Results: The results are summarized in the following table: Plant Name Number Originally Planted Number Extant (2003) Percent Survival Baccharis salicifolia (Mulefat) 25 33 132% Salix exigua (Sandbar Willow) 60 25 42% Salix lasiolepis (Arroyo Willow) 110 60 55% Salix gooddinggii (Black Willow) 1 12 0 0% Native Landscape Inc. 46 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA Summarizing the results: There was poor survival of all three willow species. Salix exigua had a 38% deficit and Salix lasiolepis had a 25% deficit in maintaining the minimum success standard of 80% survival. No Salix gooddinggii were found of the 12 that were originally planted. Baccharis salicifolia has expanded from its original planting with 132% survival, which implies that roughly a quarter of the plants tallied had been from natural seedling recruitment probably from the first year after implementation. Observations: Willows nearest the flood control channel and in the flood plain in the southern portion of the site are those that have survived attaining tall stature. Salix lasiolepis has done considerably better than the other species. Baccharis saiicifólia has survived and grown to its full stature as well as initiated many new plants through seedling recruitment. In all areas of the site including the understory of the willow plantings, saltmarsh plants have become well established. In both cases it appears that high soil salinity has selected Saltmarsh as the most appropriate native vegetation that the site will support. Through some freshwater riparian tree and shrub species are tolerant of saline soil conditions, the areas of this site where riparian habitat will persist are mostly confined to the margin of the adjacent flood control channel. Past history of the site circa 1983 has been similar. The site had been previously planted entirely to Riparian Woodland mostly composed of Salix lasiolepis, but including Alnus rhombifolia (White Alder), Platanus racemosa (Wester Sycamore), Fraxinus velutina (Velvet Ash) and Populus fremontll (Western Cottonwood). Few of these original planting survived on the site. There is a limited area of the site that can successfully support freshwater Riparian Woodland. In this limited area willows have nearly closed canopy where vegetative cover is measured for annual monitoring. The amount of open or bare ground is rapidly diminishing as saltmarsh understory spreads into this portion of the site. Surviving willows that had been planted there are, themselves being crowded and overtopped by the willows that had been established. I Conclusions: Further willow planting is not recommended due to limited available space on the site where sufficient freshwater is available. Baccharis salicifolia is spreading by natural recruitment into available open areas where I they do occur. Supplemental plantings do not seem to be warranted since natural recruitment is occurring there. Any plants should be limited to such species that are successful. I I I Native Landscape Inc. 47 5th Annual Monitoring report Canon Rd. Extension Wetland Mitigation Projects Prepared for City of Carlsbad, CA : 'c 1 3LAimmim 7 - .'. s,' / •.- -. "----'.-S....I -. .-----.- -10 '• j. .te4s- 'S.',.. r• . / I. I All p "t 1Y '4 fi' , ' y AN Opt . • ' 1V "' 00 - ' I ¼V (k., ' !Z' 41 14 AL .41 M, r7w v n N & i•' •'\? t -. Al, I; •; . •:• ••p .,/,j•, I,! s, '.21,11 S - 1 1K1f K1" lea 41 - I t•- V-or /J".J(: • • ' /I.4t •' A, ad A : c'1 s'-\ ' I •• •- '•'&• • c.• S ,•Ig• • • . ..• t•. ;'.J,./1 'NA :l•!.. . - /\ •5 , ' • V.----- ,. ' •..' ' •'. • ' :'- '".• , t• ,.• ,•.• '-5- ,-1 . • ..,' TA / c.... ° LI.'SJ • lP:u S • •• .• '. f. .5 , S :;";. ...l. •"•'• ", p)..: .•'L•: ,'..I( :sjj j•• ',.; •. • f• . 11.1" . • Jvann& trivironmenic 92 1 kCä'iTrt - nn Dieno ..Cëilifnrnki: 921 rinuuvirii nii FR 13 2006 ENGINEERING DEPARTMENT FOURTH ANNUAL REPORT FOR THE CANNON ROAD EXTENSION PROJECT WETLAND MITIGATION FOR REACH 1 Prepared for: City of Carlsbad 1635 Faraday Avenue Carlsbad, California 92008 Submitted by: AMEC Earth & Environmental, Inc. 9210 Sky Park Court, Suite 200 San Diego, California 92123 (858) 300-4300 February 2006 Project No. 319721000-1007 City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 TABLE OF CONTENTS Page EXECUTIVESUMMARY ..........................................................................................................IV 1.0 INTRODUCTION............................................................................................................1 1.1 Project Location ..................................................................................................1 1.2 Project History.....................................................................................................1 1.3 Project Objectives ...............................................................................................4 2.0 SUCCESS STANDARDS...............................................................................................4 3.0 HORTICULTURAL MONITORING.................................................................................6 3.1 Seedling Establishment.......................................................................................6 3.2 Container Plant and Cutting Health.....................................................................7 3.3 Natural Recruitment...........................................................................................10 3.4 Irrigation ............................................................................................................. 12 3.5 Nonnative Plant Populations ..............................................................................12 3.6 Destructive Human Uses....................................................................................13 3.7 Pests and Diseases ...........................................................................................14 3.8 Wildlife Habitat Value ......................................................................................... 15 4.0 BOTANICAL MONITORING ........................................................................................15 4.1 Monitoring Methods............................................................................................16 4.2 Analysis of Botanical Monitoring.........................................................................17 4.2.1 Percent Cover ........................................................................................17 4.2.2 Tree Heights...........................................................................................17 5.0 RECOMMENDATIONS ................................................................................................20 5.1 Evaluation of Restoration Success.....................................................................20 5.2 Recommendations for Year 5.............................................................................20 6.0 REFERENCES.............................................................................................................21 LIST OF FIGURES Figure1 Regional Location Map ......................................................... ...................................... 2 Figure 2 Cannon Road Wetland Mitigation Site Location..........................................................3 Figure 3 Cannon Road Wetland Mitigation Site Photo Viewpoint Locations .............................8 Figure 4 Cannon Road Wetland Mitigation Site Transect Locations and Photograph Locations...................................................................................................................18 319721000-1007/R0106-003 Page i I I I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 LIST OF TABLES Table 1 Success Standards for the Cannon Road Wetland Mitigation Site..............................5 Table 2 Species Detected from the Seed Mix on the Cannon Road Wetland Mitigation Site2005....................................................................................................................7 Table 3 Container Plant and Cutting Mortality for Cannon Road Wetland Mitigation Site 2002 and 2003 ...........................................................................................................9 Table 4 Species Detected at the Cannon Road Wetland Mitigation Site 2001 through 2005..........................................................................................................................11 Table 5 Plant Species Cover of the Cannon Road Wetland Mitigation Site 2002 and 2003..........................................................................................................................19 Table 6 Average Heights of Container Plants for the Cannon Road Wetland Mitigation Site2002 through 2005.............................................................................................20 LIST OF APPENDICES APPENDIX A CORRESPONDENCE APPENDIX B PHOTO VIEWPOINT LOCATIONS FOR 2001 - 2005 APPENDIX C PHOTO DOCUMENTATION AT TRANSECT LOCATIONS 319721000-1007/R0106-003 Page ii I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 I I Cannon Road Extension Project Wetland Mitigation PROJECT TIMELINE Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2001 IC EC 2002 M R 2003 M. R ow , 2004 M R 2005 M R 2006 M RT = Completion of maintenance and monitoring period by AMEC to date IC = Completion of installation of the mitigation program EC = Completion of the 120-day establishment period and beginning of the 5-year maintenance and monitoring period M = Annual botanical monitoring A = Annual report due OW = Irrigation turned off AT = Final report and termination of the maintenance and monitoring period 319721000-1007/R0106-003 Page iii I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 I February 2006 EXECUTIVE SUMMARY I This is the fourth annual report of the wetland mitigation monitoring program for the temporary wetland impacts associated with the construction of Macario Canyon Bridge within Reach 1 of the Cannon Road Extension Project. AMEC Earth & Environmental, Inc. (AMEC) is the I biological consulting firm responsible for the 5-year monitoring of the wetland mitigation site. A total of 2.58 acres of southern willow scrub and freshwater marsh were temporarily impacted I during the construction of Macario Canyon Bridge. Of the 2.58 acres, approximately 0.68 acre was temporarily impacted during the construction of project access roads and staging areas. Another 1.9 acres were temporarily impacted during bridge construction and through the I shading of native riparian vegetation under Macario Canyon Bridge. The wetland mitigation site consists of a revegetated access road, the area underneath Macario Canyon Bridge, and a revegetated slope in the northeastern portion of the wetland mitigation site. All Year 4 success standards (e.g., vegetative cover, container plant and cutting survival, and tree heights) for the wetland mitigation site were achieved or surpassed in Year 2 (2003). Year 5 I .success standards have already been achieved for percent vegetative cover and survival of container plants and cuttings. Because of this, vegetative cover and container plant survival were not measured in Year 3 (2004) or Year 4 (2005). The Year 5 success standards for tree I heights were achieved this year for all tree species except the arroyo willows (Salix lasiolepsis). These were 2.5 inches short of Year 5 success criteria when they were measured in August 2005, but are expected to have reached these criteria by the end of Year 4. In addition, I some naturally recruited arroyo willows were likely counted as container plants during the tree height measurements. Due to successful natural recruitment throughout the site and the resulting difficulty of distinguishing natural recruits from container plants, this could have I artificially lowered the average container plant height that was measured. Therefore, this mitigation site is considered to have met or exceeded all of its Year 5 success standards. AMEC met with the resource agencies this year to request early sign-off of the site. The I resource agencies agreed to sign off the site, but requested that maintenance and monitoring of the site be continued through Year 5 to ensure the site's success. I The following measures are recommended for the site for Year 5 of the Cannon Road Extension Project wetland mitigation monitoring program: Continue to monitor the wetland mitigation site for nonnative, invasive plants and control/eliminate them as appropriate. '. Continue to monitor illegal usage of the wetland mitigation site by migrant workers, and discourage such use as appropriate. I Li I 319721000-1007/RO1 06-003 Page iv 1 I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 I February 2006 1.0 INTRODUCTION I This is the fourth annual monitoring report of the wetland mitigation monitoring program for the temporary wetland impacts associated with the construction of Macario Canyon Bridge in Reach 1 of the Cannon Road Extension Project in San Diego County, California (Figure 1). The I Cannon Road Extension Project consists of the construction of a four-lane arterial road from Car Country Drive to El Camino Real. The project is broken into two parts: Reach 1 and Reach 2. Reach 2 of the Cannon Road Extension Project, which will not be discussed in this report, I begins where Reach 1 meets. Faraday Avenue and extends east to El Camino Real (Figure 1). AMEC Earth & Environmental, Inc. (AMEC) is the biological consulting firm responsible for the 5-year monitoring of the wetland mitigation site. The project is authorized under the U.S. Fish and Wildlife Service (USFWS) Biological Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers (USACE) Permit Application No. 97-20130-TCD and 97-20131-TCD, City of Carlsbad (City), California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. 1.1 Project Location Reach 1 of the Cannon Road Extension Project and the wetland mitigation site associated with the construction of Reach 1 are located south of Agua Hedionda Lagoon between Interstate 5 and Faraday Avenue in Carlsbad, California (Figure 2). Reach 1 extends from Car Country Drive onto the mesa above Agua Hedionda Lagoon and traverses Macario Canyon near its confluence with the lagoon basin. Reach 1 of Cannon Road crosses Macario Canyon on Macario Canyon Bridge and continues on Cannon Road Reach 2. 1.2 Project History Installation of the wetland mitigation site began in January 2001 and was completed in March 2001. The 120-day maintenance period began the end of March 2001 and ended in July 2001. Valley Crest, the landscape maintenance contractor during this time, performed the installation and 120-day maintenance of the wetland mitigation site under the direction of the consulting firm Dudek and Associates (Dudek). The maintenance and monitoring period began in July 2001 following the inspection meeting on 23 July 2001. In August 2001, AMEC began monitoring the wetland mitigation site and Native Landscape, Inc. (Native Landscape), the landscape maintenance contractor, began maintenance of the wetland mitigation site. During Year 1, AMEC completed monthly horticultural monitoring visits and an annual botanical monitoring visit and submitted letter reports and the First Annual Report to the City. AMEC continued the same monitoring and reporting protocol during Years 2 through 4 as outlined in the Conceptual Wetland Mitigation Plan (Ogden 2000). This Fourth Annual Report summarizes all project- related activities and site progress during Year 4. Official project correspondence for the monitoring program is included at the end of this report (Appendix A). 319721000-1007/R0106-003 Page 1 I I H I I I I I I I 1 I [1 76 76 At pc;ansie, Vista \ RU \ ~bad Lco Escondido SANIV P", 0. F5VE 78 - •- -, • S6 78 . 'Encinitas-" ® / 61 - Poway felWaj7 56 - _: - ouios .s • - .'.Santee'- 4d . 7'•- .. ' ®—•--- - - - 52 61 - -• - 2 Legend • El Cajon * Project Location ' Die o • — - - ç_iry ® Major Cities t4—T La Mesa 12 County Boundary - .94 Rivers Lemon Grov1e' Current Freeways - . - •94 . • 75 Lakes and Ocean cj4oi1o.ci7 ® ational-Ciiy - • • . Map Notes C Projection: Stateplane (Zone 6), NAD83, Feet Chula V61a, Base Data: SANDAG - County Boundaries, Places SANDAG - Rivers, Lakes Caltrans Data: Current Freeways — — —Miles TIJUANA - 01/17106 FIG U RE Regional Location Map 1 .;-.*.;•J.I -t. r I :/sd03lbio/cannoniarvmap/sitc_Iocacion.mxd I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 1.3 Project Objectives A total of 2.58 acres of southern willow scrub and freshwater marsh were temporarily impacted during the construction of Macario Canyon Bridge. Of the 2.58 acres, approximately 0.68 acre was temporarily impacted during construction of project access roads and staging areas. Another 1.9 acres were temporarily impacted during bridge construction and through the shading of native riparian vegetation under Macario Canyon Bridge. The wetland mitigation site consists of a revegetated access road, the revegetated area underneath Macario Canyon Bridge, and a revegetated slope in the northeastern portion of the wetland mitigation site. The goal of the wetland mitigation program is to restore the site to preexisting riparian and wetland habitat functions and values. The overstory of the restored habitat is to be dominated by willows (Sallx sp.), mulefat (Baccharis salicifolia), and blue elderberry (Sambucus mexicana). The understory is to be dominated by arrow weed (Pluchea sericea), California wild rose (Rosa californica), California blackberry (Rubus ursinus), Douglas mugwort (Artemisia douglasiana), San Diego sagewort (Artemisia pa/men), western ragweed (Ambrosia psiostachya), yerba mansa (Anemopsis californica), Mexican rush (Juncus mexicanus), and great marsh evening- primrose (Qenothera elata ssp. hirsutissima). Maintenance and monitoring of the mitigation site are ongoing throughout each year of the project. Maintenance activities such as nonnative weed control occur at appropriate times of the year by the landscape maintenance contractor, Native Landscape. Qualitative horticultural monitoring occurs 12 times a year on a monthly basis in Years 1 and 2 and 8 times a year for Years 3 through 5. Botanical monitoring occurs annually to quantitatively assess the status of the wetland mitigation site with the success standards. Remedial measures are implemented in the fall or winter of each year or if a vegetation community is not satisfying interim performance goals and is considered to be deficient for achieving final success standards in Year 5. Success standards for the wetland mitigation site are outlined in the Conceptual Wetland I Mitigation Plan (Ogden 2000). The success standards are specific percentages of native plant cover, container plant and cutting survival, and tree heights to be achieved through the mitigation. The City will have achieved the goals outlined in the mitigation plan when these I success standards have been met for the wetland mitigation site. If the wetland mitigation site meets success standards before Year 5 and all parties agree, early acceptance of the project may be granted. 1 2.0 SUCCESS STANDARDS I Success standards are a set of yearly performance standards for evaluating the wetland mitigation site's progress. These success standards will be evaluated to determine when to implement remedial measures to correct deficiencies in project progress. The qualitative I horticultural monitoring data and quantitative botanical monitoring data collected will be analyzed against these success standards, which are outlined in Table 1. I I 319721000-1007/R0106-003 Page 4 City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 Table 1 Success Standards for the Cannon Road Wetland Mitigation Site Standard I Remedial Measure if Standard Not Met Year 1 50% visual ground cover Reseed/replant, substitutions possible Establishment of all species planted or seeded Reseed/replant, substitutions possible 90% healthy container plants Replace with same species/size 80% healthy cuttings Year 2 All trees of acceptable growth rate in height Mulch and/or fertilizer may be recommended by the restoration biologist 90% survival of tree container plants' 80% survival of shrub container plants' Replant with same species/size 80% survival of cuttings 70% total visual ground cover for all species Additional seed or container plants as recommended combined by restoration biologist Years 3 through 5 Height standards met for all trees Replant or receive remedial measures Tree Height Standards2 Year 3 Year 4 Year 5 Black willow (1 gallon) 8 10 12 Arroyo willow (1 gallon) 8 10 12 Narrow-leaved willow (1 gallon) 4 6 8 Blue elderberry (1 gallon) 4 5 6 90% survival of tree container plants' 80% survival of shrub container plants' Replant with same species/size 80% survival of cuttings 75% cover by all species in Year 33 0 i 3 8O/ cover by all species n Year 4 Additional seed or container plants as recommended by restoration biologist 90% cover by all species in Year 53 Irrigation will gradually be withdrawn from the mitigation area during Years 3 and 4. No further irrigation will be applied after Year 4. For the project to be considered successful, plants must survive one full dry season without supplemental irrigation. Ai me aiscretion 01 me restoration biologist, aeaci container plants can be mitigated tor by naturally invading seedlings, it such seedlings are within 5 feet of the original plants and of similar species or habitat value. 2 All heights given in feet. Cover of freshwater marsh species is acceptable in place of southern willow scrub species. 319721000-1007/R0106-003 Page 5 ' City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 3.0 HORTICULTURAL MONITORING I AMEC continued horticultural monitoring of the wetland mitigation site during Year 4 as outlined in the mitigation plan (Ogden 2000). Horticultural monitoring at the site included a qualitative assessment of the following parameters: seedling establishment, container plant and cutting I health, natural recruitment, irrigation, nonnative plant populations, destructive human uses, pests and diseases, and wildlife habitat value. I .Monitoring also included photo documentation of the wetland mitigation site. Representative locations, identified in Figure 3, were chosen to provide photographic overview of the wetland mitigation site's progress over the 5-year maintenance and monitoring program. These U photographs were taken during botanical monitoring visits in 2001 (immediately following installation of the mitigation), 2002, 2003, 2004, and 2005 (Appendix B). I The following section includes a discussion of each horticultural parameter followed by an overall assessment of the wetland mitigation site in relation to the parameter. U 3.1 Seedling Establishment Seedling germination and establishment are based on a variety of factors, including seasonal rainfall, aspect, soil disturbance, proximity to nonnative invasive plant species, seed viability, I and timing of seeding. Evaluation of this parameter includes identifying seedlings of the species included in the native seed mix and following their growth and establishment. Establishment of seeded species, both with respect to diversity and density of individual species, continues to be very good this year, with many seedlings developing into mature shrubs. The wetland mitigation site has progressed favorably in Year 4 with excellent native seedling I establishment and recruitment (see photo viewpoints in Appendix B). The density of seedlings observed during horticultural monitoring surveys has decreased compared to Years 1 through 3. This is anticipated, however, as seedlings that established during the first 3 years begin to I compete more effectively for limited resources (e.g., sunlight, water) and there is less unvegetated space for new seedlings to emerge. Nonnative and invasive species did not affect I seedling establishment in Year 4. The original seed mix used at the mitigation site included western ragweed, yerba mansa, Douglas mugwort, San Diego sagewort, mulefat, and great marsh evening-primrose. All of the I species from the original seeding efforts have established and were detected with the wetland mitigation site in Year 4 (Table 2). Many of the established plants from the seed mix were observed flowering and setting seed during Year 4, including Douglas mugwort, mulefat, and I western ragweed. Because of the native seedling success, no additional seeding was necessary during Year 4. I All species in the seed mix established in the wetland mitigation site in Year 1, thus satisfying the seedling establishment success criterion. There are no specific success standards established for seedling establishment in Year 4. I . I 319721000-1007/R0106-003 Page 6 I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 Table 2 Species Detected from the Seed Mix on the Cannon Road Wetland Mitigation Site 2005 Scientific Name Common Name Detected within the Site Ambrosia psilostachya western ragweed X Anemopsis call fornica yerba mansa X Artemisia douglasiana Douglas mugwort X Artemisia palmeri San Diego sagewort X Baccharis salicifolia mulefat X Juncus mexicanus Mexican rush Not planted Oenothera elata ssp. hirsutissima Evening-primrose X Nomenclature tollows Simpson and Rebman 2001. 3.2 Container Plant and Cutting Health The health of container plants and cuttings installed within the wetland mitigation site is visually assessed. If plants appear to be in poor health, remedial measures can be recommended. Dudek conducted a 120-day dead plant count in June 2001 and some dead container plants were replaced after this period. Approximately 1,074 one-gallon container plants and 513 cuttings were originally planted in the wetland mitigation site in January 2001. These included 45 Fremont cottonwood (Populus fremonti,), 100 narrow-leaved willow (Salix exigua), 158 black willow (Salix gooddingii), 175 arroyo willow (Salix lasiolepis), 62 blue elderberry, 184 mulefat, 42 arrow weed, 140 California wild rose, and 168 California blackberry container plants as well as 258 mulefat and 255 arroyo willow cuttings. Success standards For Years 3 through 5 required that 90 percent of tree container plants and 80 percent of shrub container plants and cuttings survive (Table 1); or no more than 10 percent mortality and 20 percent mortality, respectively, may occur. During October 2002 and 2003, all container plants and cuttings were counted to determine their survival at the end of Years 1 and 2. Container plants and cuttings (of both trees and shrubs) met and surpassed these criteria in Years 1 and 2 (Table 3). Therefore, the mitigation site achieved and surpassed all success standards for container plant and cutting survival associated with Year 5 and were not assessed again in Years 3 and 4 (AMEC 2003, 2004, 2005). I I I I I U P I I U I I I I 31972 1000-1007/R0106-003 Page 7 I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 I Table 3 Container Plant and Cutting Mortality for Cannon Road I . Wetland Mitigation Site 2002 and 2003 Mortality 2002 Mortality 2003 Cumulative Species Common Name Type Number Mortality Number Number Number Planted Dead Percent Dead Percent Dead Percent Baccharis salicifolia mulefat cuttings 258 13 5.0% 8 3.1% 21 8.1% Baccharis salicifolia mulefat 1-gallon 184 1 0.5% 0 0.0% 1 0.5% Pluchea sericea arrow weed liners 42 0 0.0% 0 0.0% 0 0.0% Populus fremontii Fremont cottonwood1-gallon 45 2 4.4% 4 8.9% 6 13.3% Rosa californica California wild 1-gallon 140 21 15.0% 3 2.1% 24 17.1% rose Rubusursinus California 1-gallon blackberry 168 30 17.9% 3 1.8% 33 19.6% Salixexigua narrow-leaved 1-gallon 100 2 2.0% 1 1.0% 3 3.0% willow Salixgooddingii black willow 1-gallon 158 5 3.2% 1 0.6% 6 3.8% Salixiasiolepis arroyo willow cuttings 255 15 5.9% 20 7.8% 35 13.7% Salix lasiolepis arroyo willow 1-gallon 175 4 2.3% 6 3.4% 10 5.7% Sambucus blue elderberry 1-gallon 62 2 3.2% 0 0.0% 2 3.2% mexicana Unknown 1-gallon 6 0 6 Total 1,587 101 6.4% 46 2.9% 147 9.3% Total Tree Container Plants 540 15 2.8% 12 2.2% 27 5.0% Total Shrub Container Plants 534 52 9.7% 6 1.1% 58 10.9% Total Cuttings 513 28 1 5.5% 1 28 5.5% 1 56 10.9% Another reason that container plants and cuttings were not counted or analyzed at the end of Year 3 (2004) or 4 (2005) is that the native, noncontainer and noncutting plants onsite I (e.g., native species that have come from past seeding efforts or natural recruitment) have been so successful that it has become impossible to accurately distinguish them from the container plants and cuttings onsite. In addition, the mitigation site success standards (Table 2) state the I following: "At the discretion of the restoration biologist, dead container plants can be mitigated for by naturally invading seedlings, if such seedlings are within 5 feet of the original plants and of similar species or habitat value." Given that there are so many established, naturally I recruited, native plants in the areas where the container plants and cuttings were installed, it is the judgment of AMEC biologists that if any container plants and/or cuttings sporadically died I 319721000-10071R0106-003 Page 9 I I I I I I I I I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 during Years 3 or 4, their value to the site has been fully mitigated by the seeded and naturally recruited plants onsite. 3.3 Natural Recruitment In addition to planting and seeding activities, plants establishing onsite can originate from several sources, including propagules that are transported to the site by wind, water, or animal vectors. Similarly, seeds may already occur in the soil prior to restoration activities. This natural recruitment plays an important role in increasing the diversity and density of native plant species within the restoration area. This is particularly true for this wetland mitigation site since it is surrounded by healthy, well-established upland and riparian native habitats that serve as potential source populations for incoming seed. Evaluation of this parameter involves identifying germinating seedlings or volunteers that were not included in the seed mix, as these species must have been naturally recruited. There is also likely natural recruitment as a result of seeding from native plants of the same species that were included in the seed mix and naturally occur outside the mitigation site, but this natural recruitment is not recorded because it cannot be distinguished from the seedlings resulting from past seeding efforts by biologists within the mitigation site. Natural recruitment can also occur when native species that are seeded or planted within an I area mature and produce seed on their own, thereby increasing the density of that particular species within the restoration area. A high number of native annual and perennial species produced seed this year within the wetland mitigation site, including mulefat, willow species, and I western ragweed. This continuing input of native seed contributes to the recruitment of native plant species across the wetland mitigation site. A total of 69 plant species have been observed at the wetland mitigation site through Year 4, including one new native species found this year, California sycamore (Platanus racemosa) (Table 4). This includes 46 native species, of which about half have colonized the site through natural recruitment. Species diversity is high for Year 4 and indicates the wetland mitigation site, as a whole, is performing well. The high diversity can be attributed to several factors: the presence of three vegetation associations (freshwater marsh, southern willow scrub, and coastal sage scrub) on and surrounding the wetland mitigation site, seeds from container plants and cuttings, seeds present in the soil, and seeds carried in from adjacent native habitats. Many obligate and facultative indicator wetland species not included in the seed mix were noted as occurring within the wetland mitigation site in the first annual report. These species, including alkali bulrush (Scirpus maritimus), small-fruited bulrush (Scirpus microcarpus), California bulrush (Scirpus californicus), spike rush (Eleocharis sp.), broad-leaf cattail (Typha latifolia), saltmarsh fleabane (Pluchea odorata), pickleweed (Salicornia virginica), southwestern spiny rush (Juncus acutus ssp. leopoldi,), and fireweed (Epiobium ciliatum spp. ciliatum), are naturally establishing, maturing, providing seed, and contributing to native cover and diversity in the wetland mitigation site. 319721 000-1007/R0106-003 Page 10 I I I I I I I I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 I I Table 4 Species Detected at the Cannon Road Wetland Mitigation Site 2001 through 2005 Scientific Name Common Name Ambrosia psiostachya western ragweed Anagallis atvensis scarlet pimpernel Anemopsis californica yerba mansa Apium graveolens wild celery Artemisia californica * California sagebrush Artemisia douglasiana* mugwort Artemisia palmeri* San Diego sagewort Atriplex semibaccata Australian saltbush Baccharis pilularis* coyote bush Baccharis salicifolia* mulefat Baccharis sarothroides* broom baccharis Brassica nigra black mustard Centaurea melitensis tocalote Chenopodium sp. pigweed Conium maculatum common poison hemlock Cortaderia selloana pampas grass Cotula coronopifolia African brass buttons Cyperus sp. sedge Deinandra fasciculata* tarplant Deinandra paniculata* tarplant Digitaria sanguinalis crab grass Eleocharis sp.* spike rush Encelia californica* California encelia Epilobium diiatum ssp. cilia tum* willow herb Eriophyllum con fertiflorum* golden yarrow Foeniculum vulgare wild fennel Gnaphalium sp. everlasting Gnaphalium bicolor* cudweed Gnaphalium californicum* California everlasting Heliotropium curassivicum* salt heliotrope Isocoma menziesir coastal goldenbush Juncus acutus ssp. Ieopoldii* southwestern spiny rush Lepidium latifolium perennial pepperweed Lotus scoparius* deerweed Lythrum hyssopifolium grass poly Marrubium vulgare horehound Me/lotus indica yellow sweet clover Nassella pulchra* purple needle grass Qenothera elata ssp. hirsutissima* great marsh evening-primrose Picris echioides bristly ox-tongue Plantago sp. plantain Platanus racemosa California sycamore Pluchea odorata* saltmarsh fleabane Pluchea sericea* arrow weed Polypogon monspeliensis rabbitfoot grass Popu/us fremontii* Fremont cottonwood Ricinus communis castor bean Rorippa nasturtiumaguaticum* water cress Rosa californica* I California wild rose 319721000-1007/R0106-003 Page 11 I I '11 I I I I I I I I I I I I I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 Table 4 Species Detected at the Cannon Road Wetland Mitigation Site 2001 through 2005 Scientific Name Common Name Rubus ursinus California blackberry Rumex crispus curly dock Salicornia virginica* pickleweed Salix exigua* narrow-leaved willow Salix gooddingii* black willow Salix IasioIepis* arroyo willow Salsola tragus Russian thistle Salvia mellifera * black sage Sambucus mexicana* Mexican elderberry Scirpus californicus* California bulrush Scirpus cernuus* California club-rush Scirpus maritimus* alkali bulrush Scirpus microcarpus * small-fruited bulrush Solanum xantr purple nightshade Sonchus asper prickly sow thistle Sonchus oleraceus common sow thistle Spergularia marina* salt marsh sand-spurry Tamarix sp. saltcedar Typha Iatifoiia* broad-leaf cattail Xanthium strumarium* I cocklebur Nomenclature follows Simpson and Rebman 2001. *Denotes plant species native to southern California. 3.4 Irrigation Irrigation is often supplied to restoration sites to encourage establishment and growth of vegetation and to ensure survival of seedlings and cuttings. Irrigation is usually supplied to a site during Years 1 through 3 and sometimes continues into Year 4 or 5 depending on the vegetative establishment and success at the site. Supplemental irrigation was used throughout the mitigation site to encourage plant growth and survival. Irrigation was turned off throughout a majority of the site on 1 June 2003 (Year 2) when it was deemed unnecessary for continued site success. Supplemental irrigation continued along the revegetated access road during most of Year 2 to discourage foot traffic and vagrancy. Supplemental irrigation was discontinued in this area on, 6 October 2003, as the dense vegetation occurring along the revegetated access road was sufficient to discourage illegal usage of the mitigation site. In summary, a majority of the mitigation site has been oft supplemental irrigation since 1 June 2003, and the entire mitigation site has been oft irrigation since 6 October 2003. The mitigation site has surpassed the success criteria for the vegetation to survive 1 full year with no supplemental irrigation (Table 1). 3.5 Nonnative Plant Populations Control of nonnative plant populations is one of the most important factors in the success of any restoration project because invasive and nonnative plants prevent the establishment of native species by competing with them for important resources (Bossard et al. 2000). Maintenance weeding concentrated on invasive weed species, such as bristly ox-tongue (Picris echioides), pampas grass (Cortaderia selloana), saltcedar (Tamarixsp.), and perennial pepperweed 319721000-1007/R0106-003 Page 12 I I n I I I I I I I I I F LI I I I I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 (Lepidium latifolium), which pose a threat to native plant establishment. Some nonnative plant species, such as rabbitfoot grass (Polypogon monspeliensis) and African brass buttons (Cotula coronopifolia), which are not considered invasive, were left in the wetland mitigation site. It was assumed, based on past experience, that these two species would not compete with the native riparian species in the wetland mitigation site and that,over time, they would not be a major component in the wetland mitigation site. Maintenance weeding was completed with manual and mechanical techniques, and appropriate herbicides were applied where deemed effective in the wetland mitigation site. Nonnative weed species were not a problem during Year 4, as they never composed a significant percentage of the mitigation site. Scattered perennial pepperweed plants resprouted in the wetland mitigation site in the beginning of Year 4 after some localized populations of these plants were hand-weeded and sprayed with herbicide toward the end of Year 3. However, Native Landscape continued to treat them and they were not detected again during Year 4. In addition, localized populations of bristly ox-tongue, prickly sow thistle (Sonchus asper), common poison hemlock (Conium maculatum), myoporum (Myoporum Iaetum), and pampas grass were detected onsite or immediately adjacent to the site during Year 4. These species were also controlled by Native Landscape periodically throughout Year 4 by a combination of mechanical weeding and spot spraying of herbicide. During the last site visit of Year 4, there were three small pampas grasses along the access road restoration area and two myoporum shrubs adjacent to the southern edge of the bridge restoration area that were marked and reported to Native Landscape for eradication. Nonnative plant species are not anticipated to become a problem within the mitigation site in the future because native cover is very well established and should be able to outcompete nonnative seedlings that may sprout onsite. 3.6 Destructive Human Uses During Year 1 monitoring, bicycle and motorcycle tracks were observed in the wetland mitigation site, creating trails and thereby injuring or killing vegetation. In addition, a homeless encampment had been established in the southern portion of the site. The City sent a representative to the homeless encampment several times to inform the inhabitant(s) to vacate the wetland mitigation site, and the encampment was eventually abandoned. Destructive human use of the wetland mitigation site was a major focus of City resources and attention during Year 2 of monitoring. Motorized and nonmotorized vehicle use has been eliminated due to the maturation of the vegetation within and adjacent to previously used trails. Although the homeless encampment was vacated in October 2002, usage of the southern terminus of the revegetated access road continued into early 2003. Migrant workers were using this portion of the wetland mitigation site to bathe and wash clothing. To discourage usage, the City extended existing fencing in this area and installed new fencing at the northern terminus of the access road where it merges with the remainder of the project area. Twenty 1-gallon southwestern spiny rush container plants were installed on 7 November 2003 along the extended fenceline in the southeastern corner of the project area. These plants are now established and healthy and would be painful to walk through, which discourages trespassers from bypassing the fence where it meets with vegetation. A small portion of the access road used for bathing and washing clothes was lowered in elevational grade to permit the pooling of water along currently utilized trails. In addition, the City posted signs in English and Spanish 319721000-1007/R0106-003 Page 13 I I I I I I I I I I I I I I I I I I I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 informing readers of the project area access restriction. The cumulative effect of these actions has led to the gradual abandonment of the mitigation site by former trespassers. No destructive human uses, including migrant worker activity, were observed within the mitigation area in Year 4, presumably due to the remedial measures implemented during Years 2 and 3. Due to these measures, as well as the high cover of mature vegetation present onsite, it is not expected that destructive human uses will resume in the future. 3.7 Pests and Diseases A number of animal or insect species can become pests within restoration sites if their populations are not controlled or measures are not initiated to reduce their effect. Similarly, some plant diseases can have a devastating effect if the symptoms are not identified early and remedial actions are not employed. Many of the pests and diseases observed in restoration sites are naturally occurring and are often seasonally fluctuating events. A proactive management program identifies and evaluates these issues, providing remedial measures when site success is jeopardized. Pests have continued to be a minor problem in Year 4, but are much less of a problem than in Years 1 and 2. Minor herbivory by rabbits and gophers utilizing the wetland mitigation site has occurred during Year 4. These mammals tended to favor narrow-leaved willow seedlings, saplings, and cuttings. However, no plant deaths were directly attributable to browsing by herbivores. Moreover, most of the vegetation in the mitigation site has matured to the point where the herbivory is negligible to the overall health of the site. Of greater concern is a persistent infestation of oyster-shell scale (Lepidosaphes u/mi) that broke out in Year 2 among willows and cottonwoods within the access road portion of the wetland mitigation site. Although scale species occur naturally throughout most riparian systems, heavy scale infestations have substantially reduced the health of many otherwise healthy willows along the revegetated access road, in some instances causing death. Plant-tek, a landscape pest management company, contained one outbreak of scale with the application of horticultural oil during spring 2003. Horticultural oil was used over chemical control methods as the required treatment coincided with the bird-breeding season. In fall 2003, scale were once again noticed on new growth of willows in the revegetated access road. The City contracted Plant-tek to spray the oyster-shell scale with Malathion, an organophosphate insecticide. This chemical was sprayed for mosquito abatement in lagoons in San Diego County and has been shown to have a short half-life and is relatively safe for application near nontarget organisms (e.g., birds, mammals). On 9 December 2003, Plant-tek applied Malathion directly to the infested trees, thereby minimizing the quantity of chemical released into the project area. The mitigation area was monitored for the success of the scale treatment over the remaining horticultural monitoring visits (January, February, April, May, and June 2004). Pesticide application is considered successful if the scale do not disperse from the locations where they were sprayed. The scale treatment appears to have been successful. During the horticultural monitoring visits in 2004, only two visits revealed some potential scale dispersal. Some extremely small and localized scale dispersals occurred on several willows along the revegetated access road. No 319721000-1007/R0106-003 Page 14 I I I I Li I I I I I I I Li I I I 5 I I I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 additional evidence of scale dispersals were found during the following June 2004 monitoring visit. Only minor occurrences of pests and diseases have been identified in the wetland mitigation site in 2005 and no additional corrective actions are recommended, as the City and AMEC applied pesticide several times to control/eliminate pests in the wetland mitigation site and the applications appear successful. In addition, the amount of mature native vegetation present in the wetland mitigation site at the end of Year 4 suggests that the habitat within the mitigation area is more robust and should be able to withstand small outbreaks of pests and/or diseases and continue to flourish. 3.8 Wildlife Habitat Value The quality of habitat within the wetland mitigation site has continued to improve during Year 4. The freshwater marsh component of the project area is at late-seral stage species composition and overall vegetative density. Through the growth of maturing container plants and high levels of natural recruitment, southern willow scrub habitat has become dense in many areas of the site. Although slower to develop, the revegetated coastal sage scrub area in the northeastern region of the project area has matured as expected and is well established. The overall wildlife habitat quality of the wetland mitigation site is moderate for open-habitat specialists and good to high for more closed-habitat specialists. The wetland mitigation site cover ranges from moderately dense with occasional openings in the revegetated access road to closed in the middle portion under the Macario Canyon Bridge. Common wildlife species using the wetland mitigation site include pacific treefrog (Hyla regilla), lesser goldfinch (Carduelis psaltria), mourning dove (Zenaida macroura), black phoebe (Sayornis nigricans), mice (Chaetodipus sp.), coyote (Canis latrans), raccoon (Procyon lotor), and bobcat (Fe/is rufus). Several sensitive wildlife species have also been using the site including coastal California g natcatche r (Polioptila californica californica), yellow-breasted chat (Icteria virens), least Bell's vireo ( Vireo be/Ill pusilus), white tailed kite (Elanus leucurus majusculus), red-tailed hawk (Buteo jamaicensis), and northern harrier (Circus cyaneus). Potentially suitable habitat exists onsite for southwestern willow flycatcher (Empidonax trail/ii extimus). Least Bell's vireo has been documented as nesting in Macario Canyon for the past several years (Ogden 2000). Least Bell's vireo have been heard or observed within or adjacent to the mitigation site during horticultural monitoring visits in 2003 and 2004 (AMEC 2004). During the 23 June 2005 horticultural monitoring survey, one least Bell's vireo was again heard calling near the mitigation site. 4.0 BOTANICAL MONITORING AMEC biologists modified the botanical monitoring survey methodology in Years 3 and 4 (compared to the previous 2 years of botanical monitoring) since all Year 5 success criteria had been met in previous years except tree heights. Only tree heights were measured this year since this was the only attribute that had not reached Year 5 success criteria. Most of the container trees within the mitigation site exceeded their Year 5 success standards for tree heights at the end of Year 2 (2003), with the exception of the arroyo willows, which fell short of the average tree height criterion by 7 inches (AMEC 2004). Because not all of the trees 319721000-1007/R0106-003 Page 15 I I I I H I I I I I 1 I I I I I I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 met the Year 5 success standards in Year 2, AMEC biologists measured and analyzed Year 3 tree heights in December 2004. Once again, most container trees met the Year 5 success I standards except for arroyo willows, which were short of the average tree height criterion by 5 inches this time (AMEC 2005). AMEC biologists measured and analyzed tree heights on 9 August 2005 to determine if all of the container trees have met the Year 5 success criteria yet. I Section 4.1 describes the monitoring methodology for the first 2 years (2002 and 2003) and the tree height monitoring transects for Years 1 through 4 (2002-2005). 4.1 Monitoring Methods Absolute percent cover data were not collected or analyzed for Years 3 and 4 for the reasons I discussed in Section 4.0. Absolute percent cover data were collected for Years 1 and 2. Six 30-meter by 3-meter belt transects were established in the same transect locations used in botanical monitoring for Year 1 (Figure 4). The transect locations were initially determined after I the mitigation site was established in 2001 by randomly choosing a number on the x- and y-axes for the beginning of each transect. Transects one and two are located on the revegetated access road. Transects three through six are located in the wetland mitigation site I underneath and adjacent to Macario Canyon Bridge. Transects three and four are on the east side of the wetland mitigation site. Transects five and six are on the west side of the wetland I mitigation site. To ensure transects could be relocated in future years, the origin and terminus of each transect were marked with 5-foot PVC pipe and labeled with pink flagging. Documentary photographs were taken from the beginning of each transect facing in the direction in which the data were collected in October 2002, October 2003, December 2004, and August 2005 I (Appendix C). AMEC used the line intercept method to measure absolute percent cover of all plant species I encountered along the transects. The linear extent to which each species intersected the transect was recorded directly into a handheld computer. All plant species were identified to I genus and species when possible. Absolute percent cover was calculated for the transects. Absolute cover measures the canopy cover of all layers of vegetation, taking into account the overlapping characteristics of many herbs, shrubs, and trees. Bare ground and litter were also l recorded. Absolute percent cover will be referred to as percent cover for the remainder of this report. The data were analyzed to provide total cover of native and nonnative species, including a breakdown by each species. To collect tree height data during Years 1 through 4, belt transects were established alongside the same transects used to collect percent cover. Three meters were measured on the east side I of the tape to create the belt transects on transects one and two and on the north side for transects three through six. All belt transects are 30 meters in length. All container trees within the belt transect were measured in meters using an 5K rod height pole. Pink flagging was tied I onto each tree that was measured so that the same trees could be measured in the future, although it is understood that sample size may still vary from year to year. The tree height data were analyzed to calculate average height. I I 319721000-1007/R0106-003 I Page 16 City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 I 4.2 Analysis of Botanical Monitoring I 4.2.1 Percent Cover Total percent cover in the wetland mitigation site increased from 100.9 percent at the end of I Year 1 to 115.4 percent at the end of Year 2 (Table 5). From Year 1 to Year 2, total native cover increased from 92.0 percent to 109.7 percent while total nonnative cover decreased from 8.8 percent to 5.8 percent (Table 5). Total percent cover for the wetland mitigation site I performed above the Year 5 success standard of 90 percent cover for Years 1 and 2 (Table 1). Year 5 success standards for absolute percent cover were met and surpassed in Years 1 and 2, and therefore it was not remeasured in Years 3 or 4. I Native vegetative cover is largely attributed to arroyo willow, broad-leaf cattail, California bulrush, and black willow. These species have readily colonized the wetland mitigation site. The majority of the nonnative cover (6.5 and 4.8 percent for Years 1 and 2, respectively) is I attributable to rabbitfoot grass, a noninvasive, nonnative, annual species. 4.2.2 Tree Heights I Tree height data for Year 4 were collected in August 2005. Average heights for container plants for Years 1 through 4 are presented in Table 6. For Year 4, the average height for planted I * mulefat container plants is 8.3 feet, the average height of narrow-leaved willow container plants is 13.9 feet, the average height of black willow container plants is 15.8 feet, the average height of arroyo willow container plants is 11.8 feet, the average height for Fremont cottonwood I container plants is 10.8 feet, and the average height of blue elderberry is 8.0 feet. For Year 4, most container plants outlined as having success standards (narrow-leaved willow, black willow, and blue elderberry) have already achieved the height success standard for Year 5. Though the I average height of arroyo willow container plants along the transects recorded in August 2005 was 2.5 inches short of the Year 5 goal, they are expected to reach the goal by the end of Year 4. In addition, some natural recruited arroyo willows were likely counted as container I plants during the tree height measurements this year because of successful natural recruitment throughout the mitigation project and the resulting difficulty of distinguishing natural recruits from I container plants, which could have artificially lowered the average container plant height. Fremont cottonwood and mulefat container plants do not have tree height success standards associated with them. 1 1 I I 319721000-1007/R0106-003 i Page 17 Transect-4 Photograph-i Transect-6 1 111~71RIAAI IN V 44 L7 Transect-i hotograph-1 Now Transect-3 I Transect-5 Photograph- Transect-2 Off Feet Legend 100 50 0 100 200 Photo Locations LS p Notes 30-Meter Transects NDAG- ODO 21 ot False Color Infra-red Imagery Mitigation Site Z:/5d03/bio/cannon/arcmaolTransecr location rnxd I I ameco . Cannon Road Wetland Mitigation Site Transect and Photograph Locations FIGURE I City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 Table 5 Plant Species Cover of the Cannon Road Wetland Mitigation Site 2002 and 2003 Scientific Name Common Name Absolute Cover (%) Year 1 (2002) Absolute Cover (%) Year 2 (2003) Salix lasiolepis arroyo willow 20.1% 28.3% Salix gooddingii black willow 8.3% 14.5% Typha latifolia broad-leaf cattail 12.1% 12.5% Scirpus californicus California bulrush 10.3% 9.8% Baccharis salicifolia mulefat 6.7% 9.1% Artemisia douglasiana Douglas mugwort 6.3% 8.0% Scirpus maritimus prairie bulrush 7.4% 6.3% Anemopsis californica yerba mansa 1.8% 5.5% Polypogon monspeliensis rabbitfoot grass 6.5% 4.8% Rubus ursinus California blackberry 1.6% 3.5% Salix exigua narrow-leaved willow 1.6% 2.9% Pluchea odorata saltmarsh fleabane 7.6% 2.7% Artemisia palmer! San Diego sagewort 0.4% 2.3% Ambrosia psilostachya western ragweed 2.5% 1.8% Oenothera elata ssp. hirsutissima great marsh evening- primrose 2.7% 0.6% Picris echioides bristly ox-tongue 2.3% 0.6% Juncus acutus ssp. leopold!i southwestern spiny rush 0.1% 0.6% Rosa californica California rose not detected* 0.4% Cotula coronopifolia brass buttons not detected* 0.3% Baccharispilularis coyote bush 0.01% 0.3% Pluchea sericea arrow weed not detected* 0.3% Scirpus sp. bulrush 0.7% 0.3% Eleocharissp. spikerush 1.3% 0.1% Apium graveolens celery not detected* 0.03% Heliotropium curassavicum salt heliotrope 0.5% 0.01% Sonchus oleraceus common sow thistle not detected* 0.01% Epiobium ciliatum willow herb 0.03% not detected* Salicornia virginica pickleweed 0.01% not detected* Bare ground Bare ground not calculated 23.1% Litter Litter not calculated 3.5% Percent Total Cover 100.9% 115.4% Percent Native Cover 92.0% 109.7% Percent Nonnative Cover 8.8% 5.8% Inalcates mat the species was not detected on the botanical monitoring transects for both Year 1 and Year 2. 319721000-1007/R0106-003 Page 19 City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 Table 6 Average Heights of Container Plants for the Cannon Road Wetland Mitigation Site 2002 through 2005 Average Tree Average Tree Average Tree Average Tree Scientific Name Common Name Height in Feet Height in Feet Height in Feet Height in Feet (Sample Size) (Sample Size) (Sample Size) (Sample Size) Year 1 Year 2 Year 3 Year 4 Baccharis salicifolia mulefat 6.0(25) 7.8(25) 9.0(21) 8.3(19) Salixexigua narrow-leaved willow 7.5(12) 12.2 (12) 11.6(6) 13.9(3) Salixgooddingii Gooddings black 9.0(18) 12.5 (21) 13.9(15) 15.8 (18) willow Salix lasiolepis arroyo willow 9.0(25) 11.4 (29) 11.6 (34) 11.8 (36) Populus fremontli Fremonts 6.3(8) 9.6(8) 9.1 (4) 10.8(1) cottonwood Sambucus mexicana blue elderberry 4.0(5) 7.3(7) 7.0(6) 8.0(3) 5.0 RECOMMENDATIONS 5.1 Evaluation of Restoration Success Vegetation has established well throughout the wetland mitigation site, meeting and exceeding Year 5 success standards for absolute percent cover. Adequate seed establishment, greater than expected natural recruitment, and perennial water flow through the project area have all contributed to this site's continued success. In addition, the wetland mitigation site has satisfied Year 5 success standards for container plant and cutting survival, and it is expected to satisfy Year 5 tree height success standards by the end of Year 4. Therefore, this mitigation site has met or exceeded all of its Year 5 success standards. I AMEC and the City met in the field with the USACE and USFWS representatives on 15 September 2005 and the CDFG representative on 15 December 2005 to discuss the success of the site. All of the resource agencies agreed that the mitigation site was successful and could be signed off early. However, they requested that maintenance and monitoring of the site be continued through Year 5 to ensure the site's success. 5.2 Recommendations for Year 5 The following measures are recommended for the site for Year 5 of the Cannon Road Extension I Project wetland mitigation monitoring program: Continue to monitor the wetland mitigation site for nonnative, invasive plants and control/eliminate them as appropriate. Treatment of nonnative, invasive plants is I recommended to occur quarterly for Year 5. Continue to monitor illegal usage of the wetland mitigation site by migrant workers, and I discourage such use as appropriate. 319721000-1007/R0106-003 I Page 20 City of Carlsbad Fourth Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 February 2006 6.0 REFERENCES AMEC Earth & Environmental, Inc. (AMEC). 2003. First Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1. January. AMEC Earth & Environmental, Inc. (AMEC). 2004. Second Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1. January. AMEC Earth & Environmental, Inc. (AMEC). 2005. Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1. March. Bossard, C.C., J.M. Randall, and M.C. Hoshovsky, editors. 2000. Invasive Plants of California's Wildlands. University of California Press, Berkeley, California. Ogden Environmental and Energy Services Co., Inc. 2000. Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California. July. Simpson, Michael G. and Jon P. Rebman. 2001. Checklist of the Vascular Plants of San Diego County. 3rd edition. SDSU Herbarium Press, San Diego, California. 319721000-1007/R0106-003 Page 21 Appendix A Correspondence 29 December 2004 Project No. 320741 000-1 001 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): First and Second Horticultural Monitoring Report for Year Four Dear Ms. Howard: I AMEC Earth & Environmental, Inc. (AMEC), submits this first and second letter report for year four of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project in Carlsbad, California:(July 2000). I The project is authorized under United States Fish and Wildlife Service Biological'Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California I .Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development 'Permit No. 6-97-11. According to the Wetland Mitigation Plan, horticultural monitoring visits and reports must be completed, monthly for the City of Carlsbad (City) and the landscape maintenance' contractor, I Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits must occur at a minimum of 8 times a year, and a horticultural monitoring report must be completed after each visit. On 12 November, AMEC natural resource specialist/botanist Jessie Vinje conducted the first horticultural monitoring visit and met with City project manager Sherri Howard to evaluate the restoration site. On 17 December, Jessie Vinje and AMEC wildlife biologist Daryl Trumbo conducted the second horticultural monitoring visit. In general, the restoration site is performing at or above all site success standards for year 5 as established by the Conceptual Wetland Mitigation Plan (Ogden 2000). Native vegetation is well developed throughout a majority of the restoration area and nonnative plants are relatively.few and. sparse in distribution. Additionally, many of the willows (Salix spp.) under the bridge have grown to between four and six meters in height. ' Only one invasive plant, pampas grass (Cortaderia spp.) was located during the second horticultural monitoring visit, but Native Landscape had recently sprayed it with herbicide. A low number of bristly ox- tongue (Picris echioides) seedlings were also located growing in the mitigation site, but Native Landscape had also sprayed them with herbicide. All of these nonnative plants appeared to be dead or dying from the herbicide application. AMEC will continue to monitor the site for nonnative plants and coordinate with Native Landscape to have them treated. :Many native seedlings were observed growing throughout the site and many species were flowering or setting seed. Most notably, many coyote brush (Baccharis pilularis), California mugwort (Artemisia. douglasiana), salt marsh fleabane (Pluchea odorata), arrow weed (Pluchea sericea) and pickleweed (Salicornia virginica) seedlings were observed growing throughout the site. I I 320741 000-1 0O1/3151-1204L069 Page 1 I I I I I I Ms. Sherri Howard City of Carlsbad 29 December2004 I Oystershell scale (Lepidosaphes u/mi), a small, inconspicuous insect, was observed on the new growth of I many willow species during late fall 2003. This scale is found naturally on riparian trees, but it can become problematic and even kill trees when a large number of them are present. This infestation was considered problematic due to the population density and was sprayed with a horticultural oil mixture to I .stop the spread of the scale. The scale has been controlled and no heavy infestations have been observed since the horticultural oil application. A minimal amount of scale dispersal was observed on some of the willows (Sa/ix spp.) and cottonwoods (Populus fremontii ssp. fremonti,), during the first and second horticultural visits, but overall, the trees are healthy and do not appear stressed by the scale that I is present. The trees are growing and establishing within the mitigation area despite the Scale. No additional horticultural oil treatment is recommended at this time. AMEC will continue to monitor this potential scale dispersal and the previously infested willows and cottonwoods for new evidence of scale. Migrant workers had been impacting vegetation and affecting water quality in the southern portion of the restoration site. No site impacts from trespassing were detected during either visit. AMEC and the City will continue to monitor migrant worker activity within the mitigation site. A section:of slope adjacent to the restoration site access road from Faraday Avenue had:-been eroding and depositing sediment along the access road and in a small portion of the restoration area adjacent to the access road. Native Landscape removed the depositional material from the access road and installed several rows of fiber rolls along the slope and at the base to deter the flow of water and sediment. Sediment is still being deposited into: the mitigation site, but at much lower levels. Additionally, this sediment deposition is not affecting the establishment and recruitment of plants within the mitigation site. Annual botanical monitoring was conducted in December 2004 and annual report for year three will be submitted in January 2005. If you have any questions, please call Jessie Vinje at (858) 458-9044, extension 264, or email at Jessica.vinje@amec.com. Sincerely, I Jessie Vinje; Natural Resource Specialist/Botanist AMEC Earth & Environmental, Inc. I .cc: Chris Fromme; Native Landscape, Inc. File I I I 320741000-1001/3151-1204L069 Page I I 31 March 2005 Project No. 319721000-1007 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension 'Project (Macario Bridge): Third Horticultural Monitoring Report for Year Four'. Dear Ms. Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this third horticultural letter report for year four of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of. the Cannon Road Extension Project in. 'Carlsbad, California (July 2000). The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-201 30-TCD and No. 97.20131 -TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, horticultural monitoring visits and reports must be completed monthly for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits, must occur at a minimum of 8 times a year, and a horticultural monitoring report must be completed after each visit. On 28 February 2005, AMEC natural resource specialist/botanist Jessie Vinje conducted the .third horticultural monitoring visit, and on 10 March 2005 Ms. Vinje met with City project manager Sherri Howard to evaluate the restoration site. In general, the restoration site is performing at or above all site success standards for year 5 as established by the Conceptual Wetland Mitigation Plan (Ogden 2000). Several pampas grass (Cortaderia spp.) plants were located during the second horticultural monitoring visit and were pulled by Ms. Vinje. Several perennial pepperweed (Lepidium IatifoIium) seedlings were also located during the 10 .March site visit, but had been sprayed with herbicide by Native Landscape. A high number of prickly sow-thistle (Sonchus aspe,) seedlings were also located growing in the mitigation site underneath Macario Bridge and just to the south of Macario Bridge during the 28 February-visit. AMEC noticed that during the 10 March site visit, Native Landscape had sprayed about half of the plants with herbicide, but about half had not been sprayed. Several poison hemlock (Conium maculatum) plants were also located on the I I I I I I I I I I I I 1 I I 1 E I Ms. Sherri Howard City of Carlsbad 31 March 2005 I I east side of the revegetated access road and had not been sprayed with herbicide. AMEC is recommending that Native Landscape revisit the site and treat the prickly sow-thistle and poison hemlock with herbicide. A new oystershell scale (Lepidosaphes u/mi) infestation was observed on some of the willows (Sa/ix spp.) located just south of Macario Bridge. This population had been documented adjacent to the mitigation site two years ago, but had not been observed dispersing into the I .. mitigation site. AMEC does not recommend treating this new population with pesticide atthis time since the population is small and most of the willow trees are large enough to withstand the infestation. I Migrant.workers had been impacting vegetation and affecting water quality in the southern portion of the restoration site. Nb site impacts from trespassing were detected during either I visit. AMEC and the City will continue to monitor migrantworker activity within the mitigation site. I A section of slope adjacent to the restoration site access road from Faraday Avenue has been eroding with the intense seasonal rains, and large amounts of sediment have been deposited along the access road and onto the restoration site adjacent to the access road. .AMEC recommends placing silt fence along the bottom of this slope to prevent further sediment I deposition onto the mitigation site. Additionally, large amounts of sediment have been deposited onto the mitigation site at the southern portion of the mitigation site along the I revegetated access road. This sediment deposition is a direct result of the rains washing sediment down the San Diego Gas and Electric (SDG&E) access road located south of the mitigation site. The rain washes'the sediment down this access road into the mitigation site. Sherri Howard recently contacted Mike Williams of SDG&E by email to discuss removal of the I sediment. AMEC will continue to monitor the mitigation site and coordinate with Native Landscape. If you I have any questions, please call Jessie Vinje at (858) 458-9044, extension. 264, or email at Jessica.vinje@amec.com. I Sincerely, Jessie Vinje; Natural Resource Specialist/Botanist AMEC Earth & Environmental, Inc. I, cc: Chris Fromme; Native Landscape, Inc. 1 File I 319721000-1007/3151-0504L033 I Page 2 I I. 7 July 2005 Project No. 319721000-1007 City of Carlsbad Engineering Department Ms. Sherri Howard 1635 Faraday Avenue Carlsbad, CA 92008 I 'Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): Fifth and Sixth Horticultural Monitoring Report for Year Four Dear Ms.Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this fifth and sixth horticultural letter report for year four of the horticultural monitoring program 'in accordance with the Conceptual Wetland 'Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project in Carlsbad, California (July 2000). The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-lCD and No. 97-20131-TCD, City of Carlsbad, 'California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, horticultural monitoring visits and reports must be completed monthly for the City of Carlsbad (City) and the landscape maintenance 'contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits must occur at a minimum of 8 times a year, and a horticultural monitoring report must be completed after'each Visit. On 10 and 23 June 2005, AMEC natural resource specialist/botanist Jessie Vinje conducted the fifth and sixth horticultural monitoring visits. Sherri Howard from the City of Carlsbad accompanied Ms. Vinje on the 10 June visit and Ms. Howard and Chris Fromme of -Native Landscape accompanied Ms. Vinje on the 23 June visit. Ms. Vinje walked the site with Mr.. Fromme to show him all of the exotic plant species of concern. During the 10 June, visit Ms. Vinje noted that the perennial pepperweed (Lepidium latifolium) and poison hemlock (Conium maculatum) populations had been completely removed as specified by Ms. Vinje in the last horticultural report. Most of the prickly sow thistle (Sonchus asper) and bristly ox-tongue (Picris echioides) had been either removed by hand or had been 'treated with herbicide. It appeared that the majority of the site had been walked by the Native AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel 1 (858) 458-9044 w:\2005\Projects\319721000-1007_city-carlsbad\.App_A_cannon Road Hort Report 5 Fax 1 (858) 458-0943 and 6 Year 4.doc :.amec.com Page 1 I I I I 1 I 1 I I 1 I 1 1 I Ms. Ms. Sherri Howard City of Carlsbad Engineering Department 7 July 2005 Landscape maintenance crew and treated for weeds. Ms. Vinje made sure to inform him that I the entire site should be walked to detect any weed species that may be growing on the site. It is recommended that Native Landscape spray the small to medium sizedmyoporum (Myoporum Iaetum) shrubs with herbicide that occur on the boundary of the mitigation site just south of the Macario Bridge. Some minor oystershell scale (Lepidosaphes u/mi) infestation was noted in several new areas I throughout the mitigation site, but do not appear to be a potential threat to the success of the mitigation site any longer since the trees/shrubs in the site have reached a maturity level at -which the scale would not kill them. The site continues to progress well and should meet all of the success standards set for Year S. Vegetative cover and plant species diversity are both extremely high. Many wildlife species use I the site and a least Bell's vireo ( Vireo be//li pusillus) was heard calling again during the sitevisit. AMEC will continue to monitor the mitigation site and coordinate with Native Landscape. If you have any questions, please call Jessie Vinje at (858) 458-9044, extension 264, or email at I Jessica.vinje@amec.com. 1 Sincerely, I I Jessie Vinje; Natural Resource Specialist/Botanist AMEC Earth & Environmental, Ind. cc: Chris Fromme; Native Landscape, Inc. i • File • 322012000-1001/App_A_Cannon Road Hort Report 5 and 6 Year 4.doc Page 2 I I 18 August 2005 Project No. 319721000-1007 City of Carlsbad Engineering Department Ms. Sherri Howard 1635 Faraday Avenue Carlsbad, CA 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension' Project (Macario I Bridge): Seventh and Eighth Horticultural Monitoring Report for Year Four Dear Ms.Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this seventh and eighth (final) horticultural I letter report for year four of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road. Extension Project in Carlsbad, California (July 2000). The project is authorized under United I States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) I Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, horticultural I monitoring visits and reports must be completed monthly for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years-one and two of the Cannon Road Extension Project. For years three though five, horticultural 'monitoring visits must occur at a minimum of 8 times a year, and a horticultural monitoring 'report must be completed after each visit. On 28 July 2005, AMEC natural resource specialist/botanist Jessie Vinje conducted the seventh I horticultural monitoring visit and on 9 August 2005, AMEC wildlife biologist, Daryl Trumbo conducted the eighth and final horticultural monitoring visit and the Year 4' botanical monitoring (only consisted of measuring tree heights). I . During both visits, AMEC noted that the perennial pepperweed (Lepidium 'latifolium) and poison 'hemlock (Conium maculatum) populations had not returned. It appears that the perennial I pepperweed infestation has been eradicated; however, the area should still be monitored for any sprouting individuals. Three small pampas grass (Cortaderia sp.) plants were located growing along the access road. Green flagging was tied onto adjacent willow trees to help guide Native Landscape in their eradication of these individuals. Additionally, two myoporum AMEC Earth & Environmental, Inc. I 5510 Morehouse Drive 'San Diego, CA 92121 Tel 1 (858) 458-9044 W.\2005\Projects\319721000-1007_City-carlsbad\App_A_Cannon Road Hort Report 7 Fax 1 (858) 458-0943 and 8 Year 4.doc www.amec.com Page 1 I I I I I I Ms. Sherri Howard City of Carlsbad Engineering Department 18 August 2005 (Myoporum Iaetum) plants were observed south of Macario Bridge and west of the restored access road growing on the boundary of the restoration site. It was recommended in the last horticultural report that these shrubs be sprayed with herbicide. It did not-appear that these shrubs had been sprayed with herbicide. AMEC is recommending that the pampas grass plants be pulled by hand, since they are so small and that the myoporum shrubs be removed mechanically and the stumps sprayed with herbicide. Some minor oystershell scale (Lepidosaphes ulmi) infestation was noted in several new areas throughout the mitigation site, and it did appear that one willow (Salix sp.) may have possibly died as a result of the heavy scale infestation noted on the stems and trunk. Vegetative cover and plant species diversity are both very high. Overall, the site continues to progress extremely well and all of the Year 5 success standards for the site have been achieved. I .AMEC will continue to monitor the mitigation site and coordinate with Native Landscape. If you have any questions, please call Jessie Vinje at (858) 458-9044, extension 264, or email at Jessica.vinje@amec.com. Sincerely, I Jessie Vinje; Natural Resource Specialist/Botanist AMEC Earth & Environmental, Inc. I cc Chris Fromm- Mqfivp I inr r'clnA )ad Hort Report 7 and 8 Year 4.doc Page 2 I I I I I I Appendix B I Photo Viewpoint Locations for 2001 -2005 I I I I I I I I I I II .10.232002 I - •.1 I• -._____: Viewpoint IA - 2002 Viewpoint IA - 2001 II. Viewpoint IA - 2003 Viewpoint IA - 2004 Viewpoint IA - 2005 I amec Graph i2/3151/319721000_i 007—Cannon Road/Appendix B 2001/ Viewpoint lAThS Cannon Road Wetland Mitigation Site Photograph Viewpoints 2001 - 2005 APPENDIX B.i Ill F-- t - \ -- Viewpoint I B - 2002 '-- 1O232OO2- Viewpoint I B - 2003 - // Viewpoint I B - 2004 Viewpoint 1 -2005 • Graphics2/3151/319721000_1007_Cannon Road/Appendix B 2001/ Viewpoint 1B.th8 Cannon Road Wetland Mitigation Site Photograph Viewpoints 2001 - 2005 APPENDIX 4 / I • -I 4If •'• •• •; ' M4W% S N - - -• ')• •- .. 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Tff; AI 0 D•. 01 THIRD ANNUAL REPORT FOR THE CANNON ROAD EXTENSION PROJECT WETLAND MITIGATION FOR REACH 1 Prepared for: City of Carlsbad 1635 Faraday Avenue Carlsbad, California 92008 Submitted by: AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, California 92121 (858) 458-9044 23 March 2005 Project No. 319721000-1007 II City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 TABLE OF CONTENTS ' Page EXECUTIVE SUMMARY ..........................................................................................................Iv I, 1.0 INTRODUCTION............................................................................................................1 1.1 Project Location ..................................................................................................1 ' 1.2 Project History.....................................................................................................1 1.3 Project Objectives ...............................................................................................4 I 2.0 SUCCESS STANDARDS...............................................................................................4 3.0 HORTICULTURAL MONITORING ................................................................................. 6 I 3.1 3.2 Seedling Establishment.......................................................................................6 Container Plant and Cutting Health.....................................................................8 1 3.3 3.4 Natural Recruitment..........................................................................................10 Irrigation ............................................................................................................ 10 3.5 Nonnative Plant Populations .............................................................................13 1 3.6 Destructive Human Uses...................................................................................13 3.7 Pests and Diseases ..........................................................................................14 rn 3.8 Wildlife Habitat Value........................................................................................15 4.0 BOTANICAL MONITORING ........................................................................................16 I 4.1 Monitoring Methods ........................................................................................... 16 4.2 Analysis of Botanical Monitoring ........................................................................ 18 4.2.1 Percent Cover .......................................................................................18 1 4.2.2 Tree Heights..........................................................................................18 5.0 RECOMMENDATIONS.................................................................................................20 1 5.1 Evaluation of Restoration Success....................................................................20 5.2 Recommendations for Year Three.....................................................................20 1 6.0 REFERENCES ................................... .......................................................................... 21 LIST OF FIGURES Figure 1 Regional Location Map ............................................................................................... 2 I Figure 2 Cannon Road Wetland Mitigation Site Location ........................................................... 3 Figure 3 Cannon Road Wetland Mitigation Site Photo Viewpoint Locations .............................7 Figure 4 Cannon Road Wetland Mitigation Site Transect Locations and Photograph I Locations .................................................................................................................. 17 1' I' 319721000-1007/R0205-008 Page City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach I 23 March 2005 LIST OF TABLES Table 1 Success Standards for the Cannon Road Wetland Mitigation Site..............................5 Table 2 Species Detected from the Seed Mix on the Cannon Road Wetland Mitigation Site2004....................................................................................................................8 Table 3 Container Plant and Cutting Mortality for Cannon Road Wetland Mitigation Site 2002 and 2003...........................................................................................................9 Table 4 Species Detected at the Cannon Road Wetland Mitigation Site 2001 through 2004.........................................................................................................................11 Table 5 Plant Species Cover of the Cannon Road Wetland Mitigation Site 2002 and 2003.........................................................................................................................19 Table 6 Average Heights of Container Plants for the Cannon Road Wetland Mitigation Site 2002 through 2004............................................................................................20 LIST OF APPENDICES APPENDIX A CORRESPONDENCE APPENDIX B PHOTO VIEWPOINT LOCATIONS FOR 2003 AND 2004 APPENDIX C PHOTO DOCUMENTATION AT TRANSECT LOCATIONS 319721 000-1 007/R0205-008 Page ii City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 Cannon Road Extension Project Wetland Mitigation PROJECT TIMELINE ,sII fl iI zsII fl zsIsI I_,_ D= Completion of maintenance and monitoring period by AMEC to date IC = Completion of installation of the mitigation program EC = Completion of the 120-day establishment period and beginning of the 5-year maintenance and monitoring period M = Annual botanical monitoring A = Annual report due OW = Irrigation turned off AT = Final report and termination of the maintenance and monitoring period 319721000-1007/R0205-008 Page iii City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 EXECUTIVE SUMMARY I This is the third annual report of the wetland mitigation monitoring program for the temporary wetland impacts associated with the construction of Macario Canyon Bridge within Reach 1 of I the Cannon Road Extension Project. AMEC Earth & Environmental, Inc. is the biological consulting firm responsible for the 5-year monitoring of the wetland mitigation site. A total of 2.58 acres of southern willow scrub and freshwater marsh were temporarily impacted during the construction of Macario Canyon Bridge. Of the 2.58 acres, approximately 0.68 acre was temporarily impacted during the construction of project access roads and staging areas. Another 1.9 acres were temporarily impacted during bridge construction and through the shading of native riparian vegetation under Macario Canyon Bridge. The wetland mitigation site consists of a revegetated access road, the area underneath Macario Canyon Bridge, and a revegetated slope in the northeastern portion of the wetland mitigation site. All year three success standards (e.g., vegetative cover, container plant and cutting survival, and tree heights) for the wetland mitigation site were achieved or surpassed in year two (2003). Year five success standards have already been achieved for percent vegetative cover and survival of container plants and cuttings. Because of this, vegetative cover and container plant survival were not measured again in year three (2004). The year five success standards for tree heights were achieved in year three for all trees except for arroyo willow (Salix lasiolepis). Arroyo willow trees are 4 inches short of reaching the year five success standards: The following remedial measures are recommended for the site for year four of the Cannon Road Extension Project wetland mitigation monitoring program: I . Continue to monitor all areas infested with oyster-shell scale. Respray with Malathion if new infestations are located and/or old infestations remain problematic. Continue to monitor the wetland mitigation site for nonnative, invasive plants and .I control/eliminate them as appropriate. Treatment of nonnative, invasive plants is recommended to occur quarterly for year four. Continue to monitor illegal usage of the wetland mitigation site by migrant workers. I I I I 31972 1000-1007/R0205-OO8 Page iv City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 1.0 INTRODUCTION This is the third annual monitoring report of the wetland mitigation monitoring program for the temporary wetland impacts associated with the construction of Macario Canyon Bridge in Reach 1 of the Cannon Road Extension Project in San Diego County, California (Figure 1). The Cannon Road Extension Project consists of the construction of a four-lane arterial road from Car Country Drive to El Camino Real. The project is broken into two parts: Reach 1 and Reach 2. Reach 2 of the Cannon Road Extension Project, which will not be discussed in this report, begins where Reach 1 meets Faraday Avenue and extends east to El Camino Real (Figure 1). AMEC Earth & Environmental, Inc. (AMEC) is the biological consulting firm responsible for the 5-year monitoring of the wetland mitigation site. The project is authorized under the U.S. Fish and Wildlife Service (USFWS) Biological Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers (ACOE) Permit Application No. 97-20130-TCD and 97-20131-TCD, City of Carlsbad (City), California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement' No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0.5); and California Coastal Commission Coastal Development Permit No. 6-97-11. 1.1 Project Location Reach 1 of the Cannon Road Extension Project and the wetland mitigation site associated with the construction of Reach 1 are located south of Agua Hedionda Lagoon between Interstate 5 1. and Faraday Avenue in Carlsbad, California (Figure 2). Reach 1 extends from Car Country Drive onto the mesa above Agua Hedionda Lagoon and traverses Macario Canyon near its confluence with the lagoon basin. Reach 1 of Cannon Road crosses Macario Canyon on Macario Canyon Bridge and continues on Cannon Road Reach 2. 1.2 Project History Installation of the wetland mitigation site began in January 2001 and was completed in March 2001. The 120-day maintenance period began the end of March 2001 and ended in July 2001. Valley Crest, the landscape maintenance contractor during this time, performed the installation and 120-day maintenance of the wetland mitigation site under the direction of the consulting firm Dudek and Associates (Dudek). The maintenance and monitoring period began in July 2001 following the inspection meeting on 23 July 2001. In August 2001, AMEC began monitoring the wetland mitigation site and Native Landscape, Inc. (Native Landscape), the landscape maintenance contractor, began maintenance of the wetland mitigation site. During year one, AMEC completed monthly horticultural monitoring visits and an annual botanical monitoring visit and submitted letter reports and the First Annual Report to the City. AMEC continued the same monitoring and reporting protocol during years two and three as outlined in the Conceptual ;. Wetland Mitigation Plan (Ogden 2000). This Third Annual Report summarizes all project-related activities and site progress during year three. Official project correspondence for the monitoring program is included at the end of this report (Appendix A). - 319721000-1007/R0205-008 Page 1 C I 76 ceanside /Vista \ ' BUE,°' \ \\ DO \ San Ma cos Carlsbad scondido A \ cc / \\\ M c0T'' J ' OR?VE Encinitas - .11s I -- each S lb S6 - Powa e-11 ar 67 52 ro El n Legend Project Location 163 'esa Major Cities te 12 County Boundary Le on42rove I- Rivers \j ) Current Freeways . - - - - Lakes and Ocean PoJonadoi\ ational City 94 __________________________ •: , Map Notes Chula Vista Projection: Stateplane (Zone 6), NA083. Feet '• C - , - . .- Base Data: SANDAG -County Boundaries, Places SANDAG - Rivers, Lakes N CaJtrans Data: A - - :- Current Freeways - - —Miles B o ---. - -. TIJUAINA 012345 a - J:/gisl4/cannon/arcmap/regional_Iocation.mxd 03/21/05 FIGURE I amed Regional Location Map 1 HidL'agoon City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 1.3 Project Objectives A total of 2.58 acres of southern willow scrub and freshwater marsh were temporarily impacted during the construction of Macario Canyon Bridge. Of the 2.58 acres, approximately 0.68 acre was temporarily impacted during construction of project access roads and staging areas. Another 1.9 acres were temporarily impacted during bridge construction and through the shading of native riparian vegetation under Macario Canyon Bridge. The wetland mitigation site consists of a revegetated access road, the revegetated area underneath Macario Canyon Bridge, and a revegetated slope in the northeastern portion of the wetland mitigation site. The goal of the wetland mitigation program is to restore the site to preexisting riparian and 1 wetland habitat functions and values. The overstory of the restored habitat is to be dominated by willows (Salix sp.), mulefat (Baccharis salicifolia), and blue elderberry (Sambucus mexicana). I The understory is to be dominated by arrow weed (Pluchea sericea), California wild rose (Rosa californica), California blackberry (Rubus ursinus), Douglas mugwort (Artemisia douglasiana), San Diego sagewort (Artemisia palmer,), western ragweed (Ambrosia psiostachya), yerba mansa (Anemopsis caifornica), Mexican rush (Juncus mexicanus), and great marsh evening- primrose (Qenothera elata ssp. hirsutissima). Maintenance and monitoring of the mitigation site are ongoing throughout each year of the project. Maintenance activities such as nonnative weed control occur at appropriate times of the - year by the landscape maintenance contractor, Native Landscape. Qualitative horticultural J monitoring occurs 12 times a year on a monthly basis in years one and two and 8 times a year for years three through five. Botanical monitoring occurs annually to quantitatively assess the status of the wetland mitigation site with the success standards. Remedial measures will be I implemented in the fall or winter of each year or if a vegetation community is not satisfying interim performance goals and is considered to be deficient for achieving final-success standards in year five. Success standards for the wetland mitigation site are outlined in the Conceptual Wetland Mitigation Plan (Ogden 2000). The success standards are specific percentages of native plant cover, container plant and cutting survival, and tree heights to be achieved through the mitigation. The City will have achieved the goals outlined in the mitigation plan when these success standards have been met for the wetland mitigation site. If the wetland mitigation site meets success standards before year five and all parties agree, early acceptance of the project may be granted. 2.0 SUCCESS STANDARDS Success standards are a set of yearly performance standards for evaluating the wetland mitigation site's progress. These success standards will be evaluated to determine when to implement remedial measures to correct deficiencies in project progress. The qualitative horticultural monitoring data and quantitative botanical monitoring data collected will be analyzed against these success standards, which are outlined in Table 1. 319721000-1007/R0205-008 Page 4 City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 Table 1 Success Standards for the Cannon Road Wetland Mitigation Site Standard I Remedial Measure if Standard Not Met Year One 50% visual ground cover Reseed/replant, substitutions possible Establishment of all species planted or seeded Reseed/replant, substitutions possible 90% healthy container plants Replace with same species/size 80% healthy cuttings Year Two All trees of acceptable growth rate in height Mulch and/or fertilizer may be recommended by the restoration biologist 90% survival of tree container plants' 80% survival of shrub container plants1 Replant with same species/size 80% survival of cuttings 70% total visual ground cover for all species Additional seed or container plants as recommended combined by restoration biologist Years Three through Five Height standards met for all trees Replant or receive remedial measures Tree Height Standards2 Year Three Year Four Year Five Black willow (1 gallon) 8 10 12 Arroyo willow (1 gallon) 8 10 12 Narrow-leaved willow (1 gallon) 4 6 8 Blue elderberry (1 gallon) 4 5 6 90% survival of tree container plants' 80% survival of shrub container plants' Replant with same species/size 80% survival of cuttings 75% cover by all species in year three 3 80% cover by all species in year four Additional seed or container plants as recommended by restoration biologist 90% cover by all species in year five Irrigation will gradually be withdrawn from the mitigation area during years three and four. No further irrigation will be applied after year four. For the project to be considered successful, plants must survive one full dry season without supplemental irrigation. 1 At the discretion of the restoration biologist, dead container plants can be mitigated for by naturally invading seedlings, if such seedlings are within 5 feet of the original plants and of similar species or habitat value. 2 All heights given in feet. Cover of freshwater marsh species is acceptable in place of southern willow scrub species. 31972 1000-1007/R0205-008 Page 5 City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 3.0 HORTICULTURAL MONITORING I AMEC continued horticultural monitoring of the wetland mitigation site during year three as outlined in the mitigation plan (Ogden 2000). Horticultural monitoring at the site included a qualitative assessment of the following parameters: seedling establishment, container plant and cutting health, natural recruitment, irrigation, nonnative plant populations, destructive human uses, pests and diseases, and wildlife habitat value. Monitoring also included photo documentation of the wetland mitigation site. Representative locations, identified in Figure 3, were chosen to provide photographic overview of the wetland mitigation site's progress over the 5-year maintenance and monitoring program. These photographs were taken during botanical monitoring visits in 2002, 2003, and 2004 (Appendix B). ' The following section includes a discussion of each horticultural parameter followed by an overall assessment of the wetland mitigation site in relation to the parameter. 3.1 Seedling Establishment Seedling germination and establishment are based on a variety of factors, including seasonal I rainfall, aspect, soil disturbance, proximity to nonnative invasive plant species, seed viability, and timing of seeding. Evaluation of this parameter includes identifying seedlings of the species included in the native seed mix and following their growth and establishment. Establishment of I seeded species, both with respect to diversity and density of individual species, continues to be very good this year, with many seedlings developing into mature shrubs. The wetland mitigation site has progressed favorably in year three with excellent native seedling establishment and recruitment (Appendix B, Figures B-i through B-8). The density of seedlings observed during horticultural monitoring surveys has decreased slightly compared to years one and two. This is anticipated, however, as seedlings that established during the first 2 years begin to compete more effectively for limited resources. Nonnative and invasive species did not affect seedling establishment in year three. The original seed mix used at the mitigation site included western ragweed, yerba mansa, Douglas mugwort, San Diego sagewort, mulefat, and great marsh evening-primrose. All of the species from the original seeding efforts have established and were detected with the wetland mitigation site in year three (Table 2). Many of the established plants from the seed mix were observed flowering and setting seed during year three, including Douglas mugwort, mulefat, and western ragweed. All species in the seed mix established in the wetland mitigation site in year one, thus satisfying the seedling establishment success criterion. There are no specific success standards established for seedling establishment in year three. I 319721000- 1007/R0205-008 I Page 6 -. -- I 1•• '- fit fIP I A h t ; Y t&f fl . -h. 3 \r- r. / • 1 -. %i6b ;Sj • t4 Ir vo IP ,.;'• • N 1 - - > \ '• W"4P -41 i' 41 / H _____ • -. • v i • : 4 0 Feet 100 50 0 100 200 Yap Notes 1 • SANDAG- 2000 2-foot Resolution, 3-band, - - • False Color Infra-red Imagery 03/21/05 FIGURE Cannon Road Wetland Mitigation Site Photo Viewpoint Locations 3 City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 I 23 March 2005 Table 2 I Species Detected from the Seed Mix on the Cannon Road Wetland Mitigation Site 2004 Scientific Name Common Name Detected within the Site Ambrosia psilostachya western ragweed X Anemopsis californica yerba mansa S X Artemisia douglasiana Douglas mugwort X Artemisia palmed San Diego sagewort X Baccharis salicifolia mulefat X Juncus mexicanus Mexican rush Not planted Qenothera elata ssp. hirsutissima evening primrose X Nomenclature follows Simpson and Rebman 2001. A few, sparsely vegetated areas were observed along the revegetated access road and underneath the Macario Canyon Bridge in the eastern portion of the mitigation site in October 2003. On 7 November 2003, Native Landscape reseeded these areas, at the request of AMEC biologists, with 1 pound of each of the following native species: Douglas mugwort, yerba mansa, and western ragweed. One pound of mulefat was seeded in these areas during a separate visit later during that week. The seed was planted as a remedial measure to encourage seedling establishment and recruitment in these areas. Seedlings of all of these species were detected within the reseeded areas during surveys performed later in year three. 3.2 Container Plant and Cutting Health The health of container plants and cuttings is visually assessed for container plants and cuttings installed within the wetland mitigation site. If plants appear to be in poor health, remedial measures can be recommended. Dudek conducted a 120-day dead plant count in June 2001 and some dead container plants were replaced after this period. Approximately 1,074 one-gallon container plants and 513 cuttings were originally planted in the wetland mitigation site in January 2001. These included 45 Fremont cottonwood (Populus fremonti,), 100 narrow-leaved willow (Salix exigua), 158 black willow (Salix gooddingii), 175 arroyo willow (Salix lasiolepis), 62 blue elderberry, 184 mulefat, 42 arrow weed, 140 California wild rose, and 168 California blackberry container plants as well as 258 mulefat and 255 arroyo willow cuttings. I Success standards for years three through five required that 90 percent of tree container plants and 80 percent of shrub container plants and cuttings survive (Table 1); or no more than 10 percent mortality and 20 percent mortality, respectively, may occur. Container plants (of both I trees and shrubs) and cuttings met and surpassed these criteria in years one and two (Table 3). Therefore, the mitigation site achieved and surpassed all success standards for container plant and cutting survival associated with year five and were not assessed again in year three (AMEC 1 2003, 2004). I 319721000-1007/R0205-008 Page 8 i City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 I 23 March 2005 Table 3 Container Plant and Cutting Mortality for Cannon Road I Wetland Mitigation Site - 2002 and 2003 Mortality 2002 Mortality 2003 Cumulative Species Common Name Type Number Mortality Number Number Number Planted Dead Percent Dead Percent Dead Percent Baccharissalicifolia mulefat cuttings 258 13 5.0% 8 3.1% 21 8.1% Baccharis salicifolia mulefat 1-gallon 184 1 0.5% 0 0.0% 1 0.5% Pluchea sericea Arrow weed Liners 42 0 0.0% 0 0.0% 0 0.0% Populus fremontii Fremont cottonwood 1-gallon 45 2 4.4% 4 8.9% 6 13.3% Rosa californica California wild 1-gallon 140 21 15.0% 3 2.1% 24 17.1% rose Rubusursinus California blackberry 1-gallon 168 30 17.9% 3 1.8% 33 19.6% Salix exigua narrow-leaved 1-gallon 100 2 2.0% 1 1.0% 3 3.0% willow Salixgooddingii black willow 1-gallon 158 5 3.2% 1 0.6% 6 3.8% Salix lasiolepis arroyo willow cuttings 255 15 5.9% 20 7.8% 35 13.7% Salixiasiolepis arroyo willow 1-gallon 175 4 2.3% 6 3.4% 10 5.7% Sambucus blue elderberry 1-gallon 62 2 3.2% 0 0.0% 2 3.2% mexicana Unknown 1-gallon 6 0 6 Total 1,587 101 6.4% 46 2.9% 147 9.3% Total Tree Container Plants 540 15 2.8% 12 2.2% 27 5.0% Total Shrub Container Plants 534 52 9.7% 6 1.1% 58 10.9% Total Cuttings 513 28 5.5% 28 5.5% 56 10.9% I During October 2002 and 2003, all Container plants and cuttings were counted to determine their survival at the end of years one and two. Container plants and cuttings were not counted or I analyzed at the end of year three (2004). The reason is that the native, noncontainer and noncutting plants onsite (e.g., native species that have come from past seeding efforts or natural recruitment) have been so successful that it has become impossible to accurately distinguish them from the container plants and cuttings onsite. In addition, the mitigation site success standards (Table 2) state the following: "At the discretion of the restoration biologist, dead container plants can be mitigated for by naturally invading seedlings, if such seedlings are I within 5 feet of the original plants and of similar species or habitat value." Given that there are so many established, naturally recruited, native plants in the areas where the container plants and cuttings were installed, it is the judgment of AMEC biologists that if any container plants I 319721000-1007/R0205-008 I Page 9 I I I I I I I City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 I 23 March 2005 and/or cuttings sporadically died during year three, their value to the site has been fully mitigated by the naturally recruited plants onsite. 1 3.3 Natural Recruitment I In addition to planting and seeding activities, plants establishing onsite can originate from several sources, including propagules that are transported to the site by wind, water, or animal vectors. Similarly, seeds may already occur in the soil prior to restoration activities. This natural I recruitment plays an important role in increasing the diversity and density of native plant species within the restoration area. This is particularly true for this wetland mitigation site since it is surrounded by healthy, well-established upland and riparian native habitats that serve as ' potential source populations for incoming seed. Evaluation of this parameter involves identifying germinating seedlings or volunteers that were not included in the seed mix. I Natural recruitment can also occur when native species that are seeded or planted within an area produce seed on their own, thereby increasing the density of that particular species within the restoration area. A number of native annual and perennial species produced seed this year I within the wetland mitigation site. This continuing input of native seed contributes to the recruitment of native plant species across the wetland mitigation site. IA total of 68 plant species have been observed at the wetland mitigation site through year three (Table 4). This includes 45 native species of which about half have colonized the site through natural recruitment. Species diversity is high for year three at the wetland mitigation site and I indicates the wetland mitigation site, as a whole, is performing well. The high diversity can be attributed to several factors: the presence of three vegetation associations (freshwater marsh, southern willow scrub, and coastal sage scrub) on and surrounding the wetland mitigation site, I .seeds from container plants and cuttings, seeds present in the soil, and seeds carried in from adjacent native habitats. Many obligate and facultative indicator wetland species not included in the seed mix were noted as occurring within the wetland mitigation site in the first annual report. I These species, including alkali bulrush (Scirpus maritimus), small-fruited bulrush (Scirpus microcarpus), California bulrush (Scirpus californicus), spike rush (Eleocharis sp.), tall cattail (Typha latifolia), salt marsh fleabane (Pluchea odorata), pickleweed (Salicornia virginica), I southwestern spiny rush (Juncus acutus ssp. leopoldi,), and fireweed (Epilobium ciliatum spp. ciliatum), are naturally establishing, providing seed, and contributing to native cover in the wetland mitigation site. 1 3.4 Irrigation I Irrigation is often supplied to restoration sites to encourage establishment and growth of vegetation and to ensure survival of established seedlings and cuttings. Irrigation is usually supplied to a site during the first to third years and sometimes continues into the fourth or fifth I year depending on the vegetative establishment and success at the site. Supplemental irrigation was used throughout the mitigation site to encourage plant growth and survival. Irrigation was turned off throughout a majority of the site on 1 June 2003 when it was deemed unnecessary for I continued site success. Supplemental irrigation continued along the revegetated access road during most of year two to discourage foot traffic and vagrancy. Supplemental irrigation was turned off in this area on 6 October 2003, as the dense vegetation occurring along the I 319721000- 1007/R0205-008 I Page 10 City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 I23 March 2005 Table 4 I Species Detected at the Cannon Road Wetland Mitigation Site 2001 through 2004 Scientific Name Common Name Ambrosia psiostachya * western ragweed Anagallis arvensis scarlet pimpernel Anemopsis californica* yerba mansa Apium graveolens wild celery Artemisia califomica* California sagebrush Artemisia dougfasiana* mugwort Artemisia palmen* San Diego sagewort Atriplex semibaccata Australian saltbush Baccharis pilularis* S coyote bush Baccharis salicifolia* mulefat Baccharis sarothroides * broom baccharis Brassica nigra black mustard Centaurea melitensis tocalote Chenopodium sp. pigweed Conium maculatum common poison hemlock Cortaderia selloana pampas grass Cotula coronopifolia African brass buttons Cyperussp.* sedge Deinandra fasciculata* tarplant Deinandra paniculata tarplant Digitaria sanguinalls crab grass Eleocharis sp.* spike rush Encelia californica* California encelia Epilobium ciliatum ssp. ciliatum* willow herb Eriophyllum confertiflorum' golden yarrow Foeniculum vulgare wild fennel Gnaphalium sp. everlasting Gnaphalium bicolor* cudweed Gnaphalium cafifornicum* California everlasting Heliotropium curassivicum * salt heliotrope Isocoma menziesir coastal goldenbush Juncus acutus ssp. IeopoIdii' southwestern spiny rush Lepidium latifolium perennial pepperweed Lotus scoparius' deerweed 31972 1000-1007/R0205-008 Page 11 I :1 I I I City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 Table 4 (Continued) Species Detected at the Cannon Road Wetland Mitigation Site 2001 through 2004 Scientific Name Common Name Lythrum hyssopifolium grass poly Marrubium vulgare horehound Melilotus indica yellow sweet clover Nassella pulchra* purple needle grass Qenothera elata ssp. hirsutissima* great marsh evening-primrose Picris echioides bristly ox-tongue Plantago sp. plantain Pluchea odorata saltmarsh fleabane Pluchea sericea* arrow weed Polypogon monspeliensis rabbitfoot grass Populus fremontii Fremont cottonwood Ricinus communis castor bean Rorippa nasturtium-a quaticum water cress Rosa californica* California wild rose Rubus ursinus * California blackberry Rumex crispus curly dock Salicornia virginica* pickleweed Salix exigua narrow-leaved willow Salix gooddingii black willow Salix Iasiolepis* arroyo willow Salsola tragus Russian thistle Salvia mellifera • black sage Sambucus mexicana Mexican elderberry Scirpus californicus* California bulrush Scirpus cernuus* California club-rush Scirpus maritimus* alkali bulrush Scirpus microcarpus* small-fruited bulrush Solanum xantr purple nightshade Sonchus asper prickly sow thistle Sonchus oleraceus common sow thistle Spergularia marina* salt marsh sand-spurry Tamarix sp. saltcedar Typha IatifoIia* tall cattail Xanthium strumarium* cocklebur Nomenclature follows Simpson and Rebman 2001. *Denotes plant species native to southern California. 319721000-1007/R0205-008 Page 12 I I I I I I I I City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 I 23 March 2005 revegetated access road was sufficient to discourage illegal usage of the mitigation site. In I summary, a majority of the mitigation site has been off supplemental irrigation since 1 June 2003, and the entire mitigation site has been off irrigation since 6 October 2003. Given the overall success of the native, wetland vegetation onsite since the irrigation was turned off, it is I unlikely that supplemental irrigation will be needed again at the site. 3.5 Nonnative Plant Populations I Control of nonnative plant populations is one of the most important factors in the success of any restoration project because invasive and nonnative plants prevent the establishment of native species by competing with them for important resources (Bossard et al. 2000). Maintenance I weeding concentrated on invasive weed species, such as bristly ox-tongue (Picris echioides), wild fennel (Foeniculum vulgare), pampas grass (Cortaderia selloana), saltcedar ( Tamarix sp.), and perennial pepperweed (Lepidium latifolium), which pose a threat to native plant I establishment. Several nonnative plant species, such as rabbitfoot grass (Polypogon monspeliensis) and African brass buttons (Cotula coronopifolia), which are not considered I invasive, were left in the wetland mitigation site. It was assumed, based on past experience, that these two species would not compete with the native riparian species in the wetland mitigation site and that, over time, they would not be a major component in the wetland mitigation site. Maintenance weeding was completed with manual and mechanical techniques, and herbicides I were applied where deemed effective in the wetland mitigation site. Nonnative weed species were not a problem during year three, as they never composed a I significant percentage of the mitigation site. Scattered perennial pepperweed plants resprouted in the wetland mitigation site in the beginning of year three after some localized populations of these plants were hand-weeded and sprayed with herbicide toward the end of year two. IHowever, Native Landscape continued to treat them and they were not detected again during year three. In addition, localized populations of bristly ox-tongue, prickly sow thistle (Sonchus I asper), common poison hemlock (Conium maculatum), tamarisk, and pampas grass were detected onsite or immediately adjacent to the site during year three. These species were also controlled by Native Landscape periodically throughout year three by a combination of I mechanical weeding and spot spraying of herbicide. No nonnative weed species were detected during the last site visit of year three. These species are not anticipated to become a problem within the mitigation site in the future because the native cover is now very well established and I should be able to out-compete nonnative seedlings that could sprout onsite. 3.6 Destructive Human Uses During year one monitoring, bicycle and motorcycle tracks were observed in the wetland mitigation site, creating trails and thereby injuring or killing vegetation. In addition, a homeless encampment had been established in the southern portion of the wetland mitigation site. The City sent a representative to the homeless encampment several times to inform the inhabitant(s) to vacate the wetland mitigation site, and the encampment was eventually abandoned. I Destructive human use of the wetland mitigation site was a major focus of City resources and attention during the second year of monitoring. Motorized and nonmotorized vehicle use has been eliminated due to the maturation of the vegetation within and adjacent to previously used 319721000-1007/R0205-008 I Page 13 City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 trails. Although the homeless encampment was vacated in October 2002, usage of the southern terminus of the revegetated access road continued into early 2003. Migrant workers were using this portion of the wetland mitigation site to bathe and wash clothing. To discourage usage, the City extended existing fencing in this area and installed new fencing at the northern terminus of the access road where it merges with the remainder of the project area. Twenty 1-gallon southwestern spiny rush container plants were installed on 7 November 2003 along the extended fenceline in the southeastern corner of the project area. Although these container plants are still sub-adult sized (approximately 18 to 24 inches tall), these plants are established and healthy and would be painful to walk through, which discourages trespassers from bypassing the fence where it meets with vegetation. A small portion of the access road used for bathing and washing clothes was lowered in elevational grade to permit the pooling of water along currently utilized trails. In addition, the City posted signs in English and Spanish informing readers of the project area access restriction. The cumulative effect of these actions has led to the gradual abandonment of the mitigation site by former trespassers. No destructive human uses, including migrant worker activity, were observed within the mitigation area in year three, presumably due to the remedial measures implemented during year two and the beginning of year three. Due to these measures, as well as the high cover of mature vegetation present onsite, it is not expected that destructive human uses will resume in the future. 3.7 Pests and Diseases A number of animal or insect species can become pests within restoration sites if their populations are not controlled or measures are not initiated to reduce their effect. Similarly, some plant diseases can have a devastating effect if the symptoms are not identified early and remedial actions are not employed. Many of the pests and diseases observed in restoration sites are naturally occurring and are often seasonally fluctuating events. A proactive management program identifies and evaluates these issues, providing remedial measures when site success is jeopardized. Pests have become much less of a problem in year three. Herbivory by rabbits and gophers utilizing the wetland mitigation site has occurred throughout year three. These mammals tended to favor narrow-leaved willow seedlings, saplings, and cuttings. However, no plant deaths were directly attributable to browsing by herbivores. Moreover, most of the vegetation in the mitigation site has matured to the point where the herbivory is negligible to the overall health of the site. Of greater concern is a persistent infestation of oyster-shell scale (Lepidosaphes u/mi) that broke out in year two among willows and cottonwoods within the access road portion of the wetland mitigation site. Although scale species occur naturally throughout most riparian systems, heavy scale infestations have substantially reduced the health of many otherwise healthy willows along the revegetated access road, in some instances causing death. Plant-tek, a landscape pest management company, contained one outbreak of scale with the application of horticultural oil during spring 2003. Horticultural oil was used over chemical control methods as the required treatment coincided with the bird-breeding season. In fall 2003, scale were once again noticed on new growth of willows in the revegetated access road. The City contracted Plant-tek to spray the oyster-shell scale with Malathion, an 31972 1000-1007/R0205-008 Page 14 City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 organophosphate insecticide. This chemical was sprayed for mosquito abatement in lagoons in San Diego County and has been shown to have a short half-life and relatively safe for application near nontarget organisms (e.g., birds, mammals). On 9 December 2003, Plant-tek applied Malathion directly to the infested trees, thereby minimizing the quantity of chemical released into the project area. The mitigation area was monitored for the success of the scale treatment over the remaining horticultural monitoring visits (January, February, April, May, and June 2004). The pesticide application is considered successful if the scale do not disperse from the locations where they were sprayed. The scale treatment appears to have been successful. During the horticultural monitoring visits in 2004, only two visits revealed some potential scale dispersal. Some extremely small and localized scale dispersal occurred on several willows along the revegetated access road. No additional evidence of scale dispersals were found during the following June 2004 monitoring visit. Only minor occurrences of pests and diseases have been identified in the wetland mitigation site in 2004 and no additional corrective actions are recommended, as the City and AMEC applied pesticide several times to control/eliminate pests in the wetland mitigation site and the applications appear successful. 3.8 Wildlife Habitat Value The quality of habitat within the wetland mitigation site has continued to improve during year I three monitoring. The freshwater marsh component of the project area is at late-seral stage species composition and overall vegetative density. Through the growth of maturing container plants and high levels of natural recruitment, southern willow scrub habitat has become dense in I many areas of the wetland mitigation site. Although slower to develop, the revegetated coastal sage scrub area in the northeastern region of the project area has matured as expected considering it has been planted for only three years. The overall wildlife habitat quality of the I wetland mitigation site is moderate for open-habitat specialists and good to high for more closed-habitat specialists. The wetland mitigation site cover ranges from moderately dense with occasional openings in the revegetated access road to closed in the middle portion under the Macario Canyon Bridge. Common wildlife species using the wetland mitigation site include pacific treefrog (Hyla regilla), lesser goldfinch (Carduells psaltria), mourning dove (Zenaida macroura), black phoebe (Sayornis nigricans), mice (Chaetodipus sp.), coyote (Canis latrans), and bobcat (Fe/is rufus). Several sensitive wildlife species have also been using the wetland mitigation site including coastal California gnatcatcher (Polloptila californica californica), yellow-breasted chat (Icteria virens), least Bell's vireo ( Vireo be/Ill pusillus), white tailed kite (Elanus leucurus majusculus), red-tailed hawk (Buteo jamaicensis), and northern harrier (Circus cyaneus). Potentially suitable habitat exists for southwestern willow flycatcher (Empidonax trailill extimus) and light-footed clapper rail (Rallus longirostris levipes). Least Bell's vireo has been documented as nesting in Macario Canyon for the past several years (Ogden 2000). On 20 March 2003, AMEC detected one least Bell's vireo in the mature southern willow scrub adjacent to the wetland mitigation site (AMEC 2004). During the 28 May 2004 horticultural monitoring survey, one least Bell's vireo was also observed foraging and calling from the willows in the revegetated access road. 31972 1000-1007/R0205-008 Page 15 I City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 4.0 BOTANICAL MONITORING AMEC biologists modified the botanical monitoring survey methodology in 2004 (compared to the previous 2 years of botanical monitoring) since all year five success criteria had been met in previous years except tree heights. Only tree heights were measured since this was the only attribute that had not reached year five success criteria. Most of the container trees within the mitigation site exceeded their year five success standards for tree heights at the end of year two (2003), with the exception of the arroyo willows, which fell short of the average tree height criterion by 7 inches (AMEC 2004). Because not all of the trees met the year five success standards in year two, AMEC biologists measured and analyzed year three tree heights in December 2004. Section 4.1 below describes the monitoring methodology for the first 2 years (2002 and 2003) and the tree height monitoring transects for years one through three (2002-2004). 4.1 Monitoring Methods Absolute percent cover data were not collected or analyzed for year three for the reasons discussed in Section 4.0. Absolute percent cover data were collected for years one and two. Six 30-meter by 3-meter belt transects were established in the same transect locations used in botanical monitoring for year one (Figure 4). The transect locations were initially determined after the mitigation site was established in 2001 by randomly choosing a number on the x- and y-axes for the beginning of each transect. Transects one and two are located on the revegetated access road. Transects three through six are located in the wetland mitigation site underneath and adjacent to Macario Canyon Bridge. Transects three and four are on the east side of the wetland mitigation site. Transects five and six are on the west side of the wetland mitigation site. To ensure transects can be located in future years, the origin and terminus of each transect were marked with 5-foot PVC pipe and labeled with pink flagging. Documentary photographs were taken from the beginning of each transect facing in the direction in which the data were collected in October 2002, October 2003, and December 2004 (Appendix C).. AMEC used the line intercept method to measure absolute percent cover of all plant species encountered. The linear extent to which each species intersected the transect was recorded directly into a handheld computer. All plant species were identified to genus and species when possible. Absolute percent cover was calculated for the transects. Absolute cover measures the canopy cover of all layers of vegetation, taking into account the overlapping characteristics of many herbs, shrubs, and trees. Bare ground and litter were also recorded. Absolute percent cover will be referred to as percent cover for the remainder of this report. The data were analyzed to provide total cover of native and nonnative species, including a breakdown by each species. Raw botanical data for year two are included in Appendix D of the Second Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1. Ll I I I I I I I I I 1 I [1 I U 319721000-1007/R0205-008 Page 16 7;..' i A ( 1" '4 ' Transect-4 _Photograph- At Transect-i hotoaraoh- 1 Transect-3 Transect-6 / Photograph-5 Transect-2 0 P___ l Feet Legend 100 50 0 100 200 C Photo Locations Map Notes - 30-Meter Transects m SANDAG- 2000 2-toot Resolution, 3-band False Color Infra-red Iagery , Mitigation Site IS 14/cannonfarcmap/Transect_Iocation.mxd FIGURE Cannon Road Wetland Mitigation Site Transect and Photograph Locations 4 City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 I 23 March 2005 To collect tree height data, belt transects were established alongside the same transects used I to collect percent cover. Three meters were measured on the east side of the tape to create the belt transects on transects one and two and on the north side for transects three through six. All belt transects were 30 meters in length. All container trees within the belt transect were I measured in meters using a tree height measurement device. Pink flagging was tied onto each tree that was measured so that the same trees can be measured in the future, although it is understood that sample size may vary from year to year. The tree height data were analyzed to I calculate average height. - 4.2 Analysis of Botanical Monitoring 1 4.2.1 Percent Cover Total percent cover in the wetland mitigation site increased from 100.9 percent at the end of I year one to 115.4 percent at the end of year two (Table 5). From year one to year two, total native cover increased from 92.0 percent to 109.7 percent while total nonnative cover decreased from 8.8 percent to 5.8 percent (Table 5). Total percent cover for the wetland I mitigation site performed above the year five success standard of 90 percent cover for years one and two (Table 1). Year five success standards for absolute percent cover were met and surpassed in years one and two and therefore was not remeasured in year three. I Native vegetative cover is largely attributed to arroyo willow, tall cattail, California bulrush, and black willow. These species have readily colonized the wetland mitigation site. The majority of I the nonnative cover (6.5 and 4.8 percent for years one and two, respectively) is attributable to rabbitfoot grass, a noninvasive, nonnative species I 4.2.2 Tree Heights Tree height data for year three were collected in December 2004. Average heights for container I plants after year three are presented in Table 6. Average height for planted mulefat container plants is 9.0 feet. Average height of narrow-leaved willow container plants is 11.6 feet. Average height of black willow container plants is 13.9 feet. Average height of arroyo willow container ' plants is 11.6 feet. Average height for Fremont cottonwood container plants is 9.1 feet and the average height of blue elderberry is 7.4 feet. For year three, all container plants outlined as having success standards (narrow-leaved willow, black willow, and blue elderberry) have I achieved the height success standard for year five except for arroyo willow (Table 1). Arroyo willow has not met year five success standards, although this species is within 4 inches of this goal. Fremont cottonwood and mulefat container plants do not have tree height success standards associated with them. Li I 319721000- 1007/R0205-008 Page 18 City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 I 23 March 2005 Table 5 I Plant Species Cover of the Cannon Road Wetland Mitigation Site 2002 and 2003 Scientific Name Common Name Absolute Cover (%) Year 1 (2002) Absolute Cover (%) Year 2 (2003) Salix lasiolepis arroyo willow 20.1% 28.3% Salix gooddingii black willow 8.3% 14.5% Typha latifolia tall cattail 12.1% 12.5% Scirpus californicus California bulrush 10.3% 9.8% Baccharis salicifolia mulefat 6.7% 9.1% Artemisia douglasiana Douglas mugwort 6.3% 8.0% Scirpus maritimus prairie bulrush 7.4% 6.3% Anemopsis califomica yerba mansa 1.8% 5.5% Polypogon monspeliensis rabbitfoot grass 6.5% 4.8% Rubus ursinus California blackberry 1.6% 3.5% Salix exigua narrow-leaved willow 1.6% 2.9% Pluchea odorata saltmarsh fleabane 7.6% 2.7% Artemisia pa/men San Diego sagewort 0.4% 2.3% Ambrosia psi/ostachya western ragweed 2.5% 1.8% Qenothera data ssp. hirsutissima great marsh evening- primrose 2.7% 0.6% Picris echioides bristly ox-tongue 2.3% 0.6% Juncus acutus ssp. /eopoldii southwestern spiny rush 0.1% 0.6% Rosa californica California rose not detected* 0.4% Cotula coronopifolia brass buttons not detected* 0.3% Baccharispilu/anis coyote bush 0.01% 0.3% Pluchea sericea arrow weed not detected* 0.3% Scirpussp. bulrush 0.7% 0.3% Eleocharis sp. spikerush 1.3% 0.1% Apium graveolens celery not detected* 0.03% Heliotropium curassavicum salt heliotrope 0.5% 0.01% Sonchus oleraceus common sow thistle not detected* 0.01% Epiobium ciliatum willow herb 0.03% not detected* Salicornia virginica pickleweed 0.01% not detected* Bare ground Bare ground not calculated 23.1% Litter Litter not calculated 3.5% Percent Total Cover 100.9% 115.4% Percent Native Cover 92.0% 109.7% Percent Nonnative Cover 8.8% 5.8% Indicates mat the species was not detected on the botanical monitoring transects for both year one and year two. 31972 1000-1007/R0205-008 Page 19 City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 Table 6 Average Heights of Container Plants for the Cannon Road Wetland Mitigation Site 2002 through 2004 Average Tree Average Tree Average Tree Scientific Name Common Name Height in Feet Height in Feet Height in Feet (Sample Size) (Sample Size) (Sample Size) Year 1 Year 2 Year 3 Baccharis salicifolia mulefat 6.0(25) 7.8(25) 9.0(21) Salixexigua narrow-leaved willow 7.5(12) 12.2 (12) 11.6(6) Safix gooddingii Goodding's black 9.0(18) 12.5 (21) 13.9 (15) willow Salix lasiolepis arroyo willow 9.0(25) 11.4 (29) 11.6 (34) Populus fremontii Fremont's 6.3 (8) 9.6 (8) 9.1 (4) cottonwood Sambucus mexicana blue elderberry 4.0(5) 7.3(7) 7.0(6) 5.0 RECOMMENDATIONS 5.1 Evaluation of Restoration Success Vegetation has established well throughout the wetland mitigation site, meeting and exceeding year five success standards for absolute percent cover. Adequate seed establishment, greater than expected natural recruitment, and perennial water flow through the project area have all contributed to this site's continued success. In addition, the wetland mitigation site has satisfied year five success standards for container plant and cutting survival as well as tree heights (excepting arroyo willow). The wetland mitigation site is expected to continue to meet year five success standards provided that the remedial measures outlined below are followed. 5.2 Recommendations for Year Three The following remedial measures are recommended for the site for year four of the Cannon Road Extension Project wetland mitigation monitoring program: Continue to monitor all areas infested with oyster-shell scale. Respray with Malathion if new infestations are located and/or old infestations remain problematic. Continue to monitor the wetland mitigation site for nonnative, invasive plants and control/eliminate them as appropriate. Treatment of nonnative, invasive plants is recommended to occur quarterly for year four. Continue to monitor illegal usage of the wetland mitigation site by migrant workers. 319721000-1007/R0205-008 Page 20 City of Carlsbad Third Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1 23 March 2005 6.0 REFERENCES I AMEC Earth & Environmental, Inc. (AMEC). 2003. First Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1. January. I AMEC Earth & Environmental, Inc. (AMEC). 2004. Second Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach 1. January. Bossard, C.C., J.M. Randall, and M.C. Hoshovsky, editors. 2000. Invasive Plants of California's I Wildiands. University of California Press, Berkeley, California. Ogden Environmental and Energy Services Co., Inc. 2000. Conceptual Wetland Mitigation Plan I for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California. July. I .Simpson, Michael G. and Jon P. Rebman. 2001. Checklist of the Vascular Plants of San Diego County. 3rd edition. SDSU Herbarium Press, San Diego, California. j I I LF-1 I 319721000-1007/R0205-008 Page 21 I I I I I I 10 September 2003 Project No. 319721000-1007 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project I (Macario Bridge): First -Horticultural Monitoring Report for Year Three I Dear Ms. Howard: AMEC Earth & Environmental, Inc. (AMEC), submits the first horticultural monitoring letter report for year three in accordance with the Conceptual Wetland Mitigation Plan for Temporary I Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000. The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application I No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California '(1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 & 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and. California Coastal Commission Coastal Development Permit No. 6-97-11. According to the I! Wetland Mitigation Plan, monthly horticultural monitoring reports must be completed for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three I though five, horticultural monitoring visits will occur at a minimum of 8-times a year, and horticultural letter reports will be completed after each visit. I On 3 September 2003, AMEC performed the first horticultural site visit for year three Of the Cannon Road Macario Bridge wetland area biological monitoring program.. During the site visit, AMEC biologists Jessie Walker and Matt Guilliams and City Project Manager Sherri Howard I assessed the condition of the mitigation site. Issues addressed included health of wetland vegetation, weed control, remedial measures, and the homeless use of the mitigation site. During the previous site visit (16 July 2003), many volunteer narrow-leaved willow (Salix exigua) and arroyo willow (Salix lasiolepis) saplings were observed growing in the mitigation site. These natural recruits continue to thrive, greatly increasing the vegetative cover on access trails and between existing plants off-trail. Although most plant species within the restoration area have flowered and set seed, native species such as saltmarsh fleabane (Pluchea odorata), evening primrose (Oenothera elata ssp. hirsutissima), and California mugwort (Artemisia douglasiana) were observed in flower during the survey. Deerweed (Lotus scoparius), arrow AMEC Earth & Environmental, Inc. I 5510 MorehouseDrive San Diego, CA 92121 Tel (858) 458-9044 Fax (858) 458-0943 www.amec.com I 319721000-1007/cannon Road Hort Report 1 Year 3.doc Page 1 Ms. Sherri Howard City of Carlsbad 16 July 2003 weed (Pluchea sericea), goldenbush- (Isocoma menziesi,), California rose (Rosa californica), California blackberry (Rubus ursinus), and cattail (Typha sp.) were observed setting seed. No new nonnative, invasive plants were located during the site visit. Native Landscape has implemented a rigorous control program to eradicate a localized population of the invasive species, perennial pepperweed (Lepidium latifolium). Control efforts 'have been highly successful; only a few (5-10 individuals) isolated plants were observedresprouting during the monitoring visit. AMEC contacted Native Landscape regarding these seedlings, on. 5 September 2003. Native Landscape will remove these individuals during the second week of September. Due to the aggressive nature of this species, AMEC biologists will continue to monitor the mitigation site for new populations and resprouting individuals' in the existing treatment area. Oystershell scale (Lepidosaphes u/mi), a small, inconspicuous insect, has been observed on the newt growth of several willow (Salix spp.) species. A previous outbreak of scale was sprayed with insecticidal oil during the spring of 2003. AMEC will assess the severity of the current scale infestation and provide remedial measures over the coming.months.; The presence of migrant workers throughout the mitigation site had been impacting vegetation and affecting water quality. The City has implemented many strategies to. discOurage trespassing and personal use of the project area, including fencing of certain high use areas, posting of signage in English and Spanish, and development of biotic and abiotic deterrents.. Native Landscape has increased the irrigation, lowered the ground level,, and planted hydrophytic vegetation in the. high-use wetland area in the southern portion of :the mitigation Site. This developing wetland had been used by migrants for bathing and to wash clothing. No evidence, of these activities was observed during the site visit. It is probable that the lack of access and increased wetland characteristics resulting from the recently implemented measures have discouraged migrant usage. AMEC and the City will continue to monitor migrant farm worker activity within the mitigation site. .AMEC will .continue horticultural monitoring visits and submit progress reports for year three in accordance with the project's permits and agreements. In addition, quantitative data will be colleôted during a botanical monitoring site visit scheduled for the beginning of October. If you have any questions, please call me at (858) 458-9044, extension :328, or, email me at matt.guill.iams@amec.com. " Sincerely, AMEC Earth & Environmental, Inc. 4~~- - Matt Guilliams Botanist MG/= cc: Debbie Fromme; Native Landscape, Inc. File Contracts I 319721000-1001/Cannon Road Hort Report 1 Year 3.doc Page 2 I I I 8 December 2003 Project No. 319721 000-1 007 I Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project I (Macario Bridge): Second Horticultural Monitoring Report for Year Three Dear Ms. Howard: - AMEC Earth & Environmental, Inc. (AMEC), submits the second horticultural monitoring letter report for year three in accordance with the Conceptual Wetland Mitigation Plan for Temporary I Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000. The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application I No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 & 5-045-97;.CDFG California Incidental Take Permit (No. 2081-1998-0-5); and I California Coastal Commission Coastal Development Permit No. 6-97-11. 'According to the Wetland Mitigation Plan, monthly horticultural monitoring reports must be completed for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three I though five, horticultural monitoring visits will occur at a minimum of 8 times. a year, and horticultural letter reports will be completed after each visit. I On 30 October 2003, AMEC performed the second horticultural site visit for 'year three of the Cannon Road Macario Bridge wetland area biological monitoring program. During the site visit, AMEC botanist Matt Guilliams assessed the condition of the mitigation site. The willow riparian restoration area directly under the bridge is performing well, with hundreds of naturally recruiting willow (Salix spp.) saplings establishing a dense, low thicket with interspersed shrub and herb species. The freshwater marsh component in this area is also well established, with I dense stands' of cattail (Typha latifolia) and California bulrush (Scirpus californicus) along the banks of the waterways. Perennial water flow and inundation in the extended freshwater marsh in the southwest corner of the project area have created ideal conditions for the growth of I native hydrophytic vegetation. Cattail and yerba mansa (Anemopsis californica) have already begun to establish in this area. The access trail in the eastern portion of the project area has overgrown with dense vegetation, although a few sparsely vegetated areas occur. On 7 I November 2003, Native Landscape seeded these areas as a remedial measure per the request of AMEC with one pound of each of the following native species: Douglas mugwort (Artemisia 319721000-1007/Cannon Road Hort Report 2 Year 3.doc AMEC Earth & Environmental, Inc. Page 1 I 5510 Morehouse Drive San Diego, CA 92121 Tel (858) 458-9044 Fax (858) 458-0943 www.amec.com I Ms. Sherri Howard City of Carlsbad 16 July 2003 douglasiana), yerba mansa, and western ragweed (Ambrosia psilostachya). One pound of mulefat (Baccharis salicifo/ia) was seeded in these areas during a separate visit later in the week. During the survey, many plants were in flower, including coastal goldenbush (Isocoma menziesii), California bulrush, broom baccharis (Baccharis sarothroides), saltmarsh fleabane (Pluchea odorata), Douglas mugwort, cattail, coyotebush (Baccharis pilularis), mulefat, and western ragweed. Cocklebur (Xanthium strumarium), California rose (Rosa californica), and Palmer's sagewort (Artemisia pa/men) were observed setting seed. All supplemental irrigation was discontinued throughout the project area in mid-November 2003. Per regulatory agency permits, the project area must be off water for a period of one year prior to agency sign-off. No new nonnative plants were located during the site visit. Native Landscape has been controlling pepperweed (Lepidium latifolium) and bristly ox-tongue (Picris echioides) where necessary. Control efforts have been highly successful, with only a. few bristly ox-tongue resprouting. Oystershell scale (Lepidosaphes u/mi), a small, inconspicuous insect, has been observed .on the new growth of several willow species. A previous outbreak of scale was sprayed with insecticidal oil during the spring of 2003. Aerosolized oils are effective at smothering certain insects and are safe to use during the majority of the year. Operating outside the bird breeding/nesting season, however, more aggressive pesticides can be safely utilized to eradicate insect pest problems. Given the severity of the scale infestation in the willow and cottonwood population in the eastern project area, Jack Olmstead of Plant-tek Inc. suggested the application of Malathion. This chemical is very effective and is currently being sprayed in lagoons in San Diego County for mosquito control. Per City agreement, Planttek will be direct spot spraying infested willows on 10 December. AMEC biologists will be present to provide access to the project area and guidance, if necessary. The presence of migrant workers throughout the mitigation site had been impacting vegetation and affecting water quality. The City has implemented many strategies. to discourage. trespassing and personal use of the project area, including fencing of certain high use areas, posting of signage in English and Spanish, and development of biotic and abiotic deterrents. Per AMEC guidance, Native Landscape has increased the'irrigation, lowered the ground level,. and planted hydrophytic vegetation in the high-use wetland area in the southern: portion of. the mitigation site as a remedial measure to deter trespass and aid in the success. of the site. This developing wetland had been used by migrants for bathing and to wash clothing, and recent.. activity was noted during the horticultural monitoring visit in October. Additional measures have since been implemented in this area. On 7 November 2003, AMEC botanist Jessie Walker monitored the.hand broadcast of wetland seedmix in the southwest corner of the project area and the installation of 20 one-gallon containers of western spiny rush (Juncus acutus ssp. /eopo/dii) in the same area near the eastern fence boundary. These spine-tipped, perennial shrubs should provide physical deterrent once established. Also on 7 November, the chain link fence in the southwest corner was extended to the east and northwest and a new segment of fence was installed at the eastern project limit near the dirt access road. AMEC and the City will continue to monitor migrant farm worker activity within the mitigation site. Botanical monitoring data were collected on 23 October and 30 October 2003. These data will be incorporated in the Third Annual Report for the purposes of evaluating project development relative to the success standards established in the mitigation plan. This report will be completed in late December for distribution to the City and Agencies in early January. 319721000-1007ICannon Road Hort Report 2 Year 3.doc Page 2 I Ms. Sherri Howard City of Carlsbad 16 July 2003 I. AMEC will continue horticultural monitoring visits and submit progress reports for year three in I accordance with the project's permits and agreements. The next horticultural monitoring visit is tentatively scheduled for mid December. If you have any questions, please call me at (858) 458-9044, extension 328, or email me at matt.guilliams@amec.com. I Sincerely, AMEC Earth & Environmental, Inc. Mall Guilliams Botanist cc: Debbie Fromme; Native Landscape, Inc, • File • • • • 319721000-1007/Cannon Road Hort Report 2 Year 3.doc Page 3 I I 16 January 2004 I Project No. 319721000-1007 I Ms. Sherri Howard Project Manager I City of Carlsbad Engineering Department I 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project I (Macario Bridge): Third Horticultural Monitoring Report for Year Three Dear Ms. Howard: AMEC Earth &Environmental, Inc. (AMEC), submits this third letter report for year three of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of .the Cannon Road Extension Project in Carlsbad, California (July 2000). The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-lCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F- 51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081 1998-075); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, monthly horticultural monitoring reports must be completed for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits will occur at a minimum of 8 times a year, and horticultural letter reports will be completed after each visit. I On 9 December 2003, AMEC performed the third horticultural site visit for year three of the Cannon Road Macario Bridge wetland area biological monitoring program During the site visit, AMEC botanist Matt Guilliams assessed the condition of the mitigation site. Although only in I .year three of monitoring, the mitigation site is performing at greater than anticipated levels. Most restored areas are becoming dense with mid to late seral stage vegetation. The plant community is conspicuously less developed in three small patches due to soil compaction, high salt concentration, and water availability. These areas, one under Maóario Bridge and two along the revegetated access road, are discussed with regard to specific recommendations in the second annual report. Many plants in the restoration site have displayed increased vegetative growth rates due to greater water availability in the project area and species-specific phenological characteristics. In particular, California bulrush (Scirpus californicus), and yerba mansa (Anemopsis californica) have grown significantly throughout the riparian areas of the mitigation site while deerweed AMEC Earth & Environmental, Inc. I 5510 Morehouse Drive San Diego, CA 92121 Tel (858) 458-9044 Fax (858) 458-0943 www.amec.com 1' Page 1 I Ms. Sherri Howard City of Carlsbad Insert Date 1 (Lotus scoparius) and California sagebrush (Artemisia californica) seedlings have grown in upland habitats. A small number of winter or year-round flower producing species were I observed in flower during the third monitoring survey, including coastal goldenbush (Isocoma menziesi,), broom baccharis (Baccharis sarothroides), mulefat (Baccharis sa/icifolia), California sage brush, and western ragweed (Ambrosia psiostachya). Tall cattail (Typha latifolia), I yellowing due to the time of year, was observed setting seed. No new nonnative plant species were located during the site visit. Two pampas, grass (Cortaderia selloana) individuals were observed growing near the revegetated access road. I . Native Landscape was contacted regarding the presence of these plants on 16 December 2003. Native Landscape will remove the pampas grass and control other species such as I pepperweed (Lepidium latifolium) and bristly ox-tongue (Picris echioides)'.where necessary. Oystershell scale (Lepidosaphes u/mi, a small, inconspicuous insect, has been observed on the new growth of several willow (Salix spp.) species. A previous outbreak of scale was sprayed with horticultural oil during spring 2003. Pesticide application outside the bird breeding/nesting season, however, allows for, a wider range of possible treatments given the reduced risk to non-target animal species. On 9 December 2003, Plant-tek Inc., a landscape ,I pest management company, was, contracted by the City to direct spot,spray infested willows and cottonwoods (Populus fremontii) in a .20-foot wide corridor along the revegetated access road. AMEC-botanist Matt Guilliams met with Jack Olmstead of Plant-tek Inc. to identify scale I infested trees and discuss safe application methods. Success of the pesticide application will be evaluated through late winter and early spring. The presence of migrant workers throughout the mitigation site had been impacting vegetation and affecting. water quality. The City has implemented many strategies to discourage trespassing and personal use of the project area, including fencing of certain high use areas, posting of signage in English and Spanish, and development of biotic and abiotic deterrents. Additional measures, described in the second horticultural monitoring report for year three, were implemented in November and seem to be discouraging use of the marsh at the southern terminus of the access road. No new evidence of migrant worker site usage was observed during the survey. AMEC and the City will continue to monitor migrant worker activity.within the mitigation site. I . :The Second Annual Report has been completed and is in the final stages of internal review. This document will be submitted to.the City during the week of 19 January 2004 I . AMEC will continue horticultural monitoring visits and submit progress reports for year three in accordance with the.project's permits and agreements. If you have any questions, please call me at (858) 458-9044, extension 328, or email me at matt.guilliams@amec.com. Sincerely, AMEC Earth & Environmental, Inc. I Matt Guilliams Botanist 319721000-1007/Cannon Road Hort Report 3 Year 3.doc Page 2 I. Ms. Sherri Howard City of Carlsbad Insert Date MG:vm cc: Debbie Fromme; Native Landscape, Inc. File 319721000-1007/Cannon Road Hort Report 3 Year 3.doc Page 3 I I 16 January 2004 Project No. 319721000-1007 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): Fourth Horticultural Monitoring Report for Year Three Dear Ms. Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this fourth letter report for yearthree of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland .Impacts of the Cannon Road Extension Project in Carlsbad,. California (July 2000). The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F- 51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081- 1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, monthly horticultural monitoring reports must be completed for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits will occur at a minimum of 8 times a year, and horticultural letter reports will be completed after each visit. On 6 January 2004, AMEC performed the fourth horticUltural site visit for year three of the Cannon Road Macario Bridge wetland area biological monitoring program. During the site visit, AMEC biologists Matt Guifliams and Jeff Goldberg assessed the condition of the mitigation site. Many plants in the restoration site continue to display increased vegetative growth rates due to greater water availability in the project area and species-specific phenological characteristics. Deerweed (LOtus scoparius), California sagebrush (Artemisia cailfornica), coastal goldenbush (Isocoma menziesii), and California blackberry (Rubus ursinus) have grown noticeably since the third horticultural survey. Arroyo willow (Salix lasiolepis) has begun to develop catkins (spikes of unisexual flowers), attracting swarms of bees and other pollinators. No new nonnative plant species were located during the site visit. The two pampas grass (Cortaderia selloana) individuals observed growing near the revegetated access road during the previous survey have been removed by Native Landscape. Although the restoration area is relatively free of invasive species, Native Landscape will continue to survey for and control AMEC Earth & Environmental, Inc. I 5510 Morehouse Drive San Diego, CA 92121 Tel (858) 458-9044 Fax (858) 458-0943 www.amec.com I Page 1 I I I I I I I Ms. Sherri Howard City of Carlsbad Insert Date nonnative species such as pepperweed (Lepidium latifolium) and bristly ox-tongue (Picris echioides) where necessary. Oystershell scale (Lepidosaphes u/mi), a small, inconspicuous insect, had been observed on the new growth of several willow species during late fall 2003. A previous outbreak of scale was sprayed with horticultural oil during spring 2003. On 9 December 2003, Plant-tek Inc.; a landscape pest management company, applied pesticide (Malathion) to the second outbreak along the revegetated access road. As the shells of dead scale remain on the bark of infested trees, the success of the insecticide treatment is difficult to evaluate. The pesticide application will be considered successful if scale do not disperse from current locations. Infested trees will be monitored through late winter and early spring for evidence of dispersing scale. One additional scale-infested willow was located near the junction of the northern terminus of the access road and the remainder of the project area. All willows in the vicinity of this individual will be monitored for dispersing scale. The presence of migrant workers throughout the mitigation site had been impacting. vegetation and affecting water quality. The City implemented many strategies to discourage trespassing and personal use of the project area, including fencing of certain high us:e areas, posting of signage in English and Spanish, and development of biotic and abiOtic deterrents. Additional measures, including the installation of 20 southwestern spiny rush (Juncus ãcutus spp. /eopoldii) one-gallon container plants near the fence at the southern terminus of the revegetated access road, were implemented in November 2003. All southwestern spiny rush were alive and healthy at the time of the survey, although herbivores have browsed some individuals. As of 6 January 2004, no new evidence of migrant worker site usage was observed. AMEC and the City will continue to monitor migrant worker activity within the mitigation site. - The Second Annual Report has been completed and is in the final stages of internal review. This document will be submitted to the City during the week of 19 January 2004. AMEC will continue horticultural monitoring visits and submit progress reports for year three in I accordance with the project's permits and agreements. If you have any questions, please call meat (858) 458-9044, extension 328, or email me at matt.guilliams@amec.com. I Sincerely, AMEC Earth & Environmental, Inc. I . Matt Guilliams Botanist MG:vm cc: Debbie Fromme; Native Landscape, Inc File 319721000-1007/Cannon Road Hort Report 4 Year 3.doc Page 2. I I I, I I 12 May 2004 Project No. 319721 000-1 007 I Ms. Sherri Howard I Project Manager City of Carlsbad Engineering Department I Carlsbad, 1635 Faraday Avenue California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project I (Macario Bridge): Fifth Horticultural Monitoring Report for Year Three Dear Ms. Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this fifth letter report for year three of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project in Carlsbad, California (July 2000). The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F- 51); California Department Fish and Game (CDFG) Section 1601 Streambe,d Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081- 1.998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, monthly horticultural monitoring reports must be completed for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits will occur at a minimum of '8 times a year, and horticultural letter reports will be completed after each visit. On 4 February 2004, AMEC performed the fifth horticultural site visit for year three of the Cannon Road Macario Bridge wetland area biological monitoring program. During the site visit, AMEC botanist Matt Guilliams assessed the condition of the mitigation site. Hundreds of seedlings of several species of native herbaceous and shrub species have sprouted in response to recent rain events: Within the mitigation site at the bottom of the dirt access road in the northeast, Douglas mugwort (Artemisia douglasiana), black sage (Salvia melilfera), coastal sagebrush (Artemisia californica), cudweed (Gnaphalium sp.), Palmer's sagewort (A. pa/men), and western ragweed (Ambrosia psilostachya) have sprouted, increasing vegetative cover'greatly. Along the revegetated access road, seedlings of Douglas mugwort, Palmer's sagewort, western ragweed, yerba mansa (Anemopsis californica), great marsh evening primrose (Oenothera elata ssp. hirsutissima), and salt marsh sand-spurry (Spergulania marina) have increased the vegetative component in the understory of the developing willow (Salix sp.). canopy. Several' unidentifiable cyperoid plant species have also sprouted, expanding existing stands of freshwater marsh and increasing overall vegetative cover in these areas along the AMEC Earth & Environmental, Inc. 5510 Morehouse Drive I San Diego, CA 92121 Tel (858) 458-9044 Fax (858) 458-0943 www.amec.com I I I I I I I Page 1 I Ms. Sherri Howard City of Carlsbad Insert Date I revegetated access road. In the area underneath Macarlo Bridge, 'cover of willow and herbaceous understory species continues to develop at greater than anticipated 'rates. Specifically, great marsh evening primrose, yerba mansa, and California blackberry (Rubus - ursinus) have sprouted and/or spread in the willow scrub under the bridge spans. I Although no new nonnative plant species were located during the site visit, seedlings from some nonnative species have begun to sprout. Bristly ox-tongue (Picris echioides), common poison hemlock (Conium maculatum), and prickly sow thistle (Sonchus aspe,) constitute a I minor but persistent component of the flora of the restoration site. Native Landscape will continue to survey for and control existing nonnative species and potential invasive species such as pepperweed (Lepidium latifolium) and pampas grass (Cortaderia seioana). Oystershell scale (Lepidosaphes u/mi), a small, inconspicuous insect, was observed on the new growth of several willow species during late fall 2003. No detectable scale dispersal has been observed since the most recent pesticide treatment in early winter. AMEC will continue to monitor previously infested willow species for new evidence of scale. The presence of migrant workers throughout the mitigation site had been. impacting vegetation and affecting water quality in the southern portion of the restoration site. The City has fenced access areas near high use areas and posted of signage in English and Spanish. In November 2003, the City installed 20 southwestern spiny rush (Juncus acutus spp; teopoldi,) one-gallon container plants near the fence' at the southern terminus of the revegetated' access road. All southwestern spiny rush were alive and healthy at the time of the survey, although herbivores have continued to browse new growth on some individuals. Although no site. impacts were detected, coastal sage scrub vegetation bordering the restoration site to the west has been trampled. AMEC and the City will continue to monitor migrant worker activity within the mitigation site. AMEC will continue horticultural monitoring visits and submit progress reports for year three in accordance with the project's permits and agreements. If you have any questions, please call me at (858) 458-9044, extension 328, or email me at matt.guiIliams@amec.com. Sincerely, AMC Earth & Environmental, Inc. Matt Guilliams Botanist MG:vm cc: Debbie Fromme; Native Landscape, Inc. File 319721 OO1007/Cannon Road Hort Report 5 Year 3.doc Page 2 LI I I I I I I I City of Carlsbad Ms Sherri Howard 20 May 2004 dmec I 20 May 2004 Project No. 320741000-1001 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): Sixth Horticultural Monitoring Report for Year Three Dear Ms. Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this sixth letter report-for year three of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project in Carlsbad, California (July 2000). The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental. Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, horticultural mPnitoring visits and reports must be completed monthly for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits must occur at a minimum of 8 times a year, and a horticultural monitoring report must be completed after each visit. On 15 April 2004, AMEC botanist Matt Guilliams performed the sixth horticultural site visit for year three. His assessment of the condition of the restoration site follows. In general, the restoration site has developed to mid-seral stage vegetation. Mid-seral stage. vegetation is composed of a diverse assemblage of well.:established, albeit only semi-mature native plant species. Within the restoration site, native plant diversity is relatively high, with natural recruitment from the surrounding habitat contributing to overall species composition. Nonnative plant species comprise a small percentage of overall vegetative cover within the restoration site. No invasive plant species were observed during the survey. Willow trees (Salix spp.), the dominant tree species within the restoration site, have broken winter dormancy, producing large quantities of catkins and leaves. Other native plant species, including western ragweed (Ambrosia psiostachya), California everlasting (Gnaphalium californicum), salt marsh fleabane (Pluchea odorata), and yerba mansa (Anemopsis californica), have continued to sprout and develop in the willow understory. While many native.plant species 320741 000.1 001/3151-0504L033 Page 1 I El I I LI I I I I I Ms. Sherri Howard City of Carlsbad 20 May 2004 I had just begun to develop at the time of the survey, others had already beguh flowering, I including California blackberry (Rubus ursinus), mulefat (Baccharis salicifolia), Mexican - elderberry (Sambucus mexicana), and California bulrush (Scirpus californicus). Although not a quantifiable success criterion, increased usage of the restoration area by native fauna has been I observed on nearly every survey. Dozens of bird species have been observed foraging and perching within the willows and mulefat. I As mentioned above, nonnative plant species compose very little of the overall plant cover at the restoration site. Bristly ox-tongue (Picris echioides), common poison hemlock (Conium macu/a turn), and prickly sow thistle (Sonchus aspet) have continued to sprout in isolated I patches, especially at the terminus of the revegetated access road. These plant species constitute a larger portion of the habitat adjacent to the restoration site;.therefore eradicating them from the restoration site will be a persistent. maintenance issue. Although not withinthe I restoration site, one tamarisk (Tamarix sp.) was observed along the dirt path bordering the site to the west. Tamarisk is an extremely invasive tree and should be removed before it matures and infests the riparian area in the vicinity of the restoration site. Although no invasive plant species were observed within the mitigation site during the survey,' AMEC and Native I Landscape will continue to survey for invasive species such as pepperweed (Lepidiurn IàtifoIium), tamarisk, and pampas grass (Cortaderia sel/oana). I .Oystershell scale (Lepidosaphes ulmi), a small, inconspicuous insect, was observed on the new growth of several willow species during late fall 2003. No detectable scale dispersal has been observed since the most recent pesticide treatment in early winter 2003. AMEC will continue to I . monitor previously infested willow species for new evidence of scale. Migrant workers had been impacting vegetation and affecting water quality in the southern U portion of the restoration site. The city has implemented various methods of deterring trespassing, including posting signs, fencing primary access points, and installing biological deterrents. No site impacts from trespassing were detected, although a trail through coastal sage Scrub vegetation bordering the restoration site to the west shows signs of recent usage. I AMEC and the City will continue to monitor migrant worker activity within the mitigation site. AMEC will continue horticultural monitoring visits and submit progress reports for year .three in I .. accordance with the project's permits and agreements. If you have any.questions, please call Matt Guilliams at (858) 458-9044, extension 328, or email at 'matt.guilliams@amec.com. Sincerely, Matt Guilliams; Botanist AMEC Earth & Environmental, Inc. - cc: Debbie Fromme; Native Landscape, Inc. - File I 320741000-1001/3151-0504L033 Page 2 I Ms. Sherri Howard City of Carlsbad 30 August 2004 30 August 2004 Project No. 320741000-1001 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): Seventh Horticultural Monitoring Report for Year Three Dear Ms. Howard: I .AMEC Earth & Environmental, Inc. (AMEC), submits this seventh letter report for year three of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project in Carlsbad, California I (July 2000). The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California. (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed I Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, horticultural monitoring visits and reports I must be completed monthly for the City of-Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits must occur at I •a minimum of 8 times a year, and a horticultural monitoring report must lye completed after each visit. I On 28 May 2004, AMEC botanist Mall Guilliams performed the seventh horticultural site visit for. year three. His assessment of the condition of the restoration site follows. Spring and early summer are highly productive periods in the natural systems in southern California. During the I time of the survey, a majority of the plant species within the restoration site had developed new shoots and leaves while some had already begun to produce flowers. The willow trees (Salix spp.) throughout the site have continued to develop, producing new shoots and leaves. The catkins produced on the mature willows earlier 'in the season have gone to seed, producing I large quantities of wind-dispersed seed. Although not as abundant, the western cottonwood (Populus fremontii ssp. fremonti,) saplings scattered throughout the restoration site seemed healthy. as most have developed leaves and new shoots. Natural recruitment has been I relatively high, especially in the less dense areas of the revegetated access road and underneath the southern bridge span. Although not consisting of entirely native species, many natural recruits such as great marsh evening-primrose (Oenothera elata ssp. hirsutissima), salt i marsh fleabane (Pluchea odorata), mulefat (Baccharis salicifolia), coyote bush (B. pilularis), I 320741000-1001/3151-05041033 I Page 1 I Ms. Sherri Howard City of Carlsbad 30 August 2004 annual beard grass (Polypogon monspeliensis), salt marsh heliotrope (Heliotropium I curassavicum), loosestrife (Lythrum sp.), sedge (Cyperus sp.), and brass buttons (Cotula coronopifolia) have been observed within these areas, increasing vegetative cover and thereby I. driving the process of succession. Nonnative plant species compose very little of the overall plant cover at the restoration site and invasive plant species have been almost entirely absent this season. Bristly ox-tongue (Picris I echioides), common poison hemlock (Conium maculatum), and prickly sow thistle (Sonchus aspen have continued to sprout in isolated patches, although Native Landscape has been eradicating these species as they are encountered. AMEC and Native Landscape will continue to survey for invasive species such as pepperweed (Lepidium latifolium), tamarisk (Tamarix sp.), and pampas grass (Cortaderia selloana). Wildlife usage of the restoration area has been 'steadily increasing as the vegetation I communities develop and become more complex. Browsing of herbaceous plant material and wildlife tracks indicate that the site is being, utilized by both small and large mammals. During surveys, I avifaunal species such as lesser goldfinch (Carduelis psaltria), yellow-breasted chat .(Icteria virens), spotted towhee (Pipi/o maculatus), American kestrel (Falco sparverius), northern rough-winged swallow (Stelgidopteryx serripennis), and cliff swallow (Hirundo pyrrhonota) are consistently observed. During this horticultural monitoring visit in May, one least Bell's virèo I (Vireo be//li push/us), a federally endangered species;' was observed foraging and calling from the willows in the revegetated access road. I Oystershell scale (Lepidosaphes u/mi), a small, inconspicuous insect, was observed on the new growth of several willow species during late fall 2003 No detectable scale dispersal has been observed on most previously infested willows and cottonwoods, although some extremely I localized scale dispersal may have occurred on one Willow tree along the revegetated access road. AMEC' will continue to monitor this potential scale dispersal and previously infested willows and cottonwoods for new evidence of scale,. I Migrant workers had been impacting vegetation and affecting water quality in the southern portion of the restoration site. No site impacts from trespassing were detected, although the trail through coastal sage scrub bordering the restoration site to the west continues to show signs of I recent passage. AMEC and the City will continue to monitor migrant worker activity within the mitigation site. I A section of slope adjacent to the restoration site access road from Faraday Avenue has been eroding and depositing sediment along the access road and in a small portion of the restoration area adjacent to the access road. It is recommended that Native Landscape remove deposited I sediment along the access road and install BMP's (Best Management Practices) to deter additional erosion and deposition. As the rills and gullies along this slope are becoming deep in areas; the installation of fiber rolls and other flow reducing devices may be necessary. This I area will be monitored in future visits to assess the effectiveness of the erosion control treatment. The efficacy of the treatment will not be fully apparent until the winter rainy season, however. I I 320741000-1001/3151-0504L033 Page 2 Ms. Sherri Howard City of Carlsbad 30 August 2004 AMEC will continue horticultura! monitoring visits and submit progress reports for year three in accordance with the project's permits and agreements. If you have any questions, please call Mall Guilliams at (858) 458-9044, extension 328, or email at matt.guilliams@amec.com. Sinc Mall Guilliams; Botanist AMEC Earth & Environmental, Inc. cc: Chris Fromme; Native Landscape, Inc.: File 320741000-1 001/3151-0504L033 Page 3 Ms. Sherri Howard City of Carlsbad 31 August 2004 31 August 2004 Project No. 320741 000-1 001 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): Eighth and Final Horticultural Monitoring Report for Year Three Dear Ms. Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this eighth and final letter report for year three of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project in Carlsbad, California (July 2000). The project is authorized under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, horticultural monitoring visits and reports must be completed monthly for the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits must occur at a minimum of 8 times a year, and a horticultural monitoring report must be completed after each visit. On 16 June 2004, AMEC botanist Matt Guilliams met with City project manager Sherri Howard and Native Landscape president Chris Fromme to survey and evaluate the restoration site. This site visit was the eighth and final horticultural site visit for year three, which ends on 30 June 2004. In general, the restoration site is performing at or above all site success standards for year 5 as established by the Conceptual Wetland Mitigation Plan (Ogden 2000). Native vegetation is well developed throughout a majority of the restoration area and nonnative plants are relatively sparse in distribution. No invasive plant species were detected during the site visit. Wildlife usage of the restoration area has been consistently detected on all horticultural monitoring visits during year three. Most notably, during the seventh monitoring visit a Federally Endangered least Bell's vireo (Vireo be/ill push/us) and a California State Species of Special Concern yellow-breasted chat (Icteria virens) were observed foraging and calling from portions 320741 000-1001/3151-0504L033 Page 1 1 I I I I I I I Li I I I I I I I I I I Ms. Sherri Howard City of Carlsbad 31 August 2004 I of the restoration area. Although the yellow-breasted chat and several other avian species were I observed, the least Bell's vireo was not detected. It is possible that this individual was tending to an active nest within the riparian area and was therefore less vocal and detectable. I Oystershell scale (Lepidosaphes u/mi), a small, inconspicuous insect, was observed on the new growth of several willow species during late fall 2003. No detectable scale dispersal has been observed on most previously infested willows (Salix spp.) and cottonwoods (Populus fremontii I ssp. fremonti,), although evidence of localized scale dispersal was observed during the seventh horticultural monitoring survey on one willow tree along the revegetated access road. It does not appear that the scale noted on this tree has dispersed or proliferated since last observed. I No additional evidence of scale dispersal was observed on other willows and cottonwoods within the restoration area. AMEC will continue to monitor this potential scale dispersal and previously infested willows and cottonwoods for new evidence of scale. I Migrant workers had been impacting vegetation and affecting water quality in the southern portion of the restoration site. No site impacts from trespassing were detected, although the trail through coastal sage scrub bordering the restoration site to the west shows signs of recent and I repeated usage. AMEC and the City will continue to monitor migrant worker activity within the mitigation site. I A section of slope adjacent to the restoration site access road from. Faraday Avenue had been eroding and depositing sediment along the access road and in a small portion of the restoration - area adjacent to the access road. Native Landscape had begun to remove the depositional I .material from the access road before the site survey on 16 June, and was on track to finish BMP installation by the end of the day. Native Landscape planned to install several rows of fiber rolls along the slope and at the base to deter the flow of water and sediment. This area will be monitored during year 4 monitoring visits to assess the effectiveness of this erosion control I . treatment. In October, AMEC will begin horticultural monitoring visits and submit progress reports for year four in accordance with the project's permits and agreements. Annual botanical monitoring is tentatively scheduled for October as well. The annual report will be submitted at the end of the year. If you have any questions, please call Matt Guilliams at (858) 458-9044, extension 328, or email at matt.guilliams@amec.com. Mall Guilhams; Botanist I AMEC Earth & Environmental, Inc. cc: Chris Fromme; Native Landscape, Inc. File I I 320741000.1 001/3151-0504L033 Page 2 I I I I I I Appendix B Photo Viewpoint Locations for 1 2003 and 2004 I I I i I I I I I T-A Photograph Viewpoints2003- 2004 1 F 0 drnec~~- Photograph Viewpoints 2003- 2004 F 1 Photograph Viewpoints 2003- 2004 E ;Oy J\ . ;,.. - • - 'I.". , - - - - Photograph Viewpoints 2003- 2004 ."'M t! - V. -: I NSM '- Ji- I /;\lJ/F iYb f m -.A — Photograph Viewpoints 2003- 2004 I F 19 -i 1 / ,'• / / I r (Ifliv ' V i 1T1eC Photograph Viewpoints 2003- 2004 I H-f : 7 4 1 it :'. • Ii" ,1 •y :' . "5 • : Alz .13 Photograph Viewpoints 2003- 2004 I av a F - .JMDL lw- . i fr1 Ll ,) Ii a r 1Ii1 -. A IJ Transect Photographs 2003 - 2004 ,••4"', .-1 I a a r - 0/IlL w ; /I1 r4: r IT1C Transect Photographs 2003- 2004 C-f I - - - City of Carlsbad Cannon Road Extension Project January 2004 TABLE OF CONTENTS Page PROJECT TIMELINE ................................................................................................................ iiiii EXECUTIVESUMMARY .....................................................................................................ES-i 1.0 INTRODUCTION ............................................................................................................. 1 1.1 Project Location ....................................................................................................1 1.2 Project History ..................................................................................................... 1 1.3 Project Objectives .................................. ............................................................. 4 2.0 SUCCESS STANDARDS...............................................................................................4 3.0 HORTICULTURAL MONITORING.................................................................................6 3.1 Seedling Establishment.......................................................................................6 3.2 Container Plant and Cutting Health.....................................................................8 3.3 Natural Recruitment...........................................................................................10 3.4 Irrigation.............................................................................................................10 3.5 Nonnative Plant Populations ..............................................................................13 3.6 Destructive Human Uses ................................................................... ................. 13 3.7 Pests and Diseases ...........................................................................................14 3.8 Wildlife Habitat Value.........................................................................................15 4.0 BOTANICAL MONITORING ........................................................................................15 4.1 Monitoring Methods ............................................................................................. 16 4.2 Analysis of Botanical Monitoring.........................................................................16 4.2.1 Percent Cover ........................................................................................16 4.2.2 Tree Heights...........................................................................................19 5.0 EVALUATION OF RESTORATION SUCCESS AND RECOMMENDATIONS .............20 5.1 Evaluation of Restoration Success.....................................................................20 5.2 Recommendations for Year Three .....................................................................20 6.0 REFERENCES .............................................................................................................. .21 319721000-1007/3151-0104R008 Page p I City of Carlsbad Cannon Road Extension Project January 2004 I LIST OF FIGURES I Figure 1 Regional Location Map .............................................................................................2 Figure 2 Cannon Road Wetland Mitigation Site Location ........................................................3 Figure 3 Cannon Road Wetland Mitigation Site Photo Viewpoint Locations............................7 I Figure 4 Cannon Road Wetland Mitigation Site Transect Locations and Photograph Locations.................................................................................................................17 LIST OF TABLES Table 1 Success Standards for the Cannon Road Wetland Mitigation Site ............................5 Table 2 Species Detected from the Seed Mix on the Cannon Road Wetland Mitigation Site...........................................................................................................................8 Table 3 Container Plant and Cutting Survival for Cannon Road Wetland Mitigation Site........9 Table 4 Species Detected at the Cannon Road Wetland Mitigation Site..............................11 Table 5 Plant Species Cover of the Cannon Road Wetland Mitigation Site..........................18 Table 6 Average Heights of Container Plants for the Cannon Road Wetland Mitigation Site.........................................................................................................................19 LIST OF APPENDICES Appendix A Correspondence ..............................................................................................A-i Appendix B Photo Viewpoint Locations for August 2001 and October 2002........................B-i Appendix C Photo Documentation at Transect Locations .................................................... C-i AppendixD Raw Botanical Data .......................................................................................... D-i 319721000-1007/3151-0104R008 Page ii City of Carlsbad Cannon Road Extension Project January 2004 Cannon Road Extension Project Wetland Mitigation PROJECT TIMELINE MONTH YEAR J F M A M J J A S 0 N D 2001 Ic EC 2002 M R M, R 2003 Ow 2004 M 2OO5 M 2006 M RT FT Completion of maintenance and monitoring period by AMEC to date IC = Completion of installation of the mitigation program EC = Completion of the 120-day establishment period and beginning of the 5-year maintenance and monitoring period M = Annual botanical monitoring R = Annual report due OW = Irrigation turned off RT = Final report and termination of the maintenance and monitoring period 319721000-1007/3151-0104R008 Page iii I City of Carlsbad Cannon Road Extension Project I January 2004 EXECUTIVE SUMMARY This is the second annual report of the wetland mitigation monitoring program for the temporary wetland impacts associated with the construction of Macario Bridge within Reach 1 of the I Cannon Road Extension Project. AMEC Earth & Environmental, Inc. is the biological consulting firm responsible for the 5-year monitoring of the wetland mitigation site. A total of 2.58 acres of southern willow scrub and freshwater marsh were temporarily impacted I during the construction of Macario Bridge. Of the 2.58 acres, approximately 0.68 acre was temporarily impacted during the construction of project access roads and staging areas. I Another 1.9 acres were temporarily impacted during bridge construction and through the shading of native riparian vegetation under Macario Bridge. The wetland mitigation site consists of a revegetated access road, the area underneath Macario Bridge, and a revegetated slope in the northeastern portion of the wetland mitigation site. U All year two success standards for the wetland mitigation site have been achieved or surpassed. Year five success standards have already been achieved for percent vegetative cover and I survival of container plants and cuttings. Total percent vegetative cover in the wetland mitigation site is 115.4 percent with 109.7 percent attributable to native plant species. The native cover is largely attributed to arroyo willow (Salix lasiolepis), tall cattail (Typha latifolia), I California bulrush (Scirpus californicus), and black willow (Salix gooddingii). These species have readily colonized the wetland mitigation site. Nonnative weed populations account for only 5.8 percent of the total cover, a decrease of approximately 3 percent from year one values. Only 0.6 percent of absolute vegetative cover is attributable to potentially invasive plant species. These potential invasive plant species were carefully monitored and controlled throughout the monitoring period. In addition, year five success standards have been achieved for container I plant and cutting survival, with approximately 95 percent of tree container plants, 89 percent of shrub container plants, and 89 percent of cuttings alive and healthy. I For year two, there are no success standards for tree heights; however, narrow-leaved willow (Salix exigua), black willow, arroyo willow, and blue elderberry (Sambucus mexicana), have achieved or are close to achieving the height success standard for year five. I Although the success standard for percent cover outlined in the Conceptual Wetland Mitigation Plan has been achieved (Ogden 2000), there are three areas in the wetland mitigation site that I have low vegetative cover. These areas, totaling 0.05 acre, are located underneath Macario Bridge and on the revegetated access road. Although vegetation in these areas has developed over the current monitoring period, high levels of salt, soil compaction, and higher topography I have reduced seedling germination and limited plant growth rates. The following remedial measures are recommended for the site for year three of the Cannon Road Extension Project wetland mitigation monitoring program: I . Continue to monitor the wetland mitigation site, especially with respect to water availability/stress, as it is no longer receiving supplemental irrigation. I . Continue to monitor all areas infested with oyster-shell scale. Respray with Malathion if new infestations are located and/or old infestations remain problematic. Continue to monitor illegal usage of the wetland mitigation site by migrant workers. 319721000-1007/3151-0iO4R008 I Page ES-1 I City of Carlsbad Cannon Road Extension Project January 2004 1.0 INTRODUCTION This is the second annual monitoring report of the wetland mitigation monitoring program for the temporary wetland impacts associated with the construction of Macario Bridge in Reach 1 of the Cannon Road Extension Project in San Diego County, California (Figure 1). The Cannon Road Extension Project consists of the construction of a four-lane arterial road from Car Country Drive to El Camino Real. The project is broken into two parts: Reach 1 and Reach 2. Reach 2 of the Cannon Road Extension Project, which will not be discussed in this report, begins where Reach 1 meets Faraday Avenue and extends east to El Camino Real (Figure 1). AMEC Earth & Environmental, Inc. (AMEC) is the biological consulting firm responsible for the 5-year monitoring of the wetland mitigation site. The project is authorized under the U.S. Fish and Wildlife Service (USFWS) Biological Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers (ACOE) Permit Application No. 97-20130-TCD and 97-20131-TCD, City of Carlsbad (City), California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. 1.1 Project Location Reach 1 of the Cannon Road Extension Project and the wetland mitigation site associated with the construction of Reach 1 are located south of Agua Hedionda Lagoon between Interstate 5 and Faraday Avenue in Carlsbad, California (Figure 2). Reach 1 extends from Car Country Drive onto the mesa above Agua Hedionda Lagoon and traverses Macario Canyon near its confluence with the lagoon basin. Reach 1 of Cannon Road crosses Macario Canyon on Macario Bridge and terminates on the eastern canyon rim. 1.2 Project History Installation of the wetland mitigation site began in January 2001 and was completed in March 2001. The 120-day maintenance period began the end of March 2001 and ended in July 2001. Valley Crest, the landscape maintenance contractor during this time, performed the installation and 120-day maintenance of the wetland mitigation site under the direction of the consulting firm Dudek and Associates (Dudek). The maintenance and monitoring period began in July 2001 following the inspection meeting on 23 July 2002. In August 2002, AMEC began monitoring the wetland mitigation site and Native Landscape, Inc., the landscape maintenance contractor, began maintenance of the wetland mitigation site. During year one, AMEC completed monthly horticultural monitoring visits, an annual botanical monitoring visit, and submitted letter reports and the First Annual Report to the City. AMEC has continued horticultural and botanical monitoring of the project area and has submitted letter reports to the City during the current monitoring period. This Second Annual Report summarizes all project-related activities and site progress during 2003. Official project correspondence for the monitoring program is included at the end of this report (Appendix A). 319721000-1007/3151-0104R008 Page 1 I I I I I I I I I I I I I LI I I 76 Oceanside \ y\ San gviar4s tlL I Carlsbad conuutdo - tLocatwn j0 0 78 S \ \ HEncinita SA5 0 Vol . S6 Beach le- ar I - 54 5 UITOSG EE'_ 67 .-.. •.• 52 4664 Salitee 7 ti N 12 .-Goroi-za 75 - - - - Map Notes S' WAI Projection: Stateptane (Zone 6), NAD83, Feet \ "C11u(a '1lista Base Data: SANDAG - County Boundaries. Places Caltrans Data:\iz1fBeacc_'—' ' Current Freeways - - - _ ___ Miles C l _________ CO•' ._-- 0 1 2 3 4 5 8 J:/gisl4lcannon/arcmap/regional_Iocation.mxd 03/24104 INN -I I ameeR. Regional Location Map FIGURE II IfF Ell to MrW I . MI- I I 4' I I ' I • I i .. 'ft.4t • '• L - . ' L. t. -. ) rti • : t 0 - .._ 4\ _)• XA Li .- .•.; __________________ oo Feet _ Map Notes 500 250 0 500 SANDAG- 2000 2-fool resolution, 3-band, i false color infra-red imagery L \ •, - S •S .• : : City of Carlsbad Cannon Road Extension Project January 2004 1 1.3 Project Objectives I A total of 2.58 acres of southern willow scrub and freshwater marsh were temporarily impacted during the construction of Macario Bridge. Of the 2.58 acres, approximately 0.68 acre was temporarily impacted during construction of project access roads and staging areas. Another I 1.9 acres were temporarily impacted during bridge construction and through the shading of native riparian vegetation under Macario Bridge. The wetland mitigation site consists of a revegetated access road, the revegetated area underneath Macario Bridge, and a revegetated I slope in the northeastern portion of the wetland mitigation site. The goal of the wetland mitigation program is to restore the site to preexisting riparian and I wetland habitat functions and values. The overstory of the restored habitat is to be dominated by willows (Salix sp.), mulefat (Baccharis salicifolia), and blue elderberry (Sambucus mexicana). The understory is to be dominated by arrow weed (Pluchea sericea), California wild rose (Rosa l californica), California blackberry (Rubus ursinus), Douglas mugwort (Artemisia douglasiana), San Diego sagewort (Artemisia pa/men), western ragweed (Ambrosia psilostachya), yerba mansa (Anemopsis ca/ifornica), Mexican rush (Juncus mexicanus), and great marsh evening- primrose (Qenothera elata ssp. hirsutissima). Maintenance and monitoring of the mitigation site is ongoing throughout each year of the I project. Maintenance activities such as nonnative weed control occur at appropriate times of the year by the landscape maintenance contractor. Qualitative horticultural monitoring occurs 12 times a year on a monthly basis in years one and two and 8 times a year for years three through five. Botanical monitoring occurs annually to quantitatively assess the status of the wetland mitigation site with the success standards. Remedial measures will be implemented in the fall or winter of each year or if a vegetation community is not satisfying interim performance goals and is considered to be deficient for achieving final success standards in year five. Success standards for the wetland mitigation site are outlined in the Conceptual Wetland I Mitigation Plan (Ogden 2000). The success standards are specific percentages of native plant cover, container plant and cutting survival, and tree heights to be achieved through the mitigation. The City will have achieved the goals outlined in the mitigation plan when these I success standards have been met for the wetland mitigation site. If the wetland mitigation site meets success standards before year five and all parties agree, early acceptance of the project may be granted. 2.0 SUCCESS STANDARDS I Success standards are a set of yearly performance standards for evaluating the wetland mitigation site's progress. These success standards will be evaluated to determine when to implement remedial measures to correct deficiencies in project progress. The qualitative I horticultural monitoring data and quantitative botanical monitoring data collected will be analyzed against these success standards, which are outlined in Table 1. I - 319721000-1007/3151-0104R008 Page 4 r H I I [1 U I City of Carlsbad Cannon Road Extension Project January2004 I Table 1 I Success Standards for the Cannon Road Wetland Mitigation Site Standard IRemedial Measure if Standard Not Met Year One 50% visual ground cover Reseed/replant, substitutions possible Establishment of all species planted or seeded Reseed/replant, substitutions possible 90% healthy container plants Replace with same species/size 80% healthy cuttings Year Two - All trees of acceptable growth rate in height Mulch and/or fertilizer may be recommended by the restoration biologist 90% survival of tree container plants' 80% survival of shrub container plants' Replant with same species/size 80% survival of cuttings 70% total visual ground cover for all species Additional seed or container plants as recommended combined by restoration biologist Years Three through Five Height standards met for all trees Replant or receive remedial measures Tree Height Standards2 Year Three Year Four Year Five Black willow (1 gallon) 8 10 12 Arroyo willow (1 gallon) 8 10 12 Narrow-leaved willow (1 gallon) 4 6 8 Blue elderberry (1 gallon) 4 5 6 90% survival of tree container plants' 80% survival of shrub container plants' Replant with same species/size 80% survival of cuttings 75% cover by all species in year three 0 cover b i 3 80/0 y all species n year four Additional seed or container plants as recommended • by restoration biologist 90% cover by all species in year five Irrigation will gradually be withdrawn from the mitigation area during years three and four. No further irrigation will be applied after year 4. For the project to be considered successful, plants must survive one full dry season without supplemental irrigation. At the discretion of the restoration biologist, dead container plants can be mitigated for by naturally invading seedlings, if such seedlings are within 5 feet of the original plants and of similar species or habitat value. 2 All heights given in feet. Cover of freshwater marsh species is acceptable in place of southern willow scrub species. I H 319721000-1007/3151-0104R008 Page 5 F I City of Carlsbad Cannon Road Extension Project i Jan6ary2004 3.0 HORTICULTURAL MONITORING I AMEC continued horticultural monitoring of the wetland mitigation site during 2003 as outlined in the mitigation plan (Ogden 2000). Horticultural monitoring at the site included a qualitative I .assessment of the following parameters: irrigation, seedling establishment, container plant and cutting health, natural recruitment, nonnative plant populations, pests and diseases, destructive human uses, and wildlife habitat value. I Monitoring also included photo documentation of the wetland mitigation site. Representative locations, identified in Figure 3, were chosen to provide photographic overview of the wetland I mitigation site's progress over the 5-year maintenance and monitoring program. These photographs were taken during botanical monitoring visits in 2002 and 2003 (Appendix B). I The following section includes a discussion of each horticultural parameter followed by an overall assessment of the wetland mitigation site in relation to the parameter. I HORTICULTURAL PARAMETERS 3.1 Seedling Establishment I Seedling germination and establishment are based on a variety of factors, including seasonal rainfall, aspect, soil disturbance, proximity to nonnative invasive plant species, seed viability, I and timing of seeding. Evaluation of this parameter includes identifying seedlings of the species included in the native seed mix and following their growth and establishment. Establishment of seeded species, both with respect to diversity and density of individual species, has been very I good this year, with many seedlings developing into mature shrubs. The wetland mitigation site has progressed favorably in year two with excellent native seedling I establishment and recruitment (Appendix B, Figures B-i through B-8). The density of seedlings observed during horticultural monitoring surveys has decreased slightly from year one values. This is anticipated, however, as seedlings that established during year one begin to compete I more effectively for limited resources. Nonnative and invasive species did not affect seedling establishment in year two. I The original seed mix used at the mitigation site included western ragweed, yerba mansa, Douglas mugwort, San Diego sagewort, mulefat, and great marsh evening-primrose. All of these species have established and were detected with the wetland mitigation site (Table 2). I Mexican rush was not detected in the wetland mitigation site since it was not included in the seed mix. All species in the seed mix established in the wetland mitigation site in year one, thus satisfying the seedling establishment success criterion. There are no specific success standards established for seedling establishment in year two. I I 319721 000-1007/3 151-01 04R008 i Page 6 r - I I•1 : :,: . 1.. 4 I. - : • 4 - a - /1 •. :. :- / 01 j . . —.,-: - r - •;,. - - :: oo > , •- 1 I - ,-. I p a • -•• 4 . •-. • I 10 . ..U. I.— • . 4 ' - . a . •j o ' .•\ 7• IL lk •. 4 -- 4. -• 4.., -: — - N a -- . - • - S Feet 100 200 I'I II u - I••* - •' r • '- --4 I - ____________ , : . • City of Carlsbad Cannon Road Extension Project January 2004 Table 2 Species Detected from the Seed Mix on the Cannon Road Wetland Mitigation Site October 2003 Scientific Name Common Name Detected within the Site Ambrosia psilostachya western ragweed X Anemopsis californica yerba mansa X Artemisia douglasiana Douglas mugwort X Artemisia palmed San Diego sagewort X Baccharis salicifolia mulefat X Juncus mexicanus Mexican rush Not planted Qenothera elata ssp. hirsutissima evening primrose X Nomenclature follows Simpson et al. 2001. Additional seed was distributed at the southern terminus of the revegetated access road and along the central portion of the road in areas that were low in vegetative cover. The seed was planted as a remedial measure to encourage seedling establishment and recruitment. It was also anticipated that the established vegetation would aid in deterring use of the wetland mitigation site. Seed was also applied in the central portion of the revegetated access road and underneath Macario Bridge in 2002 as a remedial measure. 3.2 Container Plant and Cutting Health The health of container plants and cuttings is visually assessed for container plants and cuttings installed within the wetland mitigation site. If plants appear to be in poor health, remedial measures can be recommended. Dudek conducted a 120-day dead plant count in June 2001 and some dead container plants were replaced after this period. Approximately 1,074 one-gallon container plants and 513 cuttings were planted in the wetland mitigation site. These included 45 Fremont cottonwood (Populus fremonti,), 100 narrow-leaved willow (Salix exigua), 158 black willow (Salix gooddingi,), 175 arroyo willow (Salix lasiolepis), 62 blue elderberry, 184 mulefat, 42 arrow weed, 140 California wild rose, and 168 California blackberry container plants as well as 258 mulefat and 255 arroyo willow cuttings. During October 2002, all container plants and cuttings were counted. Approximately 7 percent were in poor health or had died. Container plant mortality was highest for California wild rose and California blackberry. Poor health was observed in a significant number of California wild rose, California blackberry, and Fremont cottonwood container plants. Mortality and poor health were attributable to a high salt concentration in the soil in some portions of the wetland mitigation site and exposure to direct sunlight and heat. California wild rose and California blackberry, typical components of a riparian understory, cannot tolerate direct sunlight. These two species were healthy where they occurred beneath other vegetation in the wetland 319721000-100713151-0104R008 Page 8 I I Li I I I I I I I I I I 1 I City of Carlsbad Cannon Road Extension Project i January 2004 mitigation site. The Fremont cottonwood had burned from the high salt concentration in some of the areas where this species was planted. Container plant and cutting survival for year two was evaluated on 30 October 2003. The I project area was traversed on foot by two AMEC biologists. The health of each species and numbers of dead container plants and cuttings were noted. Given the significant amount of natural recruitment (discussed in Section 3.1.3) and the growth of existing planted individuals, ' the number of dead plants observed during 2003 most likely underestimates total container and cutting plant mortality. However, dead individuals noted during 2002 may have been recounted in 2003, thus artificially increasing mortality figures. Despite these confounding factors, the I mitigation site has surpassed all success standards for plant survival associated with year two. Success standards for year two require that 90 percent of tree container plants and 80 percent I of shrub container plants and cuttings survive. Approximately 5 percent of tree container plants are dead, and 95 percent of tree container plants are alive and healthy. Approximately 11 percent of shrub container plants are dead, and 89 percent of shrub container plants are alive I and healthy. Approximately 11 percent of cuttings are dead, and 89 percent of cuttings are alive and healthy. There is an overall 9 percent combined total of the container plants and cuttings that are dead, and a 91 percent combined total of container plants and cuttings that are alive I and healthy (Table 3). The container plant and cutting health success standards for year two have not only been achieved but surpassed. I Table 3 Container Plant and Cutting Survival for Cannon Road I Wetland Mitigation Site November 2003 Species Common Name Type Number Planted Mortality 2002 Mortality 2003 Cumulative Mortality Number Dead Percent Number Dead Percent Total Dead Percent Baccharissalicifo!ia mulefat cuttings 258 13 5.0% 8 3.1% 21 8.1% Baccharissalicifolia mulefat 1-gallon 184 1 0.5% 0 0.0% 1 0.5% Pluchea sericea arrow weed Liners 42 0 0.0% 0 0.0%1 0 0.0% Populusfremontii Fremont cottonwood 1-gallon 45 2 1 4.4% 4 8.9% 6 13.3% Rosa californica California wild rose 1-gallon 140 21 15.0% 3 2.1% 24 17.1% Rubusursinus California blackberry 1-gallon 168 30 17.9% 3 1.8% 33 19.6% Salixexigua narrow-leaved willow 1-gallon 100 2 2.0% 1 1.0% 3 3.0% Salixgooddingii black willow 1-gallon 158 5 3.2% 1 0.6% 6 3.8% Salixiasiolepis arroyo willow cuttings 255 1 15 5.9% 20 1 7.8% 35 13.7% Salix lasiolepis arroyo willow 1-gallon 175 1 4 2.3% 6 3.4% 10 5.7% Sambucus mexicana blue elderberry 1-gallon 62 2 3.2% 0 0.0% 2 3.2% Unknown 1-gallon 6 0 6 Total 1,587 101 6.4% 46 2.9% 147 9.3% Total Tree Container Plants 540 15 2.8% 12 2.2% 27 5.0% Total Shrub Container Plants 534 1 52 9.7% 6 1.1% 58 10.9% Total Cuttings 513 1 28 5.5% 28 5.5% 56 10.9% 319721000-1007/3151-0104R008 Page 9 I Li I I I I I I City of Carlsbad Cannon Road Extension Project January 2004 3.3 Natural Recruitment In addition to planting and seeding activities, plants establishing on-site can originate from several sources, including propagules that are transported to the site by wind, water, or animal vectors. Similarly, seeds may already occur in the soil prior to restoration activities. This natural recruitment plays an important role in increasing the diversity and density of native plant species within the restoration area. This is particularly true for this wetland mitigation site since it is surrounded by healthy, well-established upland and riparian native habitats that serve as potential source populations for incoming seed. Evaluation of this parameter involves identifying germinating seedlings or volunteers that were not included in the seed mix. Natural recruitment can also occur when native species that are seeded or planted within an area produce seed on their own, thereby increasing the density of that particular species within the restoration area. A. number of native annual and perennial species produced seed this year within the wetland mitigation site. This continuing input of native seed contributes to the recruitment of native plant species across the wetland mitigation site. A total of 62 plant species hae been observed at the wetland mitigation site through year two (Table 4). This includes 40 native species of which about half have colonized the site through natural recruitment. Species diversity is high for year two at the wetland mitigation site and indicates the wetland mitigation site, as a whole, is performing well. The high diversity can be attributed to several factors: the presence of three vegetation associations (freshwater marsh, southern willow scrub, and coastal sage scrub) on and surrounding the wetland mitigation site, seeds from container plants and cuttings, seeds present in the soil, and seeds carried in from adjacent native habitats. Many obligate and facultative indicator wetland species not included in the seed mix were noted as occurring within the wetland mitigation site in the first annual report. These species, including alkali bulrush (Scirpus maritimus), small-fruited bulrush (Scirpus microcarpus), California bulrush (Scirpus californicus), spike rush (Eleocharis sp.), cattail (Typha latifolia), salt marsh fleabane (Pluchea odorata), pickleweed (Salicornia virginica), southwestern spiny rush (Juncus acutus ssp. IeopoIdii), and fireweed (Epiobium diiatum spp. diiatum), are naturally establishing, providing seed, and contributing to native cover in the wetland mitigation site. 3.4 Irrigation Irrigation is often supplied to restoration sites to encourage establishment and growth of vegetation and to ensure survival of established seedlings and cuttings. Irrigation is usually supplied to a site during the first 2 to 3 years and sometimes continues into the fourth or fifth year depending on the vegetative establishment and success at the site. Supplemental irrigation was used throughout the mitigation site to encourage plant growth and survival. Irrigation was turned off throughout a majority of the site on 1 June 2003 when it was deemed unnecessary for continued site success. Supplemental irrigation continued along the revegetated access road during most of year two to discourage foot traffic and vagrancy. Supplemental irrigation was turned off in this area on 6 October 2003, as the dense vegetation occurring along the revegetated access road was sufficient to discourage illegal usage of the mitigation site. In summary, a majority of the mitigation site has been off supplemental irrigation 319721000-1007/3151-0104R008 Page 10 I [, I I I I I 1 Li Li I I I I I I I I I I City of Carlsbad Cannon Road Extension Project January 2004 Table 4 Species Detected at the Cannon Road Wetland Mitigation Site July 2001 - October 2003 Scientific Name Common Name Ambrosia psiostachya* western ragweed Anagallis aivensis 0 scarlet pimpernel Anemopsis californica* yerba mansa Apium graveolens wild celery Artemisia californica* California sagebrush Artemisia douglasiana* mugwort Artemisia palmed' San Diego sagewort A triplex semibaccata Australian saltbush Baccharis pllularis* coyote bush Baccharis salicifolia* mulefat Brassica nigra black mustard Centaurea melitensis tocalote Chenopodium sp. pigweed Cortaderia selloana pampas grass Cotula coronopifolla African brass buttons Deinandra fasciculata* tarplant Deinandra paniculata* tarplant Digitaria sanguinalis crab grass Eleocharissp.* spike rush Encelia californica* California encelia Epiobium diiatum ssp. ciliatum* willow herb Eriophyllum con fertfflorum* golden yarrow Foeniculum vulgare wild fennel Gnaphalium sp. everlasting Gnaphalium bicolor cudweed Gnaphalium californicum* California everlasting Isocoma menziesii* coastal goldenbush Juncus acutus ssp. leopoldii* southwestern spiny rush Heliotropium curassivicum * salt heliotrope Lepidium latifolium perennial pepperweed Lotus scoparius* deerweed 319721 000-1 007/3151-0104R008 Page 11 City of Carlsbad Cannon Road Extension Project January 2004 Table 4 (Continued) I Species Detected at the Cannon Road Wetland Mitigation Site July 2001 - October 2003 Scientific Name Common Name Lythrum hyssopifolium grass poly Marrubium vulgare horehound Melilotus indica yellow sweet clover Nassella pulchra* purple needle grass Oenothera elata ssp. hirsutissima* great marsh evening-primrose Picris echioides bristly ox-tongue Plantago sp. plantain Pluchea odorata* saltmarsh fleabane Pluchea sericea* arrow weed Polypogon monspeliensis rabbitfoot grass Populus fremontii* Fremont cottonwood Ricinus communis castor bean Rorippa nasturtiumaquaticum* water cress Rosa californica* California wild rose Rubus ursinus* California blackberry Rumex crispus curly dock Salicornia virginica* pickleweed Salix exigua* narrow-leaved willow Salix gooddingii* black willow Salix !asiolepis* arroyo willow Salsola tragus Russian thistle Sambucus mexicana Mexican elderberry Scirpus californicus* California bulrush Scirpus maritimus* alkali bulrush Scirpus microcarpus* small-fruited bulrush Solanum xant1 purple nightshade Sonchus asper . prickly sow thistle Sonchus oleraceus common sow thistle Tamarix sp. saltcedar Typha IatifoIia* tall cattail Xanthium strumarium* cocklebur Nomenclature follows Simpson et al. 2001 Denotes plant species native to southern California. 319721000-1007/3151-0104R008 Page 12 I I I I I I I I I I I I I I L i d City of Carlsbad Cannon Road Extension Project January 2004 I since 1 June 2003, and the entire mitigation site has been off irrigation since 6 October 2003. I The mitigation site will be closely monitored during year three to evaluate plant health with respect to water availability. Unless detrimentally affected, no additional irrigation will be used at the mitigation site. I 3.5 Nonnative Plant Populations Control of nonnative plant populations is one of the most important factors in the success of any restoration project because invasive and nonnative plants prevent the establishment of native species by competing with them for important resources (Bossard et al. 2000). Maintenance weeding concentrated on invasive weed species, such as bristly ox-tongue (Picris echioides), wild fennel (Foeniculum vulgare), pampas grass (Cortaderia selloana), saltcedar (Tamarix sp.), and perennial pepperweed (Lepidium latifolium), which pose a threat to native plant establishment. Several nonnative plant species, such as rabbitfoot grass (Polypogon monspeliensis) and African brass buttons (Cotula coronopifolia), which are not considered invasive, were left in the wetland mitigation site. It was assumed, based on past experience, that these two species would not compete with the native riparian species in the wetland mitigation site and that, over time, they would not be a major component in the wetland mitigation site. Maintenance weeding was completed with manual and mechanical techniques, and herbicides were applied where deemed effective in the wetland mitigation site. Scattered bristly ox-tongue, pampas grass, and saitcedar resprouted in the wetland mitigation site during year two. These species, hand pulled or sprayed with herbicide, are not anticipated to become a significant problem at the wetland mitigation site as long as weeding continues to occur regularly. Perennial pepperweed, a highly invasive herbaceous perennial, was observed in two isolated patches. Upon discovery, these small patches were immediately hand-weeded and treated with herbicide. No additional plants have been observed since treatment. 3.6 Destructive Human Uses During year one monitoring, bicycle and motorcycle tracks were observed in the wetland mitigation site, creating trails and thereby injuring or killing vegetation. In addition, a homeless encampment had been established in the southern portion of the wetland mitigation site. The City sent a representative to the homeless encampment several times to inform the inhabitant(s) to vacate the wetland mitigation site, and the encampment was eventually abandoned. Destructive human use of the wetland mitigation site has been a major focus of City resources and attention during the second year of monitoring. Motorized and nonmotorized vehicle use has been eliminated due to the maturation of the vegetation within and adjacent to previously used trails. Although the homeless encampment was vacated in October 2002, usage of the southern terminus of the revegetated access road continued in 2003. Migrant workers were using this portion of the wetland mitigation site to bathe and wash clothing. To discourage usage, the City extended existing fencing in this area and installed new fencing at the northern• terminus of the access road where it merges with the remainder of the project area. Twenty 1-gallon southwestern spiny rush container plants were installed along the extended fenceline in the southeastern corner of the project area. Once grown, these plants will be painful to walk through, discouraging trespassers from bypassing the fence where it meets with vegetation. A 319721000-1007/3151-0104R008 Page 13 1 I I I I P I I I I I I I I City of Carlsbad Cannon Road Extension Project I January 2004 small portion of the access road used for bathing and washing clothes was lowered in I elevational grade to permit the pooling of water along currently utilized trails. In addition, the City posted signs. in Spanish informing readers of the nature of the project area access restriction. The cumulative effect of these actions has been the gradual abandonment of the mitigation site I by former trespassers. As of the final horticultural monitoring visit in December 2003, no signs of usage or trespassing were observed. 1 3.7 Pests and Diseases A number of animal or insect species can become pests within restoration sites if their I populations are not controlled or measures are not initiated to reduce their effect. Similarly, some plant diseases can have a devastating effect if the symptoms are not identified early and remedial actions are not employed. Many of the pests and diseases observed in restoration I sites are naturally occurring and are often seasonally fluctuating events. A proactive management program identifies and evaluates these issues, providing remedial measures when site success is jeopardized. I Pests have become a larger problem in year two. Herbivory by rabbits and gophers utilizing the wetland mitigation site has reduced the overall health of some individuals, although no plant I deaths were directly attributable to browsing by herbivores. These mammals tended to favor narrow-leaved willow seedlings, saplings, and cuttings. Of greater concern is a persistent infestation of oyster-shell scale (Lepidosaphes u/mi) among willows and cottonwoods within the I access road portion of the wetland mitigation site. Although scale species occur naturally throughout most riparian systems, heavy scale infestations have substantially reduced the health of many otherwise healthy willows along the revegetated access road, in some instances I causing death. Plant-tek, a landscape pest management company, contained one outbreak of scale with the application of horticultural oil during spring 2003. Horticultural oil was used over chemical control methods as the required treatment coincided with the bird-breeding season. In I fall 2003, scale was once again noticed on new growth of willows in the revegetated access road. The City contracted Plant-tek to spray the oyster-shell scale with Malathion, an organophosphate insecticide. This chemical was sprayed for mosquito abatement in lagoons in I San Diego County and has been shown to have a short half-life and be relatively safe for application near non-target organisms (e.g., birds, mammals). On 9 December 2003, Plant-tek applied Malathion directly to the infested trees, thereby minimizing the quantity of chemical I released into the project area. The effect of the pesticide application on the scale will be evaluated during late winter and early spring horticultural monitoring visits. I Two diseases, sooty mold and powdery mildew, were located on Douglas mugwort and western ragweed in a small area in the southwestern portion of the wetland mitigation site. Sooty mold is a fungus that appears as a black coating on the leaves and stems of plants. Sooty mold can I develop on plants that have infestations of arthropods such as aphids, whiteflies, and scales. These invertebrates secrete honeydew, the primary food source of sooty mold, on the leaves and stems of host plants. Sooty mold can be controlled once the insect responsible for the I honeydew secretions is identified. Sooty mold can kill a plant in extreme cases. Powdery mildew is a white, patchy fungus that coats the leaves of some plants. It occurs on plants in areas with high relative humidity or site conditions that promote these conditions such as close spacing of I 319721000-1007/3151-0104R008 Page 14 I City of Carlsbad Cannon Road Extension Project January 2004 I plants, densely growing plants, or shade. Powdery mildew can kill a plant in extreme cases (Jett I 2002; Cornell University 2002). Although pests and diseases have been identified in the wetland mitigation site, no additional I corrective actions are recommended as the City and AMEC have made several attempts at controlling/eliminating pests in the wetland mitigation site. AMEC will continue to monitor the small mammal herbivory, sooty mold, and powdery mildew to see if they become significant I issues. Scale will be monitored on a regular basis to determine whether additional control measures are required. I 3.8 Wildlife Habitat Value The quality of habitat within the wetland mitigation site has improved dramatically during year two monitoring. The freshwater marsh component of the project area is approaching late-seral I stage species composition and overall vegetative density. Through the growth of maturing container plants and high levels of natural recruitment, southern willow scrub habitat has I become dense in many areas of the wetland mitigation site. Although slower to develop, the revegetated coastal sage scrub area in the northeastern region of the project area has matured as expected considering it has been planted for only 2 years. The overall wildlife habitat quality of the wetland mitigation site is moderate for open-habitat specialists and moderate to high for I more closed-habitat specialists. The wetland mitigation site cover ranges from moderately dense with occasional openings in the revegetated access road to closed in the middle portion under the Macario Bridge. Common wildlife species using the wetland mitigation site include pacific treefrog (Hyla regila), lesser goldfinch (Carduelis psaltria), mourning dove (Zenaida macroura), black phoebe (Sayornis nigricans), mice (Chaetodipus sp.), coyote (Canis latrans), and bobcat (Fe/is rufus). Several sensitive wildlife species have also been using the wetland mitigation site including coastal California gnatcatcher (Polioptila californica californica), white tailed kite (Elanus leucurus majusculus), red-tailed hawk (Buteo jamaicensis), and northern harrier (Circus cyaneus). Potentially suitable habitat exists for southwestern willow flycatcher (Empidonax trail/ii extimus), I light-footed clapper rail (Rallus longirostris levipes), and least Bell's vireo ( Viréo be/li! push/us). Least Bell's vireo has been documented as nesting in Macario Canyon for the past several years (Ogden 2000). In 2003, one least Bell's vireo was detected in the mature southern willow I scrub adjacent to the wetland mitigation site, which most likely foraged in the wetland mitigation site along the revegetated access road. This individual was detected on 20 March 2003. I I 4.0 BOTANICAL MONITORING The line intercept method was utilized to collect the absolute percent cover of plant species in I the wetland mitigation site and tree heights were collected within belt transects established as part of the line intercept method. The quantitative data were used to evaluate the performance of the wetland mitigation site in terms of the project success standards. I I 319721000-1007/3151-0104R008 i Page 15 I City of Carlsbad Cannon Road Extension Project January 2004 I I 4.1 Monitoring Methods I Botanical data were collected on 23 and 30 October 2003. Six 30-meter by 3-meter belt transects were established in the same transect locations used in botanical monitoring for year one (Figure 4). The transect locations were initially determined by randomly choosing a number I on the x- and y-axes for the beginning of each transect. Transects one and two are located on the revegetated access road. Transects three through six are located in the wetland mitigation site underneath and adjacent to Macario Bridge. Transects three and four are on the east side I of the wetland mitigation site. Transects five and six are on the west side of the wetland mitigation site. To ensure transects can be located in future years, the origin and terminus of each transect were marked with 5-foot PVC pipe and labeled with pink flagging. Documentary I photographs were taken from the beginning of each transect facing in the direction in which the data were collected (Appendix C). I AMEC used the line intercept method to measure absolute percent cover of all plant species encountered. The linear extent to which each species intersected the transect was recorded directly into a handheld computer. All plant species were identified to genus and species when I possible. Absolute percent cover was calculated for the transects. Absolute cover measures the canopy cover of all layers of vegetation, taking into account the overlapping characteristics of many herbs, shrubs, and trees. Bare ground and litter were also recorded. Absolute percent I cover will be referred to as percent cover for the remainder of this report. The data were analyzed to provide total cover of native and nonnative species, including a breakdown by each species. Raw botanical data are included in Appendix D. I Belt transects were established on the same measuring tape used to collect percent cover. Three meters were measured on the east side of the tape to create the belt transects on I .transects 1 and 2 and on the north side for transects 3 through 6. All belt transects were 30 meters in length. All container trees within the belt transect were measured in meters using a tree height measurement device. Pink flagging was tied onto each tree that was measured so I that the same trees can be measured in the future, although it is understood that sample size may vary from year to year. The tree height data were analyzed to calculate average height. 4.2 Analysis of Botanical Monitoring 4.2.1 Percent Cover Total percent cover in the wetland mitigation site is 115.4 percent with 109.7 percent attributable to native plant species (Table 5). Total percent cover for the wetland mitigation site is I performing above the year five success standard of 90 percent cover for a second consecutive year (Table 1). Native vegetative cover is largely attributed to arroyo willow, tall cattail, California bulrush, and black willow. These species have readily colonized the wetland U mitigation site. Nonnative weed populations account for only 5.8 percent of the total cover, a decrease of approximately 3 percent from year one values. The majority of the nonnative cover (4.8 percent) is attributable to rabbitfoot grass, a noninvasive, nonnative species. I 319721000-1007/3151-0104R008 I Page 16 ) . I FJTL / / J f r iøi k I' Inu Transec Nk t4 I A Photograph-4 Transect go e- Transect-1 Photogra -1 ph . ) i. / 1r Transect-5 Photograph-3 Photograph-5 • . . . - •I b IPA IA— Photograph-2 WOO I V 711 40) -- Feet - Legend 100 50 0 100 200 - Photo Locations Ma Notes 30-Meter Transects SANDAG- 2033 2-tool resolution, 3-band I false Color infrared imagery ' 7j Mitigation Site •' - I J:/G 1St 4/a ----. 1):—----------- ..-- .. ----_- nnrn/armaprrrariect_Ioaiion.mxcI - 03,24,04 Cannon Road Wetland Mitigation Site Transect Locations and Photograph Locations FIGURE I City of Carlsbad Cannon Road Extension Project January 2004 Table 5 Plant Species Cover of the Cannon Road Wetland Mitigation Site October 2003 Scientific Name Common Name Absolute Cover (%) Salix lasiolepis arroyo willow 28.3% Salix gooddingii black willow 14.5% Typha latifofia tall cattail 12.5% Scirpus californicus California bulrush 9.8% Baccharis salicifolia mulefat 9.1% Artemisia douglasiana Douglas mugwort 8.0% Scirpus maritimus prairie bulrush 6.3% Anemopsis californica yerba mansa 5.5% Polypogon monspeliensis rabbitfoot grass 4.8% Rubus ursinus California blackberry 3.5% Salix exigua narrow-leaved willow 2.9% Pluchea odorata saltmarsh fleabane 2.7% Artemisia palmeri San Diego sagewort 2.3% Ambrosia psilostachya western ragweed 1.8% Oenothera elata ssp. hirsutissima great marsh evening- primrose 0.6% Picris echioides bristly ox-tongue 0.6% Juncus acutus ssp. IeopoIdii southwestern spiny rush 0.6% Rosa californica California rose 0.4% Cotula coronopifolia brass buttons 0.3% Baccharis pilularis coyote bush 0.3% Pluchea sericeà arrow weed 0.3% Scirpus sp. bulrush 0.3% Eleocharissp. spikerush 0.1% Apium graveolens celery 0.03% Heliotropium curassavicum salt heliotrope 0.01% Sonchus oleraceus common sow thistle 0.01% Bare ground Bare ground 23.1% Litter Litter 3.5% Percent Total Cover 115.4% Percent Native Cover 109.7% Percent Nonnative Cover 5.8% 319721000-1007/3151-0104R008 Page 18 I HI 1 I p I I I I I 1 7 El City of Carlsbad Cannon Road Extension Project January 2004 I Although the success standard for percent cover outlined in the Conceptual Wetland Mitigation I Plan has been achieved, there are three areas in the wetland mitigation site that have low vegetative cover. These areas, totaling 0.05 acre, are located underneath Macario Bridge and on the revegetated access road. Although vegetation in these areas has developed over the current monitoring period, high levels of salt, soil compaction, and higher topography have reduced seedling germination and limited plant growth rates. To increase vegetative growth rates, these areas have been raked to loosen soil and seeded twice since the initial seeding of the wetland mitigation site. 4.2.2 Tree Heights I Average heights for container plants and cuttings are presented in Table 6. Average height for planted mulefat container plants is 7.8 feet. Average height of narrow-leaved willow container I plants is 12.2 feet. Average height of black willow container plants is 12.5 feet. Average height of arroyo willow container plants is 11.4 feet. Average height for Fremont cottonwood container plants is 9.6 feet. Average height of blue elderberry is 7.3 feet. For year two, there are no I success standards for tree heights; however, all container plants outlined as having success standards (narrow-leaved willow, black willow, arroyo willow, and blue elderberry) have achieved or are close to achieving the height success standard for year five (Table 1). Only I arroyo willow has not met year five success standards, although this species is within 7 inches of this goal. Fremont cottonwood and mulefat container plants do not have tree height success standards associated with them. Table 6 U Average Heights of Container Plants for the Cannon Road Wetland Mitigation Site October 2003 Scientific Name Common Name Average Height Sample Size Baccharis salicifolia mulefat 7.8 25 Salix exigua narrow-leaved willow 12.2 12 Salix gooddingii Goodding's black willow 12.5 21 Salix lasiolepis arroyo willow 11.4 29 Populus fremontii Fremonts cottonwood 9.6 8 Sambucus mexicana blue elderberry 7.3 7 I I. I 319721000-1007/3151-0104R008 Page 19 ii I I City of Carlsbad Cannon Road Extension Project January 2004 5.0 EVALUATION OF RESTORATION SUCCESS AND RECOMMENDATIONS 5.1 Evaluation of Restoration Success Vegetation has established well throughout the wetland mitigation site, meeting and exceeding year five success standards for absolute percent cover. Adequate seed establishment, greater than expected natural recruitment, and perennial water flow through the project area have all contributed to this site's continued success. In addition, the wetland mitigation site has satisfied year five success standards for container plant and cutting survival as well as tree heights (excepting arroyo willow). The wetland mitigation site is expected to continue to meet year five success standards provided that the remedial measures outlined below are followed. 5.2 Recommendations for Year Three The following remedial measures are recommended for the site for year three of the Cannon Road Extension Project wetland mitigation monitoring program: Continue to monitor the wetland mitigation site, especially with respect to water availability/stress, as it is no longer receiving supplemental irrigation. Continue to monitor all areas infested with oyster-shell scale. Respray with Malathion if new infestations are located and/or old infestations remain problematic. Continue to monitor illegal usage of the wetland mitigation site by migrant workers. 12 319721 000-1 007/3151-0104R008 Page 20 City of Carlsbad Cannon Road Extension Project January 2004 6.0 REFERENCES Bossard, C.C., J.M. Randall, and M.C. Hoshovsky, editors. 2000. Invasive Plants of California's Wildlands. University of California Press, Berkeley, California. Cornell University, Plant Diagnostic Clinic. 1999. Retrieved from http://plantclinic.cornell.edu/FactSheets/ on December 10, 2002. Jett, Susan. 2002. Personal Communication. Rancho Santa Ana Botanical Garden Horticulturalist.10 December. Ogden Environmental and Energy Services Co., Inc. 2000. Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California. July. Simpson, Michael G. and Jon P. Rebman. 2001. Checklist of the Vascular Plants of San Diego County. 3rd edition. SDSU Herbarium Press, Sari Diego, California. 4 I -I 319721 000-1007/3151 -0104R008 Page 21 APPENDIX A CORRESPONDENCE 'I 31 becember 2002: 02-201-3151 Project No. 319721000-1007 I I $ Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary. Wetland Impacts of the 'Cannon Road Extension Project (Macario Bridge) Year Two Fifth Monthly Hôrticulturäl Monitoring Report for December 2002 and Remedial Recommendations for Year 2 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits the fifth monthly horticultural monitoring 1etter report for the temporary wetland impacts for the 'Cannon Road. Extension Project. This letter' will also recommend remedial measures for portions of the mitigation site for year 2 to help ensure .that the mitigation, site meets success standards. ' 'The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon. Road (Reaches 1 and 2); United States Army Corps' of Engineers Permit 'Application No. 97-20130-TCD & 97-20131-TOD, City .of Carlsbad, California (1-6-97-F-51'); California Department Fish and Game (CDFG) Section. 1.601 Streamb.ed Alteration Agreement No. 5-044- 97 & 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development 'Permit No. 6-97-1- 1. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native. Landscape, Inc. (Native Landscape) for year's one and two of the Cannon Road Extension Project. This is the fifth monthly horticultural report 'for year two. . On 10 December '2002'AMEC performed the fifth monthly horticultural site visit for year two of the Cannon Road Macario Bridge wetland area horticultural monitoring program. During the site visit, AMEC personnel Jessie Walker and Julie SimonsenMarchant assessed the condition of the site. This letter covers irrigation system maintenance, weed control, the 'health of wetland and remedial measures recommended for, year two. The majority of the mitigation site is presently performing well. Supplemental irrigation is being applied to all portions of the wetland mitigation site. Twb sprinklers under the bridge had not been raised as of . the site' visit. AMEC and Native Landscape 'had discussed raising the sprinklers during the .November site Visit to increase cover. AMEC consulted with 'Native :Landscape after the site visit and they said that they would raise the sprinklers: that week. '319721 000-1007/3151-1202R160 I I Ms. Sherri Howard City of Carlsbad 31 Ciecember 2002 All of the nonnative invasive species previously noted in the mitigation site have been removed. One newly discovered pampas grass (Cortaderia sp.) was located on the. rëvegetated access. road. Several nonnative species still remain in the site such as bristly ox-tongue (Picris' echioides), but are under control: AMEC recommended to. Native Landscape to remove the: pampas grass. AMEC and Native Landscape will continue to monitor the mitigation site for. invasive species. . . Dead container, plants and areas with little to no vegetative cover . .were identified in the. mitigation site during the month of Octobei. Remedial measures are recommended. for these.. dead container plants and cuttings and areas with little vegetation and to ensure that the site. meets success standards. These issues and the remedial measures Will also be discussed in the annual report. AMEC recommends hand seeding approximately 0.05 acre of the wetland .mitigation site.- The ' seeding would occur on the revegetated access road and 'a speôific area. underneath Macario Bridge in' the winter of 2003 to account for low cover and low recruitment and establishment. Several species from the original.seed mix-will be used including 0.4 pounds of mugwort (Artemisia douglasiana), 0.5 pounds of mule fat (Baccharis salicifolia), 0.2 pounds of western ragweed (Ambrosia psiostachya) and 0.2 pounds of. yerba mansa (Anemopsis californica): Before the seeding occurred, the areas to be seeded would be ripped' by hand carefully so as not to destroy any established perennial species in the' vicinity. AMEC recommends planting 10 arroyo willow (Salix lasiolepis), 10 black willow (Salix gooddingii), and 15 mulefat (Baccharis salicifolia) cuttings on portions' of the revegetated access road and underneath the bridge to compensate for high mortality of container plants. These cuttings should be obtained from the existing willow trees adjacent to' the wetland mitigation site and planted in winter 2003. Cuttings will be collected between December and March when the willows are dormant. Although only a small percentage of the site needs remedial measures; implementation of these measures will demonstrate to regulatory agencies that measures were taken :to aid in site success. AMEC will continue monthly horticultural monitoring . visits :and submit. monthly• progress reports for year two in accordance, with the project's permits and agreements.' Please call me at (858) 458-9044, extension 264, or email .me 'at jessica.walker@ame.c.com, if you'. have any questions. ' Sincerely, Inc. 'I Jessie Walker Botanist .' . . JW/css cc: ' Debbie Fromme; Native Landscape, Inc. I File Contracts 319721000-1,00713151-1202R160 Page 2 I ' . I 5 February, 2003 03-011-3151 Project No. 319721000-1007 1• "Ms.. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Year Two Sixth Monthly Horticultural Monitoring Report for January 2003 Dear Ms. Howard: AMEC Earth &' Environmental (AMEC) submits the sixth monthly horticultural monitoring letter report for the temporary wetland impacts for the Cannon Road Extension Project. This letter will also discuss the implementation of remedial measures for portions of the mitigation site. The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army 'Corps of Engineers Permit Application No. '97-20130-TCD & 97-20131-TCD, City Of Carlsbad, california (1-6-97-F-51); California. Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044- '97 & 5-045-97; CDIG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. "According. to the Conceptual Wetland Mitigation Plan for. Temporary Wetland Impacts' of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape) for year's one and two of •the Cannon Road Extension Project. This is the sixth monthly horticultural report for year two. On January 8, 2003 AMEC performed the sixth monthly horticultural site visit for-year two of the "Cannon Road Macario Bridge wetland area horticultural monitoring program During the Site visit, AMEC personnel Jessie Walker and Debbie Fromme of Native' Landscape* assessed the condition of the site. The 'irrigation. system. maintenance, Weed control, and the' health of wetland vegetation are discussed below. Supplemental irrigation is still being applied to all portions of the wetland mitigation site.. Portions of the site are dry due to the lack 'of rainfall. AMEC will continue to monitor the site. and recommend that the irrigation be adjusted if the plants appear stressed. 'I AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel (858) 458-9044 Fax (858) 458-0943 www.arnec.com 319721000-10O7/31 51-0203R007 $ 1. 'I Ms. Sherri Howard City of Carlsbad . 5 February, 2003 ame&-- All of the nônnative invasive species that were previously located in the mitigation site have been removed. However, species such as pampas grass (Cortaderia sp.) and bristly. ox-tongue (Picris echioides) will most likely continue to be problem species at this site since these species are present adjacent to the site AMEC and Native Landscape will continue to monitor. the I. 'mitigation. site for all invasive spedes. . S.. " . . .' . .. •' ' . . Remedial measures outlined in the fifth horticultural monitoring letter ' report, which included seeding and installing cuttings, were installed on the morning of January 25, 2003. Earlier in the month, AMEC provided Native Landscape an email dated January 6, 2003 (Letter Attached) and instructions by mail, which discussed the seed poundage, number of cuttings and industry standard guidelines for installation of cuttings. AMEC and Native Landscape personnel met at the site on January 25, 2003 to discuss the installation of the remedial measures,, which were implemented shortly after the meeting. On February 3, 2003, AMEC visited the mitigation, site to inspect the installation of the remedial measures. The remedial- measures appear to have been. installed to industry 'standards. AMEC will continue to monitor the success of the remedial' measures in the areas where they were implemented. AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports for year two in accordance-with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or email me atjessica.walker@amec.com, if you. have any questions. Sincerely, .AMEC Earth & Environmental,:. Inc. '. Jessie Walker Botanist JW/oss Enclosure cc: Debbie Fromme; Native Landscape, Inc. File .Contracts 319721000-1007/3151-0203R007 Page 2 I . . I . . January 6, 2003 Ms. Debbie Fromme Native Landscape, Inc. Subject: Cannon.Road RemedialMeasures Year Two Remedial Measures Introduction' Dead container plants and cuttings and areas with little to no vegetative cover were identified in I. the mitigation site during the month of October. Remedial measures are recommended for these dead container plants and cuttings and areas with little vegetation to ensure that the site meets success standards. Overall description The Cannon Road Wetland Mitigation Site is comprised of approximately 2.56 acres of southern I willow scrub and freshwater marsh revegetated habitat. Limited remedial measures shall be • employed before the end of January of 2003. The site is irrigated and is comprised of a revegetated access road, an area underneath the Macario Bridge and a revegétated slope on the a, northeastern side of the wetland mitigation site. The remedial measures outlined below include the collecting and installing, of willow and mulefat cuttings and hand seeding approximately 0.05 acre of wetland habitat.. AMEC shall accompany Native Landscape, Inc. to show them the collection, planting, and seeding 0.05-acre areas,.which need remedial measures. Task 1. Collect and Install Cuttings , Arroyo- willow (Salix Iasiofepis), black willow (Salix goOddingii) and mulefat (Baácharis salicifolia) cuttings shall be collected from areas adjacent to the wetland mitigatipn site and installd'd. Cuttings shall be collected in January during the will and mulefat dormancy period and installed to industry standards withiA 24 hours after collection. Approximately 10 arroyo willow, 10 black willow, and 15 mulefat cuttings shall be collected and installed in the designated areas. I. Task 2. Seeding Hand rake or rip soil and hand seed wetland species' (Table 1) in designated areas and" include wheat bran in-the seed mix. All purchased seed should come from a local source, I when possible. 'Prior to seeding, the restoration ecologist will mark areas to be seeded and verify that seed mixes are accurate. All seed labels shall be kept and given to the restoration ecologist after seeding is completed. The seed poundage has been doubled since hydroseeding was employed originally. Table 1 CANNON ROAD WETLAND MITIGATION SITE REVISED SEED MIX FOR FALL 2003 REMEDIAL MEASURES Scientific Name Common, Name Original Pounds per Acre from, Hydroseeding 'Remedial Pounds per Acre for 0.05 , ' Acre ' Minimus Percent Pure Live Seed Ambrosia psiosfacya western ragweed 2. 0.2. Not available Anernopsis califomica yerba mansa ' 2 ' ' 02 27 Artemisia douglasiàna Douglas mugwort ' 4 . 0.4 5 L!1 Original Pounds per Remedial Pounds Minimus Acre from per Acre for 0.05 Percent Pure Scientific Name Common Name Hydroseeding Acre Live Seed• Baccharis salk ifolia mulefat 0.5 If you have any questions please contact me at (858) 458-9044; extension 264. I will be in touch with.you to confirm receipt of this request, schedule a walkthrough for this week if possible, and confirm implementation of the remedial measures before the end of February. Sincerely, 5 0 Jessie Walker. S I ameO .I 10 March, 2003 03-029-3151 Project No. 319721000-1007 I.. 'S '•' "S •' Ms. Sherri Howard Project 'Manager City of Carlsbad Engineering Department ' I 1,635 Faraday Avenue Carlsbad, California 92008 'Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (.Macario Bridge): Year Two, Seventh Monthly Horticultural Monitoring: Report for February 2003 Dear Ms., Howard: AMEC Earth & Environmental (AMEC) submits the seventh monthly horticultural monitoring letter report for the temporary wetland impacts for the Cannon Road Extension Project. The project is authoried under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches .1' and 2); United States Army Corps of Engineers Perthit Application' No. '97-20130-TCD'& 97-20131-TCD, City. 'of' Carlsbad, California (16-97.F-51); California. Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044- 97 & 57045-97; CDFG California Incidental'Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape) for year's one and two of the Cannon Road Extension Project. This is the seventh monthly' horticultural report for year two. 'On February 17, 2003 AMEC perfOrmed the seventh monthly horticultural site visit for year two of the Cannon Road Macario 'Bridge wetland area horticultural monitoring program During the site visit, AMEC personnel Jessie Walker and JUlie Simonsen-Marchant assessed the condition of -the site. The irrigation system maintenance, weed control, rerndial measures, plant health, erosion, pest issues, and onsite trash are discussed below. Supplemental irrigation is still being applied to all portions of the, wetland mitigation site. The plants are not stressed from drought conditions any 'longer as they had been during the previous year due to the February rains. AMEC will continue to monitor the site and recommend that the irrigation be adjusted if necessary. AMEC Earth & Environmental, inc., 5510 Morehouse, Drive Sa,n Diego, CA 92121 Tel (858),458-9044 Fax (858) 458-0943 ' www.amec.com ' 319721O-1007/3151-03flO24 Ms. Sherri Howard . . . City of Carlsbad 10 March, 2003 I . Nonnative, invasive species were noted during the walk-through. Species such as bristly ox tongue (Picris echiciides) and myoporum (Myoporum lactum) are still occupying portions of the site. AMEC recommended to the landscape maintenance contractor that the bristly ox-tongue I be controlled and that the myoporum be eradicated A new population of the highly invasive poison hemlock (Conium maáulatum) was located: along the revegetàted access, road, AMEC.. recommends that this species be eradicated, since ' it is known to have an adverse and detrimental effect on native plant communities. AMEC and Native Landscape will continue to monitor the mitigation site for all invasive species. The remedial measures that were installed on January 25, 2003 were assessed during the mitigation site visit. The arroyo willow (Salix lasiolepis) cuttings were budding and the mulefat' (Baccharis saliciifolia) cuttings were not. No seedlings were detected from the seed that was applied to the mitigation site; however, it is still too early to detect seedlings. The portion of the revegetated access road where remedial measures were installed is higher in grade than other portions of the road and the riparian area on either side of the revegetated, access road. As a result, this portion of the road is drier and the soil is more compacted. It may be necessary to implement additional remedial measures in this area in the future due to the conditions listed above. AMEC will continue to monitor the success .of the remedial measures in the areas where' they were implemented and make any necessary recommendations. During the rain event in February, sediment was deposited' on the southern portion of the ,revegetated access road from the adjacent San Diego Gas and Electric .(SDG&E) access roads. The City, contacted SDG&E to inform them of this issue SDG&E 'agreed to re,grade the road to' help prevent sediment from entering into, and settling over the mitigation site. They' also -agreed to place sand bags in the vicinity of the mitigation site located near the SDG&E access roads to help offset future sedimentation. AMEC located an area in the beginning of the revegetated access road with a scale infestation on arroyo willow saplings and mature arroyo willow trees adjacent to the mitigation site. AMEC took the specimens to the County Department of Agriculture (CDA) for identification. 'The scales were identified by David Kellum of the CDA as oystershell scales (Lepidosaphes u1m1). This species is common on willow species along 'riparian corridors in California; however, they. are not a native scale species. This species is not usually a pest in California but can kill twigs and small trees. In some cases it can also severely stunt or disfigure mature willow trees. Overwintering eggs were also located which means there will continue to be an infestation of "this species in the mitigation site. Parasitic wasps, naturally occurring beneficial biological control agents," were also located in conjunction with the scales. These wasps feed. On these' scales and usually keep a scale population under control. AMEC is researching methods' to, control the infestation and will continue to monitor the infestation at the mitigation site as well. Management recommendations will be made if the scale population grows or spreads to other' portions of the mitigation site. Trash has accumulated in the southern portion of the revegetated access road., Most of the trash. is remaining from the homeless encampment. AMEC recommends that the Landscape Maintenance contractor remove this trash from the mitigation site. 319721000-1007/3151-0303R024 Page 2 I I I I I n I Ms. Sherri Howard City of Carlsbad 10 March, 2003 AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports. for year. two in accordance with the project's permits and agreements.' Please call me at (858) 458-9044, extension 264, or email me at jessica.walker@amec.com, if you have any questions. Sincerely, AMEC Earth & Environmental, Inc. Jessie Walker Botanist JW/css. '. Enclosure. cc: Debbie Fromme; Native Landscape, Inc. . . . ,. File. Contracts . 319721000-1007/3151-0303R024 Page I i 27 March2003 03-036-3151 Project No. 319721000-1007 I I Ms. Sherri Howard. Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project . (Macario Bridge): Year Two, Eighth Monthly Horticultural Monitoring Report for March 2003 Dear Ms. Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this eighth monthly horticultural monitoring letter report in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of:the Cannon Road Exterision Project Carlsbad, California, July 2000. The project is. authorized 'undeir United States Fish and Wildlife Service*, Biological Opihion on CannonRoad (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130- TCD and No.'97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California DepartmentS Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5044-97 and No. .5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural. monitoring reports must be sent to the Cityof Carlsbad (City) and the landscape maintenance.. contractor, Native Landscape, Inc. (Native Landscape), for year's one and two of the Cannon Road Extension Project. This is the eighth monthly horticultural report for year two. . On 11 March 2003, AMEC performed the eighth .rnbithly horticultural site visit for year two of : the Cannon Road Macàrio Bridge wetland area horticultural monitoring program. During the site Visit, Botanist Jessie Walker from AMEC and Debbie Fromme of Native Landscape assessed the condition of the site. Issues discussed included weed control, remedial measures, pests,. and on-site trash.... . . . AMEC recommended that the bristly ox-tongue (Picris' echioides), myoporum (Myoporum !aetum), and poison hemlock (Coniurn maculatum) located during the last mitigation site visit be eradicated. Native Landscape eradicated these, species during the week of 17 through 21 March. AMEC and Native Landscape will continue to monitor the mitigation site for all invasive species. . . . . . . 319721000-1007/3151-0303R030 Ms. Sherri Howard I City of Carlsbad 27 March 2003 amelL~~- The remedial measures that were installed on 25 January 2003 were assessed during the mitigation site visit. The arroyo willow (Salix lasiolepis) cuttings and mulefat (Baccharis salicifolia) cuttings were budding During the February site visit the mulefat cuttings were not budding yet AMEC will continue to monitor the success of the remedial measures in the areas where they were implemented and make any necessary recommendations. AMEC located an area on the revegetated access road with an oystershell scale (Lepidosapes turn,) infestation on arroyo willow saplings and mature arroyo willow trees adjacent to the mitigation site. AMEC showed this infestation to the City. and Native Landscape. It was determined during a 13 March 2002 meeting that horticultural oil (Omni-Oil) be sprayed on the scale infestation to keep the infestation from taking over the entire mitigation site and compromising the success of the mitigation. In the meeting, the City, AMEC, and Kim McKee of CDFG discussed how the scale infestation should be handled considering that, during the breeding and nesting season, the adjacent habitat is occupied by least Bell's vireo (Vireo be!Iii push/us) and that the horticUltural oil application would occur during the bird nesting season. It was determined that the horticultural oil be applied before the leastBell's vireo arrived to the mitigation site and that a least Bell's vireo . survey be conducted before the horticultural oil application. It would also be necessary that a biologist familiar with least Bell's vireo be present during the horticultural oil application. A 26 March 2003 letter outlines .the history of the oystershell scale and the treatment of the oystershell scale in the mitigation site. The City is sending a. bilingual officerto the .mitigation site to locate any homeless persons or encampments. During this visit, the trash that has accumulated from at least one homeless encampment will be removed. If any homeless persons are located on the site, they will be educated regarding the use of, and living within, the mitigation site. AMEC will continue its monthly horticultural monitoring visits and submit monthly progress reports for year two in accordance with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or e-mail me at jessica.walker@arnec.com, if you have any questions. .. Sincerely, AMEC Earth & Environmental, Inc. Jessie Walker Botanist JW/sm Enclosure CC'. Debbie Fromme; Native Landscape, Inc. File Contracts 319721000-100713151-0303R030 Page 2 1 . . . . . . I... •.. . .. . ame&,. 28 March 2003 . 03-037-3151 . Project No. 319721000-1007 . S I Ms Sherri Howard .Projéct.'Managér . . .. . •. ..• ... . ..• .• . . City of Carlsbad I . Engineering Department . 1635 Faraday Avenue Carlsbad, California 92008 I Subject: Cannon Road Extension- Project (Macario Bridge): History of Oystershell. Scale Infestation 1 Dear Ms. Howard: I .As requested by the City of Carlsbad (City), AMEC Earth & Environmental, Inc. (AMEC) prepared a memo regarding the oystershell scale (Lepidosapes u/mi) infestation at the Cannon Road Extension Project (mitigation site). The mitigation site is located in Macario Canyon in Carlsbad, California, and is mitigation for wetland impacts associated with the implementhtion of the Cannon Road Extension Project Reach 1. This letter briefly describes oystershell scale and summarizes the meetings about the oystershell scale infestation., I.. ' David Kellum, an entomologist from San Diego County Department of Agriculture, identified the oystershell scale. 'Oystershell scale is common on willow species along riparian corridors in California; however, it is not a native scale species. This species is not usually a pest in California, .but it can kill twigs and small trees. In some cases, it can also severely stunt or disfigure mature willow trees. Overwintering oystershell scale eggs were located on the trees in the mitigation site, which indicates that there will continue to be an infestation ofthis species in the mitigation site. On a' portion of the revegetated access road and in the mitigation site, this .species has established. . and has infested the smaller container willow trees, the willow cuttings, and the willow saplings. Adjacent to the mitigation site, this species has also'.established and has infested the large, mature willow trees (Figure 1). As a result, these trees are unhealthy and stunted with little annual growth; many branches have broken off. If left unattended, this infestation could kill trees in the mitigation site, thereby hindering the success of the mitigation On .14 March 2003, représentative.s from the California Department of Fish and Game.(CDFG), the City, and AMEC met at the mitigation site to discuss the oystershell scale infestation. It was determined during this meeting that horticultural oil be applied to the scale infestation to prevent the scale eggs from . hatching this year. It was also determined that the dead and woody material infested with oystershell scale be removed within the adjacent mature riparian area where it comes into contact with the mitigation site. On 18 March 2003, an additiOnal meeting, was held with representatives from the City, AMEC, Native Landscape, Inc. (Native Landscape), and Jack Olmstead of Plant-Tek, Inc.. Following a AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 . Tei (858) 458-9044 Fax (858) 4.58-0943 www.ameccom 319721006-100713151-0303R032 I I I I Ms. Sherri Howard ity of Carlsbad 28 March 2003 literature review of oystérsheH scale infestations ,and after consulting with Jack Olmstead on '18 March 2003, it was determined that spraying Omni-Oil', a' horticultural oil, combined with an, insecticide to' control the scale infestation would be the best means for managing the infestation and preventing it from spreading to other portions of the mitigation site. This combination would not affect riparian. vegetation and would only be, applied in, areas with running water if the label confirmed that it was safe to use in areas with running water..This combination is usually the most effective mode for controlling oystershell'scale."Spraying. a combinatibnof horticultural. oil.' and an insecticide was not discussed with CDFG as this means for control was unknown at the time of the field meeting. It was also determined after the consultation with Jack Olmstead that the removal of dead and dying woody 'material infested with oystershell scale not occur since - the oystershell scale was already dead if located on dead woody material. On 20 March 2003, Plant-Tek, Inc. applied the Omni-Oil on the scale infestation. 'Biologist David King (TE-785148) conducted a pre-application survey for least Bell's vireo (Vireo be/Ill pusil!us) prior to the Omni-Oil application. Least Bell's vireo were observed approximately. 500 feet away from the mitigation site in the mature riparian woodland southeast of the mitigation site during the 2-hour pre-application survey on 20 March 2003., Since least Bell's vireo were located, only the Omni-Oil was applied. No insecticide was applied to the scale in the mitigation site. Fifty ounces of Omni-Oil 'at 2 percent was combined with 20 gallons of water and applied to several portions of the revegetated access road. The Omni-Oil was not applied near water. The' least Bell's vireo did not come into the mitigation site, nor were they observed using areas close to the mitigation site prior to the Omni-Oil application. The ongoing maintenance: and control of. oystershell. scale at the mitigation site will help the mitigation site reach' success standards and keep 'the riparian vegetation healthy, thereby benefiting the least Bell's 'vireo 'and other migratory bird species 'that use Macario Canyon.' In the future, it may be necessary to apply more Omni-Oil in combination with an insecticide, 'to - maximize success of the mitigation site.- If. you have any questions, please call me at (858) 458-9044, extension 264, or e-mail me at jessica.walkeramec.com. Sincerely, AMEC Earth & Environmental, Inc. Jessie Walker Botanist JW/sm 'cc: Debbie Fromme; Native Landscape, Inc. 'File Contracts 319721000-1007I3 15 1-0303R032 Page 2 '1 I I I I I I I I 2 June 2003 I Project No. 319721 000-1 007 Ms. ,Sherri Howard Project Manager City of Carlsbad S Engineering Department .' 1635 .Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland. Impacts for the Cannon Road Extension Project. (Macario Bridge): Year Two, Ninth Monthly Horticultural Monitoring Report for April 2003 . . Dear Ms. Howard: AMEC. Earth & Environmental, Inc.'s (AMEC's) . ninth monthly, horticultural monitoring letter report for the temporary wetland impacts athe Macario Bridge. Wetland area for year two of the' Cannon Road Extension Project.. S The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 9720130TCD and 97-2'0131-TCD,' City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration. Agreement No. 57044-97, & 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal 'Development Permit No.. 6-97-11. According to the Conceptual Wetland' Mitigation Plan for Temporary 'Wetland Impacts of 'the Cannon Road Extension Project, Carlsbad, California (July 2000) monthly horticultural monitoring reports must :be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape) for year's one and two of the Cannon Road Extension Project. This 'is the ninth monthly horticultural report for year two.. ' On 30 April 2003, 'AMEC performed the ninth monthly horticultural site visit for year two of the 'Cannon Road Macario Bridge wetland area horticultural monitoring program. During the -site visit, AMEC biologists Jessie Walker and Mike Howard assessed the condition' of the .èite. 'Issues addressed include weed control, remedial measures, pest issues, erosion, and .the homeless encampment. 'One highly invasive 'species, perennial pepperweed. (Lepidium latifolium), was located during the site visit and removed It was observed growing in the same location along the access road as was observed last year. AMEC and Native Landscape will continue to monitor the mitigation site for all invasive species and take necessary steps to control any highly invasive plant species. The remedial measures that were installed on '25 January 2003 were assessed during the mitigation site. visit , The majority of the arroyo willow (Salix IasioIepis) cuttings, and 'miilefat (Baccharis salicifolia) cuttings had established; however, several of. the cuttings did not AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 9.121 Tel '(858) 458-9044 , Fax (858) 458-0943 www.amec.com 319721 000-100713i51-06031083.doc Page 1 Ms. Sherri Howard City of Carlsbad 2 June 2003 establish and were dead. It was anticipated that there would be mortality of these cuttings since cutting survival success is average. No seedlings from the remedial seed mix were observed in. areas where seed was placed. However, many other seedlings from the established native plants within the mitigation site were observed. In addition, many of the native perennial and annual species in the mitigation site were flowering or setting seed. AMEC will-continue to monitor success of the remedial measures in the areas where they were implemented and make any necessary recommendations. The area on the revegetated access road with the scale infestation on arroyo willow saplings and.,mature arroyo willow trees adjacent to the mitigation site appears to be responding to the horticultural oil treatment. No scales in the "crawler" stage were observed, during the, site visit. AMEC will continue to look for further scale spread and infestation throughout the mitigation site. ' During the rain event in February, sediment was deposited on the southern portion of the'. I .revegetated access road from the adjacent San Diego Gas and Electric (SDG&E) 'access : roads. The City contacted SDG&E to inform them' of this issue. .SDG&E agreed toregrade the road to help prevent sediment from entering into, and settling over the mitigation -site. It was I .evident during the site visit, that SDG&E. 'did 'regrade their' access . road to prevent further sedimentation into the mitigation site. During the site visit, it appeared that the homeless persons had not used the mitigation site recently. AMEC will continue to monitor the area for further signs of use. AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports for year two in, accordance with :the. project's permits and agreements. Please call me at. (858) 458-9044, extension 264, or email me at jessica.walker@amec.com, if you have any questions. Sincerely, ,AMEC Earth & Environmental, Inc. essie Walker Botanist JW/rl Enclosure cc: Debbie Fromme; Native Landscape, 'Inc.' File Contracts 319721000.1007/3151-0603L083.doc Page 2 I I I I I I I I I I I I I I ameê 6 June 2003 . S Project No. 3.19721000-1007 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 . Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): Year Two, Tenth Monthly Horticultural Monitoring Report for May 2.003 Dear Ms. Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this tenth monthly horticultural monitoring letter report for the temporary wetland impacts for the Cannon Road Extension Project. The project is authorized under the United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD and 97-20131-TCD, City of Carlsbad,' . arlsbad, California (1-6-97-.F-51);. California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California Incidental Take Permit No. 2081-1998-0-5; and California Coastal Commission Coastal Development Permit No. '&_9741. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape) for years one and two of the Cannon Road Extension Project. This is the tenth monthly horticultural report for year two.. On 30 May 2003, AMEC performed the tenth monthly horticultural site visit for year two of the Cannon Road Macario Bridge wetland area, horticultural monitoring program. During the site visit., AMEC biologist Jessie Walker and 'Sherri Howard of the City of Carlsbad assessed the condition of the site. Issues addressed include weed control, remedial measures, pest issues, and the homeless encampment; 0 0 The highly invasive species, perennial pepperweed (Lepidium latifolium),. was located again during the site visit. Approximately 10 individuals were located and removed. It was observed growing in the same location along the access road as was observed last month. Since this species is highly invasive and spreads by underground rhizomes, . AMEC met with Native Landscape, Inc., the. landscape maintenance contractor, at the site on 4 June to discuss methods of permanent eradication of this species. S The remedial measures that were installed on 25 January 2003 were assessed during the mitigation site visit. The majority of the arroyo willow (Salix lasiolepis) cuttings and mulefat (Baccharis salicifolia) cuttings had established; however, several of the cuttings 'had not established and were dead. AMEC. will continue to monitor success of the remedial measures in 31 9721000-1 007/3151-06031086 0 I I [1 I I I i I I I I I I I I I I I I Ms. Sherri Howard City of Carlsbad. 6 June 2003 "Wii "'Saw, 4W. the areas where they were implemented and make any necessary recommendations, which Will be implemented in fall or winter of 2003. The area on the revegetated. access road with the scale infestation on arroyo willow saplings and mature arroyo willow trees. adjacent to the mitigation site still appears to be responding to the horticultural oil treatment. No scales in the "crawler" stage, were observed during the. site visit on new willow (Sallx sp.) and Fremont, cottonwood' (Populus fremontii) growth and the scales that were sprayed. appeared dead. AMEC will continue to look for further scale spread and infestation throughout the mitigation site. Although it has appeared in previous months that the homeless encampment was not being used, during . this site visit two young Hispanic men were observed washing in, the homeless encampment area. It was noted that the men .had hung their clothes on the mitigation site container plants, had discarded trash and debris' in the vicinity, and had defecated in several locations in the mitigation site. The vegetation in the-vicinity of'this area is dying or dead. Dave Felt, the City .of Carlsbad Community Service Officer, was summoned to speak with the men. During the conversation, the men were asked, in broken Spanish, to leave the area and to take all of their trash with them. The men were informed that they were not allowed to use the mitigation site for washing or living. AMEC 'biologist Jessie Walker and Sherri Howard were present during the Conversation. Sherri Howard revisited the mitigation site on 3 June. At that time she noted that the men were continuing to 'use the mitigation site; however, they had moved approximately 10 feet away from the first location. There were new washing areas established, and several new holes had been dUg into the ground. The City 'of Carlsbad Parks and Recreation Department removed the trash, debris, clothes, and sanitary items from the mitigation site on 4 June 2003, which was confirmed by AMEC on a 5 June 2003 site visit. AMEC also 'noted that' individuals had walked through the mitigation site and had broken off branches of many of the container plants along ,the, revegetated access road, killing several of these trees. In addition, four of, the established cuttings that were 'installed as remedial measures on 25 January had been pulled out of the ground or were broken.. AMEC, in coordination with Sherri Howard, suggested that signs written in Spanish, prohibiting trespassing in the mitigation site be prepared and placed :along the outer periphery of the mitigation site. AMEC, in coordination with .the City of Carlsbad, will continue to monitor the mitigation"site and document further use and abuse of the mitigation site. and will continue to take action to prevent further detrimental use of the mitigation site. 319721000-1007/3151-0603L086 Page 2 I I I Ms- Sherri Howard City of Carlsbad 6 June 2003 ameeG AMEC will continue monthly horticultUral monitoring visits and submit monthly progress reports for year two in accordance with the project's permits andlagreements. Please call me at (858) 45.8-9044, extension 264, or email .me at jessica.walker@amec.com, if you have any questions. Sincerely, . . AMEC Earth & Environmental, Inc. . Jessie Walker Botanist . . . JWIvm . S Enclosure S S S cc; Debbie Fromme; Native Landscape, Inc. File Contracts S 319721000-1007/3151-0603L086 Rage 3 16 June 2003 03-056-3151 I Project No. 319721000-1001 Ms. Sherri Howard Project Manager I .City of Carlsbad . . . . Engineering Department . 1635 Faraday Avenue I .. Carlsbad, California 92008 . Subject: Cannon Road West -.City Project No. 3184. Final Biological Construction Monitoring Reort Dear Ms. Howard: . . . . . AMEC Earth & Environmental, Inc. (AMEC) submits this final biological construction. monitoring letter report for Reach 2 of the Cannon Road West City Project No. 3184',for the City of Carlsbad, California, for your records. . . The project has permits with the United States Fish and Wildlife Service (USFWS), Biological Opinion (BO) on Cannon Road (Reaches I and 2); U.S. Army Corps of Engineers (ACOE) Permit Application No. 97-201 30-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97; CDFG California Incidental: Take Permit - Permit No. 2081-1998-05-5; and California Coastal Commission (CCC) Coastal Development Permit No. 6-97-11. According to the . project's permit condition, monthly biological . monitoring reports must be sent to the USFWS, ACOE, CDFG, and CCC. This report documents the completion of biological construction. monitoring for Cannon• Road Reach 2. This report covers a monitoring, period of October 2002 through March ...2003.- During this period, the level of heavy construction activities on the site was significantly reduced. At the. beginning of 2003, roadway construction was essentially complete, and on 31 March 2003 AMEC conducted the final construction monitoring visit f this project. The roadway was dedicated and opened for operation on 30 April 2003. Between October 2002 and December 2002, construction activity on Reach 2 included the completion of underground drainage installation, fine grading activity on the roadway, and • installation of the asphalt and concrete roadways and sidewalks. Landscaping and revegetation activities were also conducted. After the beginning of the year, construction activities were substantially reduced. A final visit was conducted in .• March 2003 to verify completion of construction and document the site conditions. No violations were observed during this reporting period. The observations made during :. this reporting period are included in the attached construction monitoring forms. Digital • . • • 319721 000/3151-0603R068 I . • Ms. Sherri Howard City of Carlsbad 16 June 2003 amec photographs were taken of the site during this monitoring periodand are available upon request. Please call me at (858) 458-9044, extension 252, or e-mail me at mike.howard@amec.com if you have any questions. Sincerely, S AMEC Earth.& Environmental, Inc. fb%-Mike Howard S S Senior Biologist S MH/sm S Attachments: Construction monitoring forms for this'monitoring period cc: • Bill Ponder, California Coastal Commission Tamara Spear, California. Department of Fish and Game Dave Lawhead, California Department of Fish and Game Terry Dean, U.S. Army-Corps of Engineers John Martin, U.S. Fish and Wildlife Service S • • Contracts S • •• S • • File 319721000/3151 -06O3R068 S Page.2 I ame 19 I . Memo i To Sherri Howard, Project Manager Project no 319721000 City of Carlsbad From Mike Howard cc: Date June 25,'2003 Subject Cannon Road Monitoring and Mitigation Project Status Report through June 2003 This status report has been prepared to dopument project progress through June 2003 and update the City of Carlsbad on remaining task responsibilities, schedute; project budget, and issues and resolutions. . I Project Status Reach 2 Biological Construction. Monitoring. With the dedication and opening of Cannon Road I Reach 2 on April 30, 2003, biological construction monitoring for this project was completed. A Final Biological Construction Monitoring Report was submitted to the City and the regulatory agencies on June 16, 2003. All construction monitoring task responsibilities are complete. I Macario Bridge Wetland Mitigation Monitoring. AMEC is currently in its 2nd year of mitigation monitoring on this 5-year wetland restoration monitoring project. AMEC is regularly 'conducting both horticultural and botanical monitoring at the mitigation site. AMEC is 'responsible for I preparing monthly horticultural monitoring reports and yearly botanical monitoring reports. Several out-of-scope items were conducted by AMEC at the direction 'of the\City under this task and these items are outlined below. This task is ongoing. Budget Status The biological construction monitoring task is now complete. The budget remaining on this task is approximately $4;700. ,The wetland mitigation monitoring task is in Year 2 of 5. The budget remaining on this task is I approximately $19,000. Several out-of-scope items have been conducted under this task and are outlined below: I . • 3 meetings, to discuss the. scale issue at the mitigation site. One meeting was with CDFG and one meeting was with an entomologist (Jack Olmstead). Another site visit occurred after the scale infestation was sprayed to check the site. (Jessie Walker) Research (County Department of Ag. 'Visit with David Kellum and literature and internet research) and project management occurred in response to the scale issue. (Jessie I Walker) I . AMEC Earth & Environmental Inc. 5510 Morehouse Drive San Diego. California 92121 Tel 858 458-9044 I Fax 858 458-0943 www.amec.com ' '. N:\Cannon Road\Management\cannon Road Status Report 6-24-03.doc I, 2 I • Letter report was prepared in response to the scale issue. (Jessie Walker) ' S An AMEC environmental scientist spent time researching the scale issue. (Bill Le s t e r ) Two least bell's vireo surveys were performed prior to the application of the horticult u r a l oil used to control the scale. (David King) AMEC proposes to transfer the budget remaining under the construction monitoring t a s k ( n o w I complete) to the wetland mitigation monitoring task. This will cover the out-of-sco p e t a s k s • outlined above and would ensure that the project remains on budget through t h i s 5 - y e a r monitoring program. Please advise on this issue. Issues nd Resolutions • There are no current issues related to this project at this time. I t. •CJI'.JCW-. I €&M q.z4'WU3 • I I I .• I 1 I •' • I.. •: •• N:\Cannon o....... 19171 ame'. I 16 July 2003 . I :Project No. 319721 000-1 007 S Ms. Sherri Howard Project Manager City of Carlsbad Enginéérihg Department 1635 Faraday Avenue I Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project I : : (Macario Bridge): Year Two, Eleventh Monthly Horticultural Mohitoring Report for May 2003 5... . . Dear Ms. Howard: . AMEC Earth & Environmental, Inc. (AMEC), submits this eleventh monthly horticultural monitoring letter report for year two in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000. The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-977F-51);. California Department Fish and Game (CDFG) Section .160.1 Streambed Alteration Agreement No. 5-04497 & 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, monthly horticultural monitoring reports must be sent to the City of Carlsbad (City) and the landscape maintenance contractor, Native Landscape, Inc.' (Native Landscape), for years one and two of the Cannon Road Extension Project. This is the eleventh monthly horticultural report for year two. On 5 June 2003, AMEC performed the eleventh monthly horticultural site visit for year. two of the Cannon Road MäcariO Bridge wetland area horticultural monitoring program. During the site, visit,, biologist Jessie Walker from AMEC and Debbie Fromme •of Native Landscape assessed the condition of the site. Issues addressed included weed control, remedial measures, and the homeless encampment. . . . AMEC and Native Landscape discussed methods for permanently eradicating the highly invasive perennial pepperweed (Lepidium latifoliUm) that occurs at the,mitigation site. Intensive control methods, including hand-pulling and herbicide treatment, will occur during the following months until this 'species is eradicated from the site AMEC and Native Landscape will continue to monitor success of control methods and make any necessary recommendations. The remedial measures installed on 25 January 2003 were assessed during the mitigation site visit. The majority of the arroyo willow (Salix lasiolepis). cuttings and mulefat (Baccharis salicifolia) cuttings had established; however, several of the cuttings did not establish and were I I I I I AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel (858) 458-9044 Fax . (858) 458-0943 www.amec.com 319721000.1007/351-0703L104.doc Pagel Ms. Sherri Howard . . . . S. City of Carlsbad 16 July 2003 S ame ' 'dead. AMEC will continue to monitor success of the remedial measures in the areas where I they were implemented and make any necessary recommendations, which would be implemented in fall or winter of 2003. I.. During the June site visit, AMEC noted that individuals had walked through the mitigation site. and broken off branches of many of the container plants along the revegetated access road, killing 'severalof these trees: In addition,--four of the established cuttings.installed as remedial I measures on 25 January had been pulled out of the ground or were broken. AMEC, in coordination with the City, will continue to monitor the mitigation site and document further use and abuse of the mitigation site. AMEC and the City will continue to take action to prevent fUrther detrimental use of the mitigation site. In response to the use of the mitigation site by homeless migrant farm workers, the City created flyers printed in Spanish prohibiting trespassing and personal use of the. I mitigation site. These flyers were posted at the entrance to the mitigation site and throughout. the mitigation site, especially in the area'of high use. In addition, the City plans to build an ' exclusion 'fence around the mitigation site to discourage further use of the site. AMEC and the. I City will continue to monitor migrant farm worker trespassing and personal use of the mitigation site. AMEC will continue 'monthly horticultural monitoring, visits and submit monthly progress reports for year two in accordance with the project's permits and agreements. Please call me at, (858) 458-9044, extension 264, or email me at jessica.walker@amec.com, if you have any ., questions. S ' "' . • : . ' Sincerely, AMEC Earth & Environmental, Inc. I Jessie Walker 1 ' Botanist cc: Debbie Fromme; Native Landscape, Inc. File . • '. S Contracts. S ' • I. I I. I. 319721 000-1007/3151-0703L104.doc Page ameê I " 16 July 2003 Project No. 319721 0O01OQ7 Ms. Sherri Howard Project Manager City of Carlsbad I Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 ISubject:. Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): Final Monthly Horticultural Monitoring Report for Year I ' Two Dear Ms. Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this final monthly horticultural monitoring letter, report for year two in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000 The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2);. United States Army Corps of Engineers Permit Application No. 97-20130-TCD .and No. 97-20131-TCD, City of Carlsbad, California, (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement ' No. 5-044-97 & 5-045-97; CDFG California 'Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, monthly horticultural monitoring reports must be completed for the City of Carlsbad (City) and .the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits Will occur at a minimum of 8 'times a year, and horticultural letter reports will be completed a minimum of 8 times a year. On 11 July 2003, AMEC periormed the last monthly horticultural site visit for .year two of , the Cannon Road Macario Bridge wetland area horticultural monitoring program.. During the site visit, biologists Jessie Walker and Mall Guilliams from AMEC, Mark Girard of Native Landscape, and Sherri Howard from the City assessed the condition of the mitigation site. Issues addressed included health of wetland vegetation, 'weed .control, remedial measures, and the homeless use of the mitigation site. 319721000-1007/3151-0703L106.doc AMEC Earth & Environmental, Inc. ' . Page 1 5510 Morehouse Drive San Diego, CA92121 Tel (858) 458-9044 Fax (858) 458-0943 wwwamec.com ' ' I i Ms Sherri Howard City of Carlsbad 16 July 2003 ameO During the site visit, many volunteer narrow-leaved willow (Salix exigua) and arroyo willow (Salix lasiolepis) saplings were observed growing in the mitigation site. In addition, evening primrose (Qenothera elata ssp. hirsutissima), goldenbush (Isocoma menziesii), California rose (Rosa californica), and California blackberry (Rubus ursinus) were flowering, and deerweed (Lotus .scoparius), arrow. weed (Pluchea sericea), .saltmarsh.fleabane .(Pluchea odorata), California. mugwort (Artemisia douglasiana), and cattail (Typha sp ) were observed setting seed No new nonnative, invasive plants were located I during the site visit. Native Landscape has begun spraying the highly invasive perennial pepperweed (Lepidium latifolium) with herbicide to eradicate the existing plants and any new growth. The sprayed plants were extremely stunted. and showed visual evidence of herbicide treatment. This species was first identified by AMEC .I at the mitigation site in June 2002; AMEC has been recommending that this species be eradicated by removing the rhizomes, Which is the most cost-effective form of eradication for a small population. The control of this species will continue untiL it is eradicated from the I mitigation site. AMEC will continue to monitor the perennial pepperweed population and make any necessary recommendations. AMEC will also continue to monitor the mitigation site for any new populations. . . . . . . . . The remedial measures installed on 25 January 2003 were assessed during the mitigation site visit. The cuttings on the revegetated access road and underneath the bridge were continuing. to grow. Native . Landscape turned off the irrigation under the bridge in the vicinity of the cuttings that were installed in January 2003. AMEC expressed concern that the irrigation may have been turned off prematurely since the cuttings had only been installed for less than 6 months. . AMEC will.continue to monitor this area, focusing on: the cuttings, and make S recommendations if. they , appear stressed: AMEC observed yerba mansa (Anernopsis californica) and western ragweed (Ambrosia psilostachya) seedlings under the bridge where seed was raked into the ground during January as part of the remedial measures. During the site visit, Mark Girard spoke with two Hispanic men who were using the mitigation site to bathe. He showed them the flyers that were posted near their bathing area and helped them read a flyer, informing them that they are not allowed to use the mitigation site for personal uses. These flyers, written in Spanish, were posted in June 2003 and are located throughout the mitigation site. During the next couple of months, the City plans to build an exclusion fence around the mitigation site to discourage further use of the site. The continued presence of migrants in the high use area of the site is compromising the success of the site. Thp area is compacted and there are barren spots that are devoid of vegetation. The continued homeless presence also poses a safety and health problem. AMEC and the City will continue to monitor the migrant farm worker trespassing and personal usdof the mitigation site. Native Landscape has increased the irrigation in the high' use area to discourage further personal use by the homeless. AMEC noted that the freshwater marsh habitat will likely expand across the revegetated access road as a result of the increased irrigation. This portion of the revegetated access road is slightly higher in elevation than the surrounding area that currently I 319721000-1 007/3151-0703L106.doc Page 2 Ms. Sherri Howard City of Carlsbad . S 16 July 2003 S S ame& supports freshwater marsh habitat. Once the additional irrigation is teminated, the freshwater marsh habitat may not persist on its own unless the elevation is lowered slightly. AMEC will continue monthly horticultural monitoring visits and submit progress reports for year • three in accordance with. the project's permits and. agreements.. Please call. me at (858) 458-9044, extension 264, or email me at jessica walker@amec corn, if you have any. questions. ......S S S 5 5 • S 5 • S 5 Sincerely, S 5 5 5 5 AMEC Earth & Environmental, Inc. S • S • S Jessie Walker S S • S Botanist S • 1 JW/rl cc: Debbie Fromme; Native Landscape, Inc. S S File Contracts S S 319721 000-100713151-07031106.doc Page .3 ameO.. 16 September 2003 . Project No. 319721.000-1007 Ms. Sherri Howard . I Project Manager '.. . . .. . . . . .. .. S :. City of Carlsbad Engineering'Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): 'First Horticultural Monitoring Report for Year Three Dear Ms. Howard: ' AMEC Earth & Erivirohméntal,' Inc. (AMEC),'.'ubmits the first horticultural monitoring letter ..- report for year three in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000. The project is authorized 'under United States Fish and Wildlife Service Biological Opinion on Cannon Road (Reaches I and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5044-97 & 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the. Wetland Mitigation Plan, monthly horticultural monitoring reports must be completed for the City of Carlsbad (City) and ,the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three through five, horticultural monitoring visits will occur at a, minimum of .8 times a year, ,and horticultural letter reports will be completed after each visit. On 3 September 2003, AMEC performed the first -horticultural site visit for year three of the biological monitoring program for the Cannon Road Macario Bridge wetland area. During the site-visit, AMEC biologists Jessie Walker and Matt Guilliams and City Project Manager Sherri Howard assessed the condition of the mitigation site. Issues addressed included health of wetland vegetation, weed control, remedial measures, and the homeless use of the mitigation site. Although 'most plant species within the restorâtion'area.'have flowered and set seed; native ' species such as saltrnarsh fleabane (Pluchea odorata), evening primrose (Oenofhera elata' ssp. hirsutissima), and California mugwort (Artemisia douglasiana) were. observed in flower during the survey. Deerweed (Lotus scoparius), arrow'weed (Pluchea sencea), goldenbush (Isocoma menziesi,, California wild rose Rosa califomica), California blackberry (Rubus ursinus), and cattail (Typha sp.) were' observed setting seed. Many volunteer narrow-leaved willow (Salix exigua) and arroyo willow (Salix lasiolepis) saplings were observed growing in the mitigation site during the previous site visit (16 July 2003). These, natural recruits continue to thrive, greatly increasing the vegetative cover.on access trails and between existing plants off-trail. 319721 000-1 007/3151-0903L1 38.doc 'I AMEC Earth & Envirénmental, inc. , S , Page 1 5510 Morehouse Drive S. San Diego, CA 92121 . • , , , Tel (858) 458-9044 ' ' . • Fax (858) 458-0943 www.amec.com S i Ms. Sherri Howard City of Carlsbad 16 September, 2003 I No new nonnative, invasive plants were located during the site visit. Native Landscape has' implemented a rigorous control program to eradicate a localized population of the invasive' species perennial pepperweed (Lepidium latifolium). Control efforts have been highly successful; only a few (5 tolO individuals)' isolated plants were observed resprouting during the monitoring visit ,. AMEC contacted Native Landscape. regarding these ..seedlings 5 September 2003 and Native Landscape plans to remove these individuals during the second week 'of September. : Due to the' aggressive nature' of 'this species,' 'AMEC' biologists will continue to monitor the mitigation site for new populations and resprouting individuals in the existing treatment area. Oystershell scale (Lepidosaphes u/mi), a small, inconspicuous insect, has been observed on: the new growth of several willow (Salix spp.) species. A previous outbreak of scale was sprayed with insecticidal oil during the spring of 2003. AMEC will assess the severity of the current scale infestation and provide remedial measures over the coming months. The presence of migrant workers throughout the mitigation sitez had been impacting."vegetation and affecting water quality. The City' has implemented many, strategies. to discourage trespassing 'and personal use of the project area, including fencing of certain high use areas, 'posting of signage in English and Spanish, and development of biotic and abiotic deterrents.. Native Landscape has 'increased the irrigation, lowered the ground level, and planted .hydrophytic vegetation in the high-use wetland area in the southern portion of the mitigation site. This developing 'wetland had been used by migrants for bathing and for washing clothes.' No evidence of these activities was observed during the site visit. It is probable that the lack of access and increased wetland, characteristics resulting from the recently implemented measures have discouraged migrant usage., 'AMEC and the' City will continue to' monitor migrant farm worker activity' within the mitigation 'site. AMEC will continue horticultural monitoring visits and submit progress reports for year three in accordance with the project's permits and agreements. In addition, quantitative data will be collected during a botanical monitoring site visit scheduled for the beginning of October. If you have any questions, please call me at (858) 458-9044, extension 328, or email me at matt.guilliamsamec.com. Sincerely, AMEC Earth & Environmental, Inc. Matt Guilliams ' Botanist MG/ri cc: Debbie Fromme; Native Landscape, Inc. File Contracts 319721000-1007/3151-0903L138.doc Page 2 I I' I I I .1 I ameO.. I 9 December 2003 .Project. No..3i9721000-1001 : .. Ms. Sherri Howard S Project Manager . S City of Carlsbad I . Engineering Department . . ..., . 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts for the Cannon Road Extension Project (Macario Bridge): Second Horticultural Monitoring Report for Year Three Dear Ms. Howard: AMEC Earth & Environmental, Inc. (AMEC), submits this second letter report. for year three of the horticultural monitoring program in accordance with the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project in Carlsbad, California .I........ (July 2000). The project is authorized under United States Fish and Wildlife Service. Biological : Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application N0 97-20130-TCD and No. 97-20131-TCD, City of Carlsbad, California (1-6-97-F- 51); California Department Fish and Game (CDFG) Section 1 1601 Streambed Alteration Agreement No. 5-044-97 and 5-045-97; CDFG California lncidental'Take Permit (No. 2081- 1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Wetland Mitigation Plan, monthly horticultural monitoring reports must be I completed for the City of Carlsbad (City) and the landscape maintenance contractor, Native .Landscape, Inc. (Native Landscape), for years one and two of the Cannon Road Extension Project. For years three though five, horticultural monitoring visits will occur at a minimum, of. 8 times a year, and horticultural letter reports will be completed after each visit. 1 On 30 October 2003, AMEC performed the second horticUltural site visit for year three of the I Cannon Road Macario Bridge wetland area biological monitoring program . During the. site visit, AMEC botanist Matt Guilliams assessed the condition of the mitigation site The willow riparian restoration area directly under the bridge is performing well, with hundreds of naturally recruiting I . willow (Salix spp.) saplings establishing a dense, low thicket with interspersed shrub and herb species. The freshwater marsh component in this area is also well established, with dense stands of cattail (Typha latifolia) and California bulrush (Scirpus californicus) along the banks of ..I the waterways. Perennial water flow and inundation in the extended freshwater marsh in the southwest corner of the project area have created ideal conditions for the growth of native hydrophytic vegetation. Cattail and yerba mansa (Anemopsis' califomica) have already begun to .I .establish in this area. The access trail in the eastern portion of the project area has overgrown with dense vegetation, although a few sparsely vegetated areas occur. On 7 November 2003, 319721000-100713151-1203L175.doc AMEC Earth & Environmental inc. • . . 5510 Morehouse Drive • Page 1 San Diego, CA2121 . . . Tel (858) 458-9044 . Fax (858) 458-0943 www.amec.com Ms. Sherri Howard City of Carlsbad 9 December 2003 ' ame, Native Landscape seeded these areas as a remedial measure per the request of AMEC with' one pound of each of the following native species: Douglas mugwort (Artemisia douglasiana), yerba mansa, and western ragweed (Ambrosia psi/os fachya). One pound of mulefat (Baccharis salicifo/ia) was seeded in these areas during a separate visit later in the week. During the .. -'. '.survey,: many plants were ,in flower, including, coastal gOldenbush (Isocoma . rnenziesii,.. California bulrush broom bacchans (Bacchans sarothroides), saltmarsh fleabane (Pluchea odorata), Douglas 'mugwort, cattail, coyotebush (Baccháris pilularis), mulefàt, and western ' " ragweed. Cocklebur (Xanthium strumarium), California rose (Rosa californica), and Palmer's, sagewort (Artemisia pa/men) were observed setting seed. All supplemental . irrigation was discontinued throughout the project area in mid-November 2003. Per regulatory agency permits, the project area must be off water for a period of one year prior to agency sign-off.. No new nonnative plants were located during the site visit. Native Landscape has been controlling pepperweed (Lepidium latifolium) and bristly ox-tongue (Picris echioides) where necessary. Control efforts have been highly successful, with only a 'few bristly ox-tongue resprouting. Oystershell scale (Lepidosaphes ulmi), a small, inconspicuous insect,' has been observed on the ,new growth of several willow species. A previous outbreak of scale was sprayed with' insecticidal oil during spring 2003. Aerosolized oils are effective at smothering certain insects and are safe to use during the majority of the year. Operating outside the bird breeding/nesting season, however, more aggressive pesticides can be safely utilized to eradicate insect pest. problems. Given the severity of the scale infestation in the willow and cottonwood population in the eastern portion óf the. .project area,. jack - Olmstead of Plant-tek . Inc. , sUggested the application of' Malathion: This chemical is very effective and is currently being sprayed in.. lagoons in San Diego County for mosquito control. Per City agreement, Plant-tek 'will be 'direct spot spraying infested willows on .10 December. AMEC biologists will be present to provide access to the project area and guidance, if necessary. . The presence of migrant workers throughout the mitigation site had been impacting vegetation and affecting water quality: The City has implemented many strategies to discourage trespassing and personal use of the project area, including fencing of certain 'high use areas, I 'posting of signage in English and Spanish, and development of biotic and abiotic deterrents. Per .AMEC guidance, Native Landscape has increased the irrigation, lowered the ground level, and planted hydrophytic vegetation in the. ,high-use wetland area in the southern portion of the mitigation site as a remedial measure. to deter .trespassing and aid in the success of the site. This developing wetland had been used by migrants for bathing and washing clothing, and recent activity was noted. during the horticultural monitoring visit in October.: .Additional. I measures have since been implemented in this area. On 7 November 2003, AMEC botanist Jessie Walker monitored the hand broadcast of wetland seed mix in the southwest corner of the I project area and the installation of 20 one-gallon containers of western spiny rush (Juncus I .acutus ssp. IeopoJdi,) in the, same area.near the eastern fence boundary. These spine-tipped, perennial shrubs should provide physical deterrent once established.. Also on 7 November, the chain-link fence in the southwest corner was extended to the east and northwest and a new I , segment of fence was installed at the eastern project limit near the dirt access road. AMEC and the City will continue to monitor migrant farm worker activity .within the mitigation site. I' 319721000-100713151-1203L175.doc Page 2 Ms. Sherri Howard City of Carlsbad S 9 December 2003 ameo Botanical monitoring data were collected on 23 October and 30 October 2003. These data will be incorporated in the Third Annual Report for the purposes of evaluating project development relative to the success standards established in the mitigation plan. This report will be completed in late December for distribution .to the City and Agencies in early January. AMEC will continue härticultüral monitoring visitsandéubmit progress reports for year three in accordance with the project's permits and agreements. The next horticultural monitoring visit is tentatively scheduled for mid-December. If you have any questions, please call me at (858) 458-9044, extension 328, or email me at matt.guilliamsamec.com. Sincerely, AMEC Earth & Environmental, Inc. Mall Guilliams Botanist S MG:vm PC:. Debbie Fromme;t Native Landscape, Inc. File . .: .• . .S 319721000-100713151-1203L175.doc Page 3 H APPENDIX,B PHOTO VIEWPOINT LOCATIONS FOR OCTOBER 2002 AND OCTOBER 2003 I 'L /'AA:JV ' d f I' -I1 Esw.*c 4 stj Cannon Road I ameclO Photograph Viewpoints 2002 - 2003 Wetland Mitigation Site Graphics2/3151/319721000_1007_Cannon Road/Transect Photos 2002-2003/Cannon Rd Transect 1A.fh8 FIGURE I OAPP $ 4 — :- - M4, 1731.1 ft lei Photograph Viewpoints 2002- 2003 1 -'I r 41 Photograph Viewpoints 2002- 2003 I E cr1 •' , Photograph Viewpoints 2003 Photograph Viewpoints 2002- 2003 1 1R I Cannon Road I am Photograph Viewpoints 2002 - 2003 Wetland Mitigation Site 0 Graphics2/3151/319721000_1007_Cannon Road/Transect Photos 2002-2003/Cannon Rd Transect 5.fhB FIGURE B7 iIT1&L Photograph Viewpoints 2002- 2003 APPENDIX C PHOTO DOCUMENTATION AT TRANSECT LOCATIONS 0 ; T lie- - ____________ - - ' '•-s • t1 - ,Im Transect Photoaraohs 2002- 2003 I I (low OWNWINAVA - .- \ V J 4 I \ L Transect Photographs 2002- 2003 I C-f APPENDIX D RAW BOTANICAL DATA Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 Transect Species Common Name Begin (m) End (m) Cover (m) 1 Baccharis salicifolia mulefat 0 0.99 0.99 1 Baccharis pilularis coyote bush 0.44 0.83 0.39 1 Bare Ground bare ground 0.99 1.06 0.07 1 Baccharis salicifolia mulefat 1.06 1.51 0.45 1 Bare Ground bare ground 1.51 1.85 0.34 1 Baccharis salicifolia mulefat 1.85 2.09 0.24 1 Bare Ground bare ground 2.09 14.65 12.56 1 Artemisia douglasiana Douglas mugwort 14.65 14.96 0.31 1 Bare Ground bare ground 14.96 14.99 0.03 1 Salix lasiolepis arroyo willow 14.99 15.44 0.45 1 Litter Litter 15.44 15.9 0.46 1 Salix lasiolepis arroyo willow 15.9 16.38 0.48 1 Heliotropium curassivicum salt heliotrope 16.44 16.46 0.02 1 Bare Ground bare ground 16.38 17.05 0.67 1 Salix gooddingii black willow 17.05 17.82 0.77 1 Ambrosia psilostachya western ragweed 17.02 17.09 0.07 1 Ambrosia psilostachya western ragweed 17.57 18.36 0.79 1 Bare Ground bare ground 18.46 19.22 0.76 1 Baccharis salicifolia mulefat 19.22 19.31 0.09 1 Bare Ground bare ground 19.31 19.84 0.53 1 Baccharis salicifolia mulefat 19.84 20.02 0.18 1 Bare Ground bare ground 20.02 22.07 2.05 1 Salix exigua narrow-leaved willow 22.07 23.04 0.97 1 Bare Ground bare ground 23.04 23.73 0.69 1 Salix lasiolepis arroyo willow 23.73 27.39 3.66 1 Bare Ground bare ground 27.39 27.68 0.29 1 Salix exigua narrow-leaved willow 27.68 28.54 0.86 1 Bare Ground bare ground 28.54 30 1.46 2 Bare Ground bare ground 0 4.07 4.07 2 Typha latifolia tall cattail 4.07 4.16 0.09 2 Bare Ground bare ground 4.16 4.45 0.29 2 Pluchea odorata saltmarsh fleabane 4.45 4.47 0.02 2 Bare Ground bare ground 4.47 6.66 2.19 2 Baccharis salicifolia mulefat 6.66 7.92 1.26 2 Ambrosia psilostachya western ragweed 7.06 7.15 0.09 2 Salix lasiolepis arroyo willow 7.87 9.94 2.07 2 Oenothera elata ssp. hirsutissima evening primrose 8.1 8.42 0.32 2 Scirpus californicus California bulrush 8.22 8.25 0.03 2 Picris echioides bristly ox-tongue 8.73 8.9 0.17 2 Typha latifolia tall cattail 8.86 8.95 0.09 2 Baccharis salicifolia mulefat 9.51 9.98 0.47 2 Ambrosia psilostachya western ragweed 8.94 9.18 0.24 2 Oenothera elata ssp. hirsutissima evening primrose 9.11 9.25 0.14 2 Artemisia douglasiana Douglas mugwort 9.57 9.63 0.06 2 Bare Ground bare ground 9.98 10.13 0.15 2 Scirpus californicus California bulrush 10.13 25.03 14.9 2 Sonchus oleraceus common sow thistle 10.09 10.11 0.02 2 Baccharis pilularis coyote bush 10.61 10.74 0.13 2 Cotula coronopifolia brass buttons 11.27 11.69 0.42 2 Anemopsis californica yerba mansa 12.06 12.29 0.23 I I I I I I I I I I I I I I 1 1 I Percent Cover 0.6% 0.2% 0.0% 0.3% 0.2% 0.1% 7.0% 0.2% 0.0% 0.3% 0.3% 0.3% 0.0% 0.4% 0.4% 0.0% 0.4% 0.4% 0.0% 0.3% 0.1% 1 .1 I 0/ I /0 0.5% 0.4% 2.0% 0.2% 0.5% 0.8% ?•°'° 0.0% 0.2% 0.0% 1.2% 0.7% 0.1% 1.2% 0.2% 0.0% 0.1% 0.0% 0.3% 0.1% 0.1% 0.0% 0.1% 8.3% 0.0% 0.1% 0.2% 0.1% I I I I [I LII I I I I I I 11 I I I I 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 Pluchea odorata Anemopsis californica Scirpus maritimus Typha latifolia Anemopsis californica Pluchea odorata Anemopsis californica Salix lasiolepis Salix lasiolepis Pluchea odorata Anemopsis californica Pluchea odorata Salix lasiolepis Pluchea odorata Anemopsis californica Picris echioides Pluchea odorata Bare Ground Anemopsis californica Bare Ground Scirpus californicus Salix exigua Bare Ground Scirpus californicus Bare Ground Scirpus californicus Litter Bare Ground Salix lasiolepis Bare Ground Cotula coronopifolia Litter Bare Ground Litter Salix gooddingil Rubus ursinus Juncus acutus ssp. leopoldil Rubus ursinus Salix lasiolepis Polypogon monspeliensis Polypogon monspeliensis Salix lasiolepis Rosa californica Polypogon monspeliensis Rubus ursinus Bare Ground Rubus ursinus Rosa californica Salix lasiolepis Bare Ground Baccharis salicifolia Polypogon monspeliensis Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 saltmarsh fleabane 12.65 yerba mansa 12.83 prairie bulrush 12.64 tall cattail 12.8 yerba mansa 13.32 saltmarsh fleabane 15.69 yerba mansa 16.11 arroyo willow 18.08 arroyo willow 18.68 saltmarsh fleabane 19.51 yerba mansa 19.81 saltmarsh fleabane 20.86 arroyo willow 21.48 saltmarsh fleabane 22.81 yerba mansa 22.75 bristly ox-tongue 23.3 saltmarsh fleabane 24.06 bare ground 25.03 yerba mansa 25.19 bare ground 25.43 California bulrush 25.73 narrow-leaved willow 26.22 bare ground 26.36 California bulrush 26.91 bare ground 27.73 California bulrush 28.1 Litter 28.16 bare ground 28.53 arroyo willow 28.95 bare ground 29.49 brass buttons 29.59 Litter 29.74 bare ground 0 Litter 0.61 black willow 0.9 California blackberry 1.15 sw spiny rush 2.28 California blackberry 2.76 arroyo willow 3.44 rabbitfoot grass 2.99 rabbitfoot grass 3.61 arroyo willow 3.92 California rose 4.41 rabbitfoot grass 5.16 California blackberry 5.32 bare ground 5.82 California blackberry 6.02 California rose 6.08 arroyo willow 6.08 bare ground 6.56 mulefat 6.7 rabbitfoot grass 6.81 12.83 0.18 0.1% 13.28 0.45 0.3% 13.55 0.91 0.5% 20.77 7.97 4.4% 13.65 0.33 0.2% 15.94 0.25 0.1% 16.4 0.29 0.2% 18.22 0.14 0.1% 19.07 0.39 0.2% 20.61 1.1 0.6% 24.15 4.34 2.4% 21.49 0.63 0.3% 23.17 1.69 0.9% 23.37 0.56 0.3% 23.69 0.94 0.5% 23.99 0.69 0.4% 24.22 0.16 0.1% 25.19 0.16 0.1% 25.43 0.24 0.1% 25.73 0.3 0.2% 26.19 0.46 0.3% 26.36 0.14 0.1% 26.91 0.55 0.3% 27.73 0.82 0.5% 28.1 0.37 0.2% 28.16 0.06 0.0% 28.53 0.37 0.2% 28.95 0.42 0.2% 29.49 0.54 0.3% 29.59 0.1 0.1% 29.74 0.15 0.1% 30 0.26 0.1% 0.61 0.61 0.3% 0.9 0.29 0.2% 3.33 2.43 1.4% 1.28 0.13 0.1% 2.82 0.54 0.3% 5.36 2.6 1.4% 3.55 0.11 0.1% 3.17 0.18 0.1% 4.3 0.69 0.4% 4.26 0.34 0.2% 5.01 0.6 0.3% 5.82 0.66 0.4% 5.57 0.25 0.1% 6.02 0.2 0.1% 6.43 0.41 0.20/6 6.21 0.13 0.1% 6.56 0.48 0.3% 6.7 0.14 0.1% 6.86 0.16 0.1% 8.99 2.18 1.2% 2 I 1 I 3 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 Rubus ursinus California blackberry 7.28 Salix lasiolepis arroyo willow 7.34 Ambrosia psilostachya western ragweed 7.59 Baccharis salicifolia mulefat 7.88 Pluchea odorata saltmarsh fleabane 8.33 Rubus ursinus California blackberry 8.36 Bare Ground bare ground 8.99 Eleocharis sp. spikerush 9.12 Scirpus sp. bulrush 9.14 Bare Ground bare ground 9.21 Baccharis salicifolia mulefat 9.42 Artemisia douglasiana Douglas mugwort 10.32 Salix lasiolepis arroyo willow 10.4 Artemisia douglasiana Douglas mugwort 11.11 Apium graveolens celery 11.41 Typha latifolia tall cattail 12.68 Salix lasiolepis arroyo willow 17.81 Baccharis salicifolia mulefat 18.1 Scirpus maritimus prairie bulrush 19.19 Ambrosia psilostachya western ragweed 20.68 Salix lasiolepis arroyo willow 20.66 Scirpus maritimus prairie bulrush 20.88 Ambrosia psilostachya western ragweed 21.53 Anemopsis californica yerba mansa 21.89 Pluchea odorata saltmarsh fleabane 21.97 Litter Litter 22.01 Baccharis salicifolia mulefat 22.1 Litter Litter 22.24 Scirpus maritimus prairie bulrush 22.24 Litter Litter 23.51 Baccharis salicifolia mulefat 23.55 Litter Litter 23.73 Baccharis salicifolia mulefat 24.21 Salix lasiolepis arroyo willow 24.23 Scirpus maritimus prairie bulrush 25.12 Artemisia palmed Palmer's sagewort 25.6 Litter Litter 25.62 Artemisia douglasiana Douglas mugwort 25.83 Litter Litter 25.88 Baccharis salicifolia mulefat 26.41 Pluchea odorata saltmarsh fleabane 26.58 Salix lasiolepis arroyo willow 26.95 Bare Ground bare ground 28.63 Typha latifolia tall cattail 29.12 Pluchea odorata saltmarsh fleabane 29.23 Scirpus californicus California bulrush 29.86 Bare Ground bare ground 0 Baccharis salicifolia mulefat 0.05 Bare Ground bare ground 0.01 Pluchea odorata saltmarsh fleabane 1.15 Baccharis salicifolia mulefat 1.26 Litter Litter 1.66 7.37 0.09 0.0% 8.06 0.72 0.4% 7.7 0.11 0.1% 7.9 0.02 0.0% 8.37 0.04 0.0% 8.52 0.16 0.1% 9.12 0.13 0.1% 9.21 0.09 0.1% 9.17 0.03 0.0% 9.42 0.21 0.1% 10.37 0.95 0.5% 10.37 0.05 0.0% 12.93 2.53 1.4% 11.19 0.08 0.0% 11.47 0.06 0.0% 18.51 5.83 3.2% 19.82 2.01 1.1% 19.1 1 0.6% 20.63 1.44 0.8% 20.74 0.06 0.0% 21.85 1.19 0.7% 21.27 0.39 0.2% 21.61 0.08 0.0% 21.93 0.04 0.0% 22.01 0.04 0.0% 22.1 0.09 0.0% 22.26 0.16 0.1% 22.26 0.02 0.0% 23.51 1.27 0.7% 23.55 0.04 0.0% 23.73 0.18 0.1% 24.21 0.48 0.3% 25.52 1.31 0.7% 24.69 0.46 0.3% 25.46 0.34 0.2% 25.62 0.02 0.0% 25.83 0.21 0.1% 25.88 0.05 0.0% 26.41 0.53 0.3% 26.98 0.57 0.3% 26.91 0.33 0.2% 28.63 1.68 0.9% 29.12 0.49 0.3% 30 0.88 0.5% 29.34 0.11 0.1% 29.91 0.05 0.0% 0.05 0.05 0.0% 0.1 0.05 0.0% 1.15 1.14 0.6% 1.31 0.16 0.1% 1.66 0.4 0.2% 1.75 0.09 0.1% I I I I L 1 I 1 I LI d I I I 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 Salix gooddingii 4 Bare Ground 4 Litter 4 Bare Ground 4 Artemisia douglasiana 4 Bare Ground 4 Anemopsis californica 4 Bare Ground 4 Artemisia douglasiana 4 Bare Ground 4 Artemisia palmeri 4 Bare Ground 4 Artemisia douglasiana 4 Artemisia palmeri 4 Bare Ground 4 Anemopsis californica 4 Bare Ground 4 Anemopsis californica 4 Artemisia douglasiana 4 Bare Ground 4 Anemopsis californica 4 Polypogon monspeliensis 4 Artemisia douglasiana 4 Bare Ground 4 Baccharis salicifolia 4 Bare Ground 4 Bacchris salicifolia 4 Salix lasiolepis 4 Artemisia douglasiana 4 Bare Ground 4 Artemisia douglasiana 4 Bare Ground 4 Baccharis salicifolia 4 Artemisia douglasiana 4 Bare Ground 4 Scirpus maritimus 4 Pluchea odorata 4 Salix lasiolepis 4 Salix gooddingii 4 Anemopsis californica 4 Baccharis salicifolia 4 Artemisia douglasiana 4 Baccharis salicifolia 4 Salix lasiolepis 4 Artemisia douglasiana 4 Litter 4 Artemisia douglasiana 4 Salix lasiolepis 4 Bare Ground 4 Ambrosia psilostachya 4 Bare Ground 4 Salix gooddingii Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 black willow 1.75 bare ground 2.73 Litter 3.5 bare ground 3.58 Douglas mugwort 3.79 bare ground 3.84 yerba mansa 4.3 bare ground 4.53 Douglas mugwort 4.63 bare ground 5.01 Palmer's sagewort 5.2 bare ground 5.21 Douglas mugwort 5.5 Palmer's sagewort 552 bare ground 6.38 yerba mansa 7.05 bare ground 7.17 yerba mansa 8 Douglas mugwort 8.47 bare ground 8.47 yerba mansa 9.18 rabbitfoot grass 9.31 Douglas mugwort 9.42 bare ground 9.54 mulefat 9.71 bare ground 9.96 mulefat 10.16 arroyo willow 10.45 Douglas mugwort 10.65 bare ground 11.62 Douglas mugwort 11.69 bare ground 11.81 mulefat 11.19 Douglas mugwort 11.44 bare ground 13.01 prairie bulrush 13.85 saltmarsh fleabane 14.35 arroyo willow 14.3 black willow 14.42 yerba mansa 15.14 mulefat 15.52 Douglas mugwort 16.83 mulefat 17.67 arroyo willow 18.88 Douglas mugwort 19.57 Litter 19.74 Douglas mugwort 20.54 arroyo willow 22.04 bare ground 22.27 western ragweed 23.38 bare ground 23.47 black willow 23.9 2.73 0.98 0.5% 3.5 0.77 0.4% 3.58 0.08 0.0% 3.79 0.21 0.1% 3.84 0.05 0.0% 4.3 0.46 0.3% 4.53 0.23 0.1% 4.63 0.1 0.1% 5.01 0.38 0.2% 5.2 0.19 0.1% 5.21 0.01 0.0% 5.5 0.29 0.2% 6.38 0.88 0.5% 5.54 0.02 0.0% 7.05 0.67 0.4% 7.17 0.12 0.1% 8 0.83 0.5% 8.35 0.35 0.2% 8.56 0.09 0.0% 9.18 0.71 0.4% 9.36 0.18 0.1% 9.44 0.13 0.1% 9.54 0.12 0.1% 9.71 0.17 0.1% 9.96 0.25 0.1% 10.16 0.2 0.1% 10.99 0.83 0.5% 11.62 1.17 0.7% 10.83 0.18 0.1% 11.69 0.07 0.0% 11.81 0.12 0.1% 12.19 0.38 0.2% 11.45 0.26 0.1% 13.01 1.57 0.9% 13.85 0.84 0.5% 17.63 3.78 2.1% 14.43 0.08 0.0% 14.55 0.25 0.1% 18.93 4.51 2.5% 15.17 0.03 0.0% 16.98 1.46 0.8% 17.62 0.79 0.4% 18.47 0.8 0.4% 19.74 0.86 0.5% 19.63 0.06 0.0% 20.54 0.8 0.4% 22.26 1.72 1.0% 22.27 0.23 0.1% 23.38 1.11 0.6% 23.47 0.09 0.0% 23.9 0.43 0.2% 26.55 2.65 1.5% I Li I I 1 I I I L] I I I [III I I L L] I I I I 5 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 Artemisia douglasiana Douglas mugwort 24.17 Ambrosia psilostachya western ragweed 25.18 Artemisia douglasiana Douglas mugwort 25.68 Salix lasiolepis arroyo willow 26.59 Artemisia palmed Palmer's sagewort 26.64 Baccharis salicifolia mulefat 26.93 Bare Ground bare ground 27.77 Artemisia douglasiana Douglas mugwort 27.97 Salix lasiolepis arroyo willow 28.66 Artemisia douglasiana Douglas mugwort 29.31 Bare Ground bare ground 29.52 Artemisia palmed Palmer's sagewort 0 Artemisia douglasiana Douglas mugwort 2.08 Salix gooddingii black willow 2.24 Ambrosia psilostachya western ragweed 3.38 Artemisia douglasiana Douglas mugwort 4.04 Ambrosia psilostachya western ragweed 4.93 Polypogon monspeliensis rabbitfoot grass 4.41 Scirpus sp. bulrush 5.04 Anemopsis californica yerba mansa 5.16 Rubus ursinus California blackberry 5.72 Anemopsis californica yerba mansa 7.2 Rubus ursinus California blackberry 8.07 Litter Litter 7.95 Ambrosia psilostachya western ragweed 8.08 Salix gooddingii black willow 8.48 Salix lasiolepis arroyo willow 8.67 Bare Ground bare ground 8.86 Salix gooddingii black willow 9.13 Rubus ursinus California blackberry 9.27 Salix lasiolepis arroyo willow 9.66 Scirpus maritimus prairie bulrush 10.23 Litter Litter 10.81 Rubus ursinus California blackberry 11.31 Scirpus maritimus prairie bulrush 11.31 Pluchea,odorata saltmarsh fleabane 11.85 Oenothera elata ssp. hirsutissima evening primrose 11.82 Bare Ground bare ground 12.04 Rubus ursinus California blackberry - 12.29 Juncus acutus ssp. leopoldii sw spiny rush 12.66 Anemopsis californica yerba mansa 12.87 Litter Litter 13.07 Ambrosia psilostachya western ragweed 13.1 Salix lasiolepis arroyo willow 13.45 Litter Litter 13.67 Ambrosia psilostachya western ragweed 13.88 Bare Ground bare ground 14.1 Ambrosia psilostachya western ragweed 14.32 Bare Ground bare ground 14.42 Anemopsis californica yerba mansa 14.45 Bare Ground bare ground 14.51 Baccharis salicifolia mulefat 14.55 24.68 0.51 - 0.3% 25.42 0.24 0.1% 27.51 1.83 1.0% 27.1 0.51 0.3% 26.93 0.29 0.2% 27.77 0.84 0.5% 27.97 0.2 0.1% 28.99 1.02 0.6% 29.49 0.83 0.5% 29.52 0.21 0.1% 30 0.48 0.3% 2.78 2.78 1.5% 2.63 0.55 0.3% 5.2 2.96 1.6% 3.81 0.43 0.2% 4.23 0.19 0.1% 5.07 0.14 0.1% 7.95 3.54 2.0% 5.49 0.45 0.3% 6.14 0.98 0.5% 5.77 0.05 0.0% 7.41 0.21 0.1% 8.49 0.42 0.2% 8.07 0.12 0.1% 8.15 0.07 0.0% 8.9 0.42 0.2% 8.86 0.19 0.1% 9.13 0.27 0.2% 9.71 0.58 0.3% 9.75 0.48 0.3% 10.75 1.09 0.6% 10.81 0.58 0.3% 11.31 0.5 0.3% 11.46 0.15 0.1% 12.3 0.99 0.6% 12.16 0.31 0.2% 12.04 0.22 0.1% 12.29 0.25 0.1% 12.71 0.42 0.2% 12.84 0.18 0.1% 13.07 0.2 0.1% 13.1 0.03 0.0% 13.45 0.35 0.2% 13.67 0.22 0.1% 13.88 0.21 0.1% 14.1 0.22 0.1% 14.36 0.26 0.1% 14.36 0.04 0.0% 14.45 0.03 0.0% 14.51 0.06 0.0% 14.55 0.04 0.0% 15.07 0.52 0.3% I I I I I I I I I I I I I I El: 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 5 Artemisia douglasiana Douglas mugwort 14.99 15.3 0.31 0.2% 5 Salix lasiolepis arroyo willow 15.06 17.66 2.6 1.4% 5 Polypogon monspeliensis rabbitfoot grass 15.27 16.51 1.24 0.7% 5 Pluchea odorata saltmarsh fleabane 16.23 16.56 0.33 0.2% 5 Artemisia douglasiana Douglas mugwort 17.12 17.36 0.24 0.1% 5 Bare Ground bare ground 17.66 17.74 0.08 0.0% 5 Baccharis salicifolia mulefat 17.74 17.91 0.17 0.1% 5 Bare Ground bare ground 17.91 18.02 0.11 0.1% 5 Typha latifolia tall cattail 18.02 21.04 3.02 1.7% 5 Oenothera elata ssp. hirsutissima evening primrose 18.01 18.49 0.48 0.3% 5 Scirpus californicus California bulrush 19.52 20.15 0.63 0.3% 5 Anemopsis californica yerba mansa 19.23 19.26 0.03 0.0% 5 Salix gooddingii black willow 20.31 22.27 1.96 1.1% 5 Salix lasiolepis arroyo willow 20.38 21.9 1.52 0.8% 5 Juncus acutus ssp. leopoldii sw spiny rush 21.6 21.76 0.16 0.1% 5 Scirpus maritimus prairie bulrush 21.64 22.16 0.52 0.3% 5 Artemisia douglasiana Douglas mugwort 21.55 22.43 0.88 0.5% 5 Litter Litter 22.43 22.76 0.33 0.2% 5 Salix lasiolepis arroyo willow 22.76 24.65 1.89 1.1% 5 Baccharis salicifolia mulefat 22.87 22.89 0.02 0.0% 5 Pluchea odorata saltmarsh fleabane 22.9 22.93 0.03 0.0% 5 Artemisia douglasiana Douglas mugwort 22.99 23.19 0.2 0.1% 5 Salix gooddingii black willow 23.04 25.08 2.04 1.1% 5 Anemopsis californica yerba mansa 23.41 24 0.59 0.3% 5 Baccharis salicifolia mulefat 23.73 23.85 0.12 0.1% 5 Artemisia douglasiana Douglas mugwort 24.88 25.05 0.17 0.1% 5 Litter Litter 25.05 25.31 0.26 0.1% 5 Baccharis salicifolia mulefat 25.3 25.66 0.36 0.2% 5 Salix lasiolepis arroyo willow 25.3 26.43 1.13 0.6% 5 Baccharis salicifolia mulefat 26.01 26.24 0.23 0.1% 5 Juncus acutus ssp. leopoldii sw spiny rush 26.02 26.2 0.18 0.1% 5 Salix exigua narrow-leaved willow 26.02 29.26 3.24. 1.8% 5 Rubus ursinus California blackberry 26.88 27.69 0.81 0.5% 5 Picris echioides bristly ox-tongue 27.71 27.93 0.22 0.1% 5 Typha latifolia tall cattail 28.2 30 1.8 1.0% 5 Rubus ursinus California blackberry 28.4 28.45 0.05 0.0% 5 Rubus ursinus California blackberry 28.7 28.91 0.21 0.1% 6 Salix gooddingii black willow 0 4.57 4.57 2.5% 6 Baccharis salicifolia mulefat 0 0.05 0.05 0.0% 6 Salix lasiolepis arroyo willow 3.8 6.92 3.12 1.7% 6 Typha latifolia tall cattail 6.41 9.13 2.72 1.5% 6 Pluchea odorata saltmarsh fleabane 5.79 6.06 0.27 0.2% 6 Salix lasiolepis arroyo willow 8.31 13.51 5.2 2.9% 6 Anemopsis californica yerba mansa 8.08 8.21 0.13 0.1% 6 Scirpus maritimus prairie bulrush 9.08 10.19 1.11 0.6% 6 Typha latifolia tall cattail 10.2 10.34 0.14 0.1% 6 Pluchea odorata salt'marsh fleabane 9.48 9.82 0.34 0.2% 6 Artemisia douglasiana Douglas mugwort 11.87 12.4 0.53 0.3% 6 Artemisia douglasiana Douglas mugwort 13.11 13.18 0.07 0.0% 6 Artemisia douglasiana Douglas mugwort 13.35 14.02 0.67 0.4% 6 Artemisia palmeri Palmer's sagewort 14.09 14.28 0.19 0.1% 6 Bare Ground bare ground 14.28 14.45 0.17 0.1% n. I I I I fl I I L LI I I I I I E I I I I 6 Artemisia douglasiana 6 Utter 6 Salix lasiolepis 6 Baccharis salicifolia 6 Baccharis pilularis 6 Ambrosia psilostachya 6 Litter 6 Salix lasiolepis 6 Ambrosia psilostachya 6 Artemisia douglasiana 6 Ambrosia psilostachya 6 Litter 6 Pluchea sericea 6 Salix lasiolepis 6 Baccharis salicirolia 6 Salix lasiolepis 6 Artemisia douglasiana 6 Litter 6 Artemisia palmed 6 Salix lasiolepis 6 Bare Ground 6 Salix lasiolepis 6 Salix gooddingii 6 Bare Ground 6 Salix lasiolepis 6 Scirpus californicus 6 Salix lasiolepis I I I I I I I I 11 14.55 0.1 14.8 0.25 16.85 2.05 1536 0.45 16.9 0.05 17.32 0.12 17.44 0.12 18.22 0.78 17.75 0.03 18.52 0.33 18.36 0.04 19.16 0.64 20 0.49 21.85 2.71 23.26 1.5 23:77 0.78 23.54 0.02 23.87 0.1 24.72 0.85 24.45 0.31 24.8 0.6 26.66 1.86 26.97 2.16 27.54 0.57 29.43 • 1.89 29.13 0.65 30 0.81 0.1% 01 /0 0.1% 1.1% 0.3% 0.0% 0.1% 0.1% 0.4% 0.0% 0.2% 0.0% 0.4% 0.3% 1.5% 0.8% 0.4% 0.0% 0.1% 0.5% 0.2% 0.3% 1.0% 1.2% 0.3% I .I I 0/ /0 0.4% 0.4% Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 Douglas mugwort 14.45 Litter 14.55 arroyo willow 14.8 mulefat 14.91 coyote bush 16.85 western ragweed 17.2 Litter 17.32 arroyo willow 17.44 western ragweed 17.72 Douglas mugwort 18.19 western ragweed 18.32 Litter 18.52 arrowweed 19.51 arroyo willow 19.14 mulefat 21.76 arroyo willow 22.99 Douglas mugwort 23.52 Litter 23.77 Palmer's sagewort 23.87 arroyo willow 24.14 bare ground 24.2 arroyo willow 24.8 black willow 24.81 bare ground 26.97 arroyo willow 27.54 California bulrush 28.48 arroyo willow 29.19 I I I I I I 7 T '41 IkL • A I . 1 . - 16 I-... All zz ' 'L ¶P40.!J 9tJL . .•-•.- -.•• SI .<oS_. .• -I• - - -•p• 1. •- . .'--• I S •-. ,, L. -~- - - - i-!; ---:-: - - - - - r --: - - - : - - -.- - - - •---_. - -: -. - - - - - -55i MèhUé F - >---------- .. First Annual Report for the Cannon Road Extension Project. S Wetland Mitigation for Reach I I Prepared for City of Carlsbad 1635 Faraday Avenue Carlsbad, California 92008 Febniary 2003 5510 Moithouse D,iw San Diego Cilrnia 92121 I c First Annual Report for the Cannon Road Extension Project Wetland Mitigation for Reach I .• Prepamdfor City of Carlsbad 1635 Faraday Avenue Carlsbad, California 92008 • S Prepamdby AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, California 92121 (858) 458-9044 Febmy 2003 Project No. 319721000-1007 City of Carlsbad Cannon Road Extension Project 7 February 2003 TABLE OF CONTENTS Page EXECUTIVE SUMMARY............................................................................................................. 1.0 INTRODUCTION ................................... .............................................. ............................. 2 1.1 Project Location ..................................................................................... .............. 2 1.2 Project History.....................................................................................................2 1.3 Project Objectives................................................................................................5 2.0 Success Standards ................................................................................................ 6 3.0 HORTICULTURAL MONITORING ........................................................ .......................... 6 3.1 Horticultural Parameters......................................................................................6 3.1.1 Seedling Establishment............................................................................6 3.1.2 Container Plant and Cutting Health .......................................................... 9 3.1.3 Natural Recruitment...............................................................................10 3.1.4 Irrigation.................................................................................................13 3.1.5 Nonnative.Plant Populations .................... . ................................................ 13 3.1.6 Destructive Human Uses .......................................................................14 3.1.7 Pests and Diseases ...............................................................................14 3.1.8 Wildlife Habitat Value ... .......................................... ................................ 15 4.0 BOTANICAL MONITORING .......................................................................................... 15 41 Monitoring Methods ............................................................................................16 • 4.2 Analysis of Botanical Monitoring ................................ ..........................................16 4.2.1 Percent Cover .............................. . .................................. . ...................... 16 4.2.2 Tree Heights ..........................................................................................19 5.0 EVALUATION OF RESTORATION SUCCESS AND RECOMMENDATIONS..............19 • 5.1 Evaluation of Restoration Success ....................................................................19 5.2 Recommendations for Year 2 ............................................................................19 6.0 REFERENCES ................................................... . ................... . ........ . ... ............... .... .......21 319721000-1007/3151-1202R158 Page City of Carlsbad Cannon Road Extension Project 7 February 2003 0 LIST OF FIGURES Figure 1 Regional Location...... .................................................. .. .......................................3 Figure 2 Cannon Road Wetland Mitigation Site Location...................................................4 Figure 3 Cannon Road Wetland Mitigation Site Photo Viewpoint Locations.......................8 Figure 4 Cannon Road Wetland Mitigation Site Transect Locations and Photograph Locations................................................................................... . ........................ 17 Uts13f1:1I* Table 1 Success Standards for the Cannon Road Wetland Mitigation Site.......................7 Table 2 Species Detected from the Seed Mix from the Cannon Road Wetland Mitigation Site ........ ................................. ................. .............................. ....... .......9 Table 3 Container Plant and Cutting Survival for Cannon Road Wetland Mitigation Site...................................................................................................................10 Table 4 Species Detected at the Cannon Road Wetland Mitigation Site .......................... ii Table 5 Plant Species Cover of the Cannon Road Wetland Mitigation Site.....................18 Table 6 Average Heights of Container Plants for the Cannon Road Wetland MitigationSite....................................................................................................19 LIST OF APPENDICES Appendix A 'Correspondence .............................................................................................. A-i Appendix B Photo Viewpoint Locations for August 2001 and October 2002 .......................B-I Appendix C Photo Documentation at Transect Locations ..................................................... C-i Appendix D Raw Botanical Data .........................................................................................D-1 319721000-1007/3151-1202R158 Page ii Ll MONTH YEAR . ., J F M A M J J A S 0 N D 2001.. . IC EC 2002. M R 2003 M R 2004 M R 2005 MI. R 2006 M RT City of Carlsbad Cannon Road Extension Project 7 February 2003 0 EXECUTIVE SUMMARY This is the first annual monitoring report of the wetland mitigation monitoring program for the temporary wetland impacts associated with the construction of Reach 1 of the Cannon Road Extension Project. This wetland mitigation program provides mitigation for temporary wetland impacts associated with the construction of Macario Bridge. AMEC Earth & Environmental, Inc. is the biological consulting firm responsible for the 5-year monitoring of the wetland mitigation site. A total of 2.58 acres of southern willow scrub and freshwater marsh were temporarily impacted during the construction of Macario Bridge. Of the 2.58 acres, approximately 0.68 acre was temporarily impacted during construction and another 1.9 acres were temporarily impacted during bridge construction and through the shading of native riparian vegetation under Macario Bridge. The wetland mitigation site consists of a revegetated access road, the area underneath Macario Bridge, and a revegetated slope in the northeastern portion of the wetland mitigation site. All success standards for the wetland mitigation site for year 1 have been achieved or surpassed. Year 5 standards have already been achieved for percent vegetative cover and survival of both container plants and cuttings. Total percent vegetative cover in the wetland mitigation site is 100.9 percent with 92 percent . attributable to native plant species. The native cover is largely attributed to arroyo willow (Salix IasioIepis), tall cattail (Typha latifolia), California bulrush (Scirpus californicus), and black willow (Salix gooddingii). These species have readily colonized the wetland mitigation site. Nonnative weed populations have been controlled and only account for 8.8 percent of the total cover. For year 1 there are no success standards for tree heights; however, all container plants outlined as having success standards, narrow-leaved willow (Salix exigua), black willow, arroyo willow, and blue elderberry (Sambucus mexicana), have achieved or are close to achieving the height success standard for year 3. Approximately 92 percent of container plants and 94 percerit of cuttings are alive and healthy. Although percent vegetative cover is achieving the success standards outlined in the conceptual wetland mitigation plan, there are three areas in the wetland mitigation site, totaling approximately 0.05 acre that have little to no vegetative cover. This is due to high levels of salt, soil compaction, and higher topography that prevents water from accessing these areas. These areas are underneath Macario Bridge and at two separate locations on the revegetated access road. - - The following remedial measures are recommended for year 2 of the Cannon Road Extension Project Wetland Mitigation Site: Continue to control and remove target nonnative species, such as bristly ox-tongue (Picris eichiodes), pampas grass (Cortaderia selloana), and saltcedar (Tamarix sp.), which have the ability to out-compete desirable native species. 319721000-1007/3151-1202R158 Page 1 City of Carlsbad Cannon Road Extension Project 7 February 2003 Perform remedial hand seeding and hand ripping of soil in 0.05 acre underneath Macario Bridge and in two locations on the revegetated access road in the winter of 2003 with mugwort (Artemisia douglasiana), mulefat (Baccharis salicifolia), western ragweed (Ambrosia psiostachya), and yerba mansa (Anemopsis californica) from the project's seed mix. This measure should be implemented between January and February of 2003. Install 10 arroyo willow, 10 black willow, and 15 mulefat cuttings in the wetter portions of the revegetated access road and underneath the bridge. This measure should be implemented between January and February of 2003. Continue to irrigate all portions of the wetland mitigation site.. 1.0 INTRODUCTION This is the first annual monitoring report of the wetland mitigation monitoring program for the temporary wetland impacts associated with the construction of Reach 1 of the Cannon Road Extension Project. The wetland mitigation site for temporary impacts, under Macario Bridge, is located in Carlsbad, San Diego County, California (Figure 1.). The Cannon Road Extension Project consists of constructing a four-lane arterial road from Car Country Drive to El Camino Real. The project is broken into two parts: Reach 1 and Reach 2. This wetland mitigation program provides mitigation for temporary wetland impacts associated with the construction of Macario Bridge in Reach 1 of the Cannon Road Extension Project. Reach 2 of the Cannon Road Extension Project, which will not be discussed in this report, begins where Reach I meets . Faraday Avenue and extends east to El Camino Real (Figure 1). AMEC Earth & Environmental, Inc. (AMEC) is the biological consulting firm responsible for the 5-year monitoring of the wetland mitigation site. The project is authorized under U.S. Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers Permit Application No. 97-20130-TCD & 97-20131-TCD, City of Carlsbad (City), California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 & 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. 1.1 Project Location Reach 1 of the Cannon Road Extension Project and the wetland mitigation site associated with the construction of Reach 1 is located south of Agua Hedionda Lagoon between Interstate 5 and Faraday Avenue (Figure 2). Reach 1 extends from Car Country Drive onto the mesa above Agua Hedionda Lagoon and traverses Macario Canyon near its confluence with the lagoon basin. Reach 1 of Cannon Road crosses Macário Canyon on Macario Bridge and terminates on the eastern canyon rim. 1.2 Project History Installation of the wetland mitigation site began in January 2001 and was completed in March 2001. The 120-day maintenance period began in the end of March 2001 and ended in July 2001. Valley Crest was the landscape maintenance contractor during this time. 31972 1000-1007/315 1-1202R158 Page 2 LAKE POND 38A 0 Bonsl co GAS J eyCenter Vista Way WINDIALL LAKE r ALONE LAKE Hidden Meado4atRoute 78 L HUBBERT LAKE \4. j•' Oceanside TURNER LAKE Camp Pq let SoutR- - arronR BUENALA000NCALAVERAS LAKE ,j, - DIXON RE€EIOIR UA SOUIIRA5I San Marco S Carlsbad Lake-San Mar ondido SAN MAIOSLAKE <,,v —_r--. - - POND 9A ci SOUTHERLA Project Location BA1- o0' 78 SAN Encinita LA ,_ , G SA amorra 0Rar)o Santa Fe LAKE 'MONARESERVOIR 0 SAN EList' GOON LtJsARo,CRES. LAKE POWAY San Diego Country IIOFairbankg Rcb 0 Solaro ach5 / Poway SAN DI LAGOON 0 Mar LOS PEN79 G0ON MIRA1 AR09ERVOIR SAN VIC RVOIR EL CAPITA N Legend * Project Location Major Roads Umited Access Higwhay = Highway - Rivers = Lakes - II - H --- --------- - --•- - 11 'i•i - - SADIEGO 81, Map Notes Projection: Statepiane (Zone 6), NAD$3, Feet Base Data: N SANDAG - County Boundaries, Places SANDAG - Rivers, Lakes - Caltrans Data: W E Current & Futtire Freeways o - - —Miles s 0 1 2 3 4 -5 11JuANASI 1--- 1s14/cannon/arcmap/regional_location,mxd - in Bostoni Harbison Canyon POND 37A Creso PALO ranit-Iills LAKEMRRAY 0 *VOIR L0VEk$t E THELIX LAKE Ranch La Mesa 0 1 San Diego Casa de Oro-M6nt Helix Valley REWVOIR Jamul on GroveNSEN RESER IA La Presa SWEE VVAI onita - PPER OTAtRESERV0IR Chula Vista ' LOWERT V LOWER OT ES VOIR 94 11 'VAYRIVE, • achj Door, I • POND 366 Oil 01/02/03 Regional Location Map FIGURE ii I •••-- . i'f' *.I"r \ ;:r j. I4i - ' * f ; r.. ' L-fr. 4 r:9 : 41 L -el. . — - L — - - - Jd ) ' -- r j •'a c 4r, 14 91 07 A' :,!1 I4JPE 4... .. IL it- - r .. f :' .1• .t# , , ,u .ö.' \L "! ?7 g!i . 1; - I'1 r --- £DO@TrTr'rJXi1J 'sI. f (.t ____ \\\ r -: - low two io dr ex 10 Feet Map Notes -N SANDAG- 2000 2-foot resolution, 3-band, false color infra-red imagery It it I I 4L am City of Carlsbad Cannon Road Extension Project 7 February 2003 They performed the installation and 120-day maintenance of the wetland mitigation site under the direction of the consulting firm, Dudek and Associates (Dudek). The maintenance and monitoring period began in July 2001 following the inspection meeting on 23 July 2002. AMEC began monitoring the wetland mitigation site in August 2002 and Native Landscape, Inc., the landscape maintenance contractor, began maintenance of the wetland mitigation site at the same time. AMEC completed monthly horticultural monitoring visits and submitted letter reports to the City through year 1 and will continue to do so through yeartwo. Official project correspondence for the monitoring program is included at the end of this report (Appendix A). 1.3 Project Objectives A total of 2.58 acres of southern willow scrub and freshwater marsh were temporarily impacted during the construction of Macario Bridge. Of the 2.58 acres, approximately 0.68 acre was temporarily impacted during construction and another 1.9 acres were temporarily impacted during bridge construction and through the shading of native riparian vegetation under Macario Bridge. The wetland mitigation site consists of a revegetated access road, the area underneath Macario Bridge, and a revegetated slope in the northeastern portion of the wetland mitigation site. The goal of the wetland mitigation site is to restore the preexisting riparian and wetland habitat functions and values. The overstory of the restored habitat is to be dominated by willows (Salix sp.), mulefat (Baccharis salicifolia), and blue elderberry (Sambucus mexicana). The understory . is to be dominated by arrow weed (Pluchea sericea), California wild rose (Rosa californica), California blackberry (Rubus ursinus), Douglas mugwort (Artemisia douglasiana), San Diego sagewort (Artemisia pa/men), western ragweed (Ambrosia psiostachya), yerba mansa (Anemopsis cailfornica), Mexican rush (Juncus mexicanus), and evening primrose (Oenothera elata ssp. hirsutissima). Maintenance and monitoring of the mitigation is ongoing throughout each year of the project. Maintenance activities such as nonnative weed control occur at appropriate times of the year by the landscape maintenance contractor. Qualitative horticultural monitoring occurs 12 times a year on a monthly basis in years 1 and 2 and 8 times a year for years 3 through 5. Botanical monitoring occurs annually to quantitatively assess the wetland mitigation site status with the success standards. Remedial measures will be implemented in the fall or winter of each year or if a vegetation community is not satisfying interim performance goals and is considered to be deficient for achieving final success standards in year 5. Success standards for the wetland mitigation site are outlined in the conceptual wetland mitigation plan (Ogden 2000). The success standards for the wetland mitigation site are based on achieving specific percentages of native plant cover, container plant and cutting survival, and tree heights. The City will have achieved the goals outlined in the conceptual mitigation project when these success standards have been met for the wetland mitigation site. If the wetland mitigation site meets success standards before year 5 and all parties agree, early acceptance of the project may be granted. 319721000-1007/3151-1202R158 Page 5 City of Carlsbad Cannon Road Extension Project 7 February 2003 0 2.0 Success Standards Success standards are a set of yearly performance standards for evaluating the wetland mitigation site progress. These success standards will be evaluated to determine when to implement remedial measures to correct deficiencies in project progress. The qualitative horticultural monitoring data and quantitative botanical monitoring data collected will be analyzed against these success standards, which are outlined in Table 1. 3.0 HORTICULTURAL MONITORING AMEC personnel began monitoring the wetland mitigation site after restoration installation was complete and at the end of the plant establishment phase. In August 2001, AMEC began monthly visits to conduct horticultural monitoring as outlined in the mitigation plan (Ogden 2000). Horticultural monitoring at the wetland mitigation site included a qualitative assessment of the following parameters: irrigation, seedling establishment; container plant and cutting health, natural recruitment, nonnative plant populations, pests and diseases, destructive human uses, and wildlife habitat value. Monitoring also included photo documentation of the wetland mitigation site. Representative locations, identified in Figure 3, were chosen to provide photographic overview of wetland mitigation site progress over the 5-year maintenance and monitoring program. These photographs were taken in August 2001 when AMEC began monitoring the wetland mitigation 0 site and in October 2002 during botanical monitoring (Appendix B). The following section includes a discussion of each horticultural parameter followed by an overall assessment of the wetland mitigation site in relation to these horticultural parameters. 3.1 Horticultural Parameters 3.1.1 Seedling Establishment Seedling germination and establishment are based on a variety of factors, including seasonal rainfall, aspect, soil disturbance, proximity to nonnative invasive plant species, seed viability, and the timing of seeding. Evaluation of this parameter includes identifying seedlings of the species included in the native seed mix and following their growth and establishment. Establishment of seeded species, both with respect to diversity and density of individual species, has been good this year, taking into account the less than average seasonal rainfall. The wetland mitigation site has progressed favorably in year 1 with excellent native seedling establishment and recruitment (Appendix B, Figure B-i through B-8). The density of seedlings is high throughout the majority of the wetland mitigation site. The revegetated access road has a lower-seedling density than the rest of the wetland mitigation site, which is most likely due to the drier nature and higher topographic setting of this area. Nonnative and invasive species did not affect seedling establishment in year 1. 319721000-1007/3151-1202R158 Page 6 City of Carlsbad Cannon Road Extension Project 7 February 2003 Table I SUCCESS STANDARDS FOR THE CANNON ROAD WETLAND MITIGATION SITE Standard . Remedial Measure if Standard Not Met Year 50% visual ground cover Reseed/replant, substitutions possible Establishment of all species planted or seeded Reseed/replant, substitutions possible 90% healthy container plants Replace with same species/size 80% healthy cuttings Year 2 All trees of acceptable growth rate in height Mulch and/or fertilizer may be recommended by the restoration biologist 90% survival of tree container plants' - 80% survival of shrub container plants' Replant with same species/size 80% survival of cuttings 70% total visual ground cover for all species Additional deed or container plants as recommended combined3 by restoration biologist Years 3 through 5 Height standards met for all trees Replant or receive remedial measures Tree Height Standards2 YR.3 YR.4 Black willow (1 gallon) 8 10 12 Arroyo willow (1 gallon) 8 10 12 Narrow-leaved willow (1 gallon) 4 6 8 Blue elderberry (1 gallon) 4 5 6 90% survival of tree container plants' 80% survival of shrub container plants' Replant with same species/size 80% survival of cuttings 75% cover by all species in year 33 80% cover by all species in year 43 Additional seed or container plants as recommended by restoration biologist 90% cover by all species in year 53 Irrigation will gradually be withdrawn from the mitigation area during years 3 and 4. No further irrigation will be applied after year 4. For the project to be considered successful, plants must survive one full dry season without supplemental irrigation. At the discretion of the restoration biologist, dead container plants can be mitigated for by naturally invading seedlings, if such seedlings are within 5 feet of the original plants and of similar species or habitat value. All heights given in feet. Cover of freshwater marsh species is acceptable in place of southern willow scrub species. 319721000-1007/3151-1202R158 Page 7 £ / •:_________ Ilk Ilk ____ ___ .-*• ____ ••'•• :.+•••- - I _ 1 _ NO /1 q/ ;•4t$' j IAL a ,. 7 0 Ow Ilk e I a I Feet 00 50 0 Map Notes, false color infra-red irriageo ry 100 .200 :': I •.. J'IClfJm!. i fIuIii • . . lri1k.iiiiiiv. — - . : 0 - . . • . •1 lei S - City of Carlsbad Cannon Road Extension Project 7 February 2003 Six of the seven species in the seed mix, including western ragweed, yerba mansa, Douglas mugwort, San Diego sagewort, mulefat, and California evening primrose have established and Were detected on the site (Table 2). Mexican rush was not detected in the wetland mitigation site since it was not included in the seed mix. The success standard for year 1 states that establishment of all species seeded should occur for the success standard to be achieved. All species in the seed mix did establish in the wetland mitigation site in year 1 therefore obtaining the success standard for establishment of species from the seed mix. Table 2 SPECIES DETECTED FROM THE SEED MIX ON THE CANNON ROAD WETLAND MITIGATION SITE OCTOBER 2002 Scientific Name Common Name Detected within the Site Ambrosia psiostachya western ragweed X Anemopsis californica yerba mansa X Artemisia douglasiana Douglas mugwort X Artemisia pa/men San Diego sagewort X Bacchanis salicifolia mulefat X Juncus mexicanus Mexican rush Not planted Oenot here elate ssp. hirsutissima evening primrose X Nomenclature follows Hickman 1993 3.1.2 Container Plant and Cutting Health Container plant and cutting health are visually assessed for container plants and cuttings installed within the wetland mitigation site. If plants appear to be in poor health, remedial measures can be recommended. Dudek conducted a 120-day dead plant count in June 2001 and some dead container plants were replaced after this period. Approximately 1,074 one-gallon container plants and 513 cuttings were planted in the wetland mitigation site. These included 45 Fremont cottonwood (Populus fremontii), 100 narrow-leaved willow (Salix exigua), 158 black willow, 175 arroyo willow, 62 blue elderberry, 184 mulefat, 42 arrowweed, 140 California wild rose, and 168 California blackberry container plants as well as 258 mulefat and 255 arroyo willow cuttings. Throughout the first year, container plants andcuttings were assessed. Some of the container plants and cuttings were in poor health or had died. During October 2002, all container plants and cuttings were counted. Approximately 7 percent were in poor health or had died. Container plant mortality was highest for California wild rose and California blackberry. A significant lack of health was noted in these container plants and the Fremont' cottonwood container plants. The mortality and lack of health can be attributed to a high salt concentration in the soil in some portions of the wetland mitigation site and the direct sunlight and heat exposure. California wild 319721000-1007/3151-1202R158 Page 9 [I: City of Carlsbad Cannon Road Extension Project 7 February 2003 41' rose and California blackberry species cannot tolerate direct sunlight and prefer to be underneath older, mature riparian species. These two species are healthy where they occur underneath other vegetation in the wetland mitigation site. The Fremont cottonwood appear to have burned from the high salt concentration in some of the areas where this species was planted. Success standards for year 1 state that 90 percent of container plants are healthy and 80 percent of cuttings are healthy. Approximately 8 percent of container plants are dead, or 92 percent of container plants are: alive and healthy. Approximately 6 percent of cuttings are dead, or 94 percent of cuttings are alive and healthy. There is an overall 7 percent combined total of the container plants and cuttings that are dead or a 93 percent combined total of container plants and cuttings that are alive and healthy (Table 3). The container plant and cutting health success standards for year 1 have been achieved and surpassed. The container plant and cutting health success standards for year 5 now have been achieved. Table 3 CONTAINER PLANT AND CUTTING SURVIVAL FOR CANNON ROAD WETLAND MITIGATION SITE OCTOBER 2002 Scientific Name Common Name Container Type Number Planted Number Dead Percent Dead Baccharis salicifolia mulefat cuttings 258 13 5% Baccharis salicifolia mulefat 1-gallon 184 1 0.5% Plucheasericea arrowweed Liners* 42 0 0 Populus fremontll Fremont cottonwood 1-gallon 45 2 4% Rosa californica California wild rose 1-gallon 140 21 15% Rubus ursinus California blackberry 1-gallon 168 30 18% Salix exigua narrow-leaved willow 1-gallon 100 2 2% Salix gooddingii black willow 1-gallon 158 5 3% Salix lasiolepis arroyo willow cuttings 255 15 6% Salix lasiolepis arroyo willow 1-gallon 175 4 2% Sambucus mexicana blue elderberry 1-gallon 62 2 3% Unknown 1-gallon _LL _j_ Total 1,587 115 1 7% * Although 1-gallon plants were specified, liners were used and planted half way through the 120-day maintenance period because 1-gallon plants were not available at the time. 3.1.3 Natural Recruitment In addition to planting and seeding activities, plants establishing onsite can originate from several sources, including propagules that are transported to the site by wind, water, or animal vectors. Similarly, seeds may qlready occur in the soil prior to restoration activities. This natural recruitment plays an important role in increasing the diversity and density of native plant species within the restoration area. This is particularly true for this site where the mitigation project is surrounded by healthy, well-established upland and riparian native habitats that serve as potential source populations for incoming seed.. Evaluation of this parameter involves identifying germinating seedlings or volunteers that were not included in the seed mix. 319721000-1007/3151-1202R158 Page 10 City of Carlsbad Cannon Road Extension Project 7 February 2003 Natural recruitment can also occur when native species seeded or planted within an area seed on their own, thereby increasing the density of that particular species within the restoration area. A number of native annual and perennial species produced seed this year within the wetland mitigation site. This continuing input of native seed contributes to the recruitment of native plant species across the wetland mitigation site. A total of 60 plant species have been observed at the wetland mitigation site through year 1 (Table 4). This includes 40 native species of which' about half have colonized the site through natural recruitment. Species diversity is high for year 1 at the mitigation site and indicates the site, as a whole, is performing well. The high diversity can be attributed to several factors: the presence of three vegetation associations, freshwater marsh, southern willow scrub, and coastal sage scrub, on and surrounding the wetland mitigation site; seeds from container plants and cuttings; any seeds present in the soil; and seeds that are carried in from adjacent native habitats. Many obligate and facultative indicator wetland species not included in the seed mix, such as alkali bulrush (Scirpus maritimus), small-fruited bulrush (Scirpus microcarpus), California bulrush (Scirpus californicus), spike rush (Eleocharis sp.), cattail (Typha latifolia), salt marsh fleabane (Pluchea odorata), pickleweed (SalicOrnia virginica), southwestern spiny rush (Juncus acutus ssp. IeopoIdii), and fireweed (Epilobium diiatum spp. diiatum) are naturally establishing, providing seed, and contributing to native cover in the wetland mitigation site. Table 4 S SPECIES DETECTED AT THE CANNON ROAD WETLAND MITIGATION SITE July 2001 - October 2002 Scientific Name Common Name Ambrosia psilostachya* western ragweed Ana gal/is aivensis scarlet pimpernel Anemopsis californica* yerba mansa Apium graveolens wild celery Artemisia californica* California sagebrush Artemisia douglasiana* mugwort Artemisia palmeri* San Diego sagewort Atriplex semibaccata Australian saltbush Baccharis pi/ularis* coyote bush Baccharis salicifolia* mulefat Brassica nigra black mustard Centaurea me/itensis tocalote Chenopodium sp. pigweed Cortaderia selloana pampas grass Cotula coronopifolia African brass buttons Deinandra fasciculata* tarplant 319721000-1007/3151-1202R158 Page 11 11 S City of Carlsbad Cannon Road Extension Project 7 February 2003 Scientific Name Common Name Deinandra paniculata* tarplant Digitaria sanguinalis crab grass Eleocharis sp. spike rush Encelia californica* California encelia Epiobium ciliatum ssp. ciliatum* willow herb Eriophyllum con fertiflorurn* golden yarrow Foeniculum vu/gare wild fennel. Gnaphalium sp. everlasting Gnaphalium bicolor* cudweed Gnaphalium californicum* California everlasting Isocoma menziesii* . coastal goldenbush Juncus acutus ssp. IeopoIdil* southwestern spiny rush He/lotropium curassivicum* salt heliotrope Lythrum hyssopifolium* grass poly Marrubium vulgare horehound Me/lotus indica yellow sweet clover Nassella pulchra* purple needle grass Oenothera elafa ssp. hirsutissima* evening primrose Picris echioides . bristly ox-tongue Plantagosp.* plantain Pluchea odorata* saltmarsh fleabane Pluchea sericea* . arrowweed Polypogon monspeliensis . rabbitfoot grass Populus fremontll* Fremont cottonwood Ricinus communis castor bean Rorippa nasturtiumaquaticum* water cress Rosa californica* California wild rose Rubus ursinus* California blackberry Rumex crispus curly dock Salicornia virginica* . pickleweed Sa/ix exigua* narrow-leaved willow Salix gooddingii* black willow Salix lasiolepis* arroyo willow 319721000-1007/3151-1202R158 Page 12 City of Carlsbad Cannon Road Extension Project 7 February 2003 Scientific Name Common Name Salsola tragus Russian thistle Sambucus mexicana* Mexican elderberry Scirpus ca!ifornicust 0 California bulrush Scirpus maritimus* alkali bulrush Scirpus microcarpus* small-fruited bulrush Solanum xantr purple nightshade Sonchus asper prickly sow thistle Sonchus oleraceus common sow thistle Tamarix sp. saltcedar Typha !atifolia* tall cattail Xanthium strumarium* cocklebur Nomenclature follows Hickman 1993 *Denotes plant species native to southern California. 3.1.4 Irrigation Irrigation is often supplied to restoration sites to encourage establishment and; growth of vegetation and to ensure survival of established seedlings and cuttings. Irrigation is usually supplied to a site during the first 2 to 3 years and sometimes continues into the fourth or fifth year depending on the vegetative establishment and success at the site. Supplemental irrigation can also be manually manipulated to mimic the natural climatic conditions of the area that is being restored. To promote deep root growth of vegetation at the wetland mitigation site, the irrigation schedule for the revegetated access road and slope adjacent to the concrete lined drainage ditch were manipulated once during the year. Supplemental irrigation helped the wetland mitigation site establish and thrive during year 1. 3.1.5 Nonnative Plant Populations Control of nonnative plant populations is one of the most important factors in the success of any restoration project because invasive and nonnative plants prevent the establishment of native species by competing with them for important resources (Bossard et al. 2000). Maintenance weeding concentrated on invasive weed species, such as bristly ox-tongue (Picris echioides), wild fennel (Foeniculum vulgare), pampas grass (Cortaderia selloana), and saltcedar (Tamarix sp.), which pose a threat to native plant establishment. Several nonnative plant species, such as rabbitfoot grass (Polypogon monspeliensis) and African brass buttons (Cotula coronopifolia), which are not considered invasive, Were left in the wetland mitigation site. It was assumed, based on past-experience, that these two species would not compete with the native riparian species in the wetland mitigation site and that, over time, they would not be a major component in the wetland mitigation site. Maintenance weeding was completed with manual and mechanical techniques, and herbicides were applied where deemed effective in the wetland mitigation site. O 0 319721000-1007/3151-1202R158 Page 13 City of Carlsbad Cannon Road Extension Project 7 February 2003 Bristly ox-tongue, pampas grass, and saltcedar were all located at the wetland mitigation site during year 1. The bristly ox-tongue had gone to seed and the remaining bristly ox-tongue, pampas grass, and saltcedar plants were hand pulled or sprayed with herbicide. These species are not anticipated to become a significant problem at the wetland mitigation site as long as weeding continues to occur regularly. 3.1.6 Destructive Human Uses During the fall and winter of 2001, bicycle and motorcycle tracks were observed on a monthly basis in the wetland mitigation site. These motorized and nonmotorized vehicle users were creating trails in the wetland mitigation site thereby injuring or killing the vegetation adjacent to these trails. These trails were created because the vegetation in the wetland mitigation site had not matured enough to prevent the vehicles from entering the wetland mitigation site. As time passed, the vegetation matured, and these destructive uses decreased and, as the vegetation continues to mature, it is anticipated that these uses will cease all together. In May 2001, a homeless encampment had been established in the southern portion of the wetland mitigation site. Trash began to accumulate around the encampment and in the wetland mitigation site. Plants in the wetland mitigation site were being damaged or killed by harvesting and trampling. The City sent a representative to the homeless encampment several times to inform the inhabitant(s) to vacate the wetland mitigation site. Although destructive human uses in the wetland mitigation site have been identified, it is not anticipated that they will become issues since the vegetation will continue to grow thereby excluding motorized and nonmotorized vehicle use. The motorcycle use in the wetland mitigation site has completely discontinued and the bicycle use is minimal. The homeless encampment was vacated sometime in October 2002 after the City placed two notices to vacate the premises in the vicinity of the homeless encampment. AMEC continues to monitor the wetland mitigation site for new encampments and none currently occur on the site. 3.1.7 Pests and Diseases A number of animal or insect species can become pests within restoration sites if their populations are not controlled or measures are not initiated to reduce their effect. Similarly, some plant diseases can have a devastating effect if the symptoms are not identified early and remedial actions are not employed. Many of the pests and diseases observed in restoration sites are naturally occurring and are often seasonally fluctuating events. A proactive management program identifies and evaluates these issues, providing remedial measures when site success is jeopardized. Pests were a slight problem for the wetland mitigation site in year 1. Rabbits and gophers utilize the wetland mitigation site and these small mammals chewed the bases of several species in the wetland mitigation site, causing some of them to die. These mammals tended to favor narrow-leaved willow seedlings, saplings, and cuttings. 319721000-1007/3151-1202R158 Page 14 Q City of Carlsbad Cannon Road Extension Project 7 February ?003 Two diseases, sooty mold and powdery mildew, were located on Douglas mugwort and western ragweed in a small area in the southwestern portion of the wetland mitigation site. Sooty mold is a black fungus that appears as a black Coating on the leaves and stems of plants. Sooty mold can only take hold of plants that have secretions of honeydew on the leaves and stems from insects such as aphids, whiteflies, and scales. This honeydew is where the sooty mold obtains nourishment. Sooty mold can be controlled once the insect responsible for the honeydew secretions is identified. Sooty mold can kill a plant in extreme cases. Powdery mildew is a white, patchy fungus that coats the leaves of some plants. It occurs on plants in areas with high relative humidity or site conditions that promote these conditions such as close spacing of plants, densely growing plants, or shade. Powdery mildew can kill a plant in extreme cases (Jett 2002; Cornell University 2002). Although pests and diseases have been identified in the wetland mitigation site, no corrective actions are recommended. AMEC will continue to monitor the small mammal herbivory, sooty mold, and powdery mildew to see if they become significant issues. 3.1.8 Wildlife Habitat Value Although the wetland mitigation site is only 2 years old, the vegetative cover, diversity, and structure are typical of a mid-successional phase of freshwater marsh and southern willow scrub vegetation communities. The overall wildlife habitat quality of the wetland mitigation site is moderate for open-habitat specialists and moderate to high for more closed-habitat specialists at this time. The wetland mitigation site cover ranges from relatively open on the revegetated access road to closed in the middle portion under the Macario Bridge. Common wildlife species utilizing the mitigation site include pacific treefrog (Hyla regilla), lesser goldfinch (Carduelis psaltria), mourning dove (Zenaida macroura), black phoebe (Sayornis nigricans), mice (Chaetodipus sp.), coyote (Canis latrans), and bobcat (Fe/is rufus). Several sensitive wildlife species have also been utilizing the mitigation site including coastal California gnatcatcher (Polioptila californica californica), white tailed kite (Elanus leucurus majusculus), red-tailed hawk (Buteojamaicensis), and northern harrier (Circus cyaneus). Potentially suitable habitat exists for southwestern willow flycatcher (Empidonax trail/ii extimus), light-footed clapper rail (Rallus Ion girostris levipes), and least Bell's vireo (Vireo be/Ill pusilus). Least Bell's vireo have been documented as nesting in Macario Canyon for the past several years (Ogden 2000) but have not been identified in the wetland mitigation site. 4.0 BOTANICAL MONITORING The line intercept method was utilized to collect the absolute percent cover of plant species in the wetland mitigation area and tree heights were collected within belt transects established as part of the line intercept method. The quantitative data were used to evaluate the performance of the wetland mitigation site in terms of the project success standards. For year 1 the establishment of the line intercept method and the measurement of tree heights was not required. However, since the wetland mitigation site was performing exceptionally well in 31972 1000-1007/3 15 1-1202R158 Page 15 City of Carlsbad Cannon Road Extension Project 7 February 2003 respect to species cover and tree heights for year 1 of the project, AMEC' decided to employ the line intercept method and to measure tree heights. 4.1 Monitoring Methods Botanical data were collected on 22 and 23 October 2002. Six 30-meter belt transects were randomly established in the wetland mitigation site to ensure that even sampling of the entire wetland mitigation site occurred (Figure 4). These belt transects were 3 meters wide. Transect location was determined by randomly choosing a number on the x- and y-axis for the beginning of each transect. Transects one and two are located on the revegetated access road. Transects three through six are located in the wetland mitigation site underneath and adjacent to Macario Bridge. Transects three and four are on the east side of the wetland mitigation site. Transects five and six are on the west side of the wetland mitigation site. To ensure transects can be located in future years, the transect beginning and ends were marked with 5-foot PVC pipe and labeled using pink flagging. The endpoints of each transect were also, marked using PVC pipe and pink flagging. Documentary photographs were taken from the beginning of each transect facing in the direction in which the data.were collected (Appendix C). AMEC used the line intercept method to measure absolute percent cover of all plant species encountered. The amount of each species intersecting the transect was recorded directly into a palm top computer. All plant species were identified to genus and species when possible. Absolute percent cover was calculated for the transects. Absolute cover measures the canopy cover of all layers of vegetation, taking into account the overlapping characteristics of many herbs, shrubs, and trees. Bare ground and litter were also recorded. Absolute percent cover will be referred to as percent cover for the remainder of this report. The data were analyzed to provide total cover of native and nonnativë species, including a breakdown by each species. Raw botanical data are included in Appendix D. Belt transects were established on the same measuring tape used to collect percent cover. Three meters were measured on the east side of the tape to create the belt transects on transects 1 and 2 and on the north side for transects 3 through 6. All belt transects were 30 meters in length. All container trees within the belt transect were measured in meters using a tree height measurement device. Pink flagging was tied onto each tree that was measured so that the same trees can be measured again. The tree height data were analyzed to calculate average height. 4.2 'Analysis of Botanical Monitoring 4.2.1 Percent Cover Total percent cover in the wetland mitigation site is 100.9 percent with 92 percent attributable to native plant species (Table 5). Total percent cover for the wetland mitigation site is performing above the year 5 success standard of 90 percent cover (Table 1). The native cover is largely attributed to arroyo willow, tall cattail, California bulrush, and black willow. These species have 319721000-1007/3151-1202R158 Page 16 . .. , . •f : Li • 4 I • - - le S. S .; .•'; -' S. J..• - . - -:: • , 14 I 't it b ___________ i._..__• I AA Is Legend 100 50 0 200 Photo Locations Map Notes 30-Meter Transects SANDAC, 2000 2-foot resolution, 3-band, jalse color infra-red imgery Mitigation Site iA fie S 5. . I I.I - - S •. I A - - - City of Carlsbad Cannon Road Extension Project 7 February 2003 Table 5 PLANT SPECIES COVER OF THE CANNON ROAD WETLAND MITIGATION SITE OCTOBER 2002 Scientific Name Common Name Absolute Cover (%) Salix lasiolepis * arroyo willow 20.1 Typha latifolia * tall cattail 12.1 Scirpus californicus * California bulrush 10.3 Salix gooddingii * black willow 8.3 Pluchea odorata * salt marsh fleabane 7.6 Scirpus robustus * prairie bulrush 7.4 Baccharis salicifolia * mulefat 6.7 Polypogon monospeliensis S rabbitfoot grass 6.5 Artemisia douglasiana * California mugwort 6.3 Oenethera elata ssp. hirsutissima * evening primrose 2.7 Ambrosia psilostachya * western ragweed 2.5 Picris echioides bristly ox-tongue 2.3 Anemopsis californica * yerba mansa 1.8 Salix exigua * narrow-leaved willow 1.6 Rubus ursinus * California blackberry 1.6 Eleocharis sp. * spike-rush 1.3 Scirpus microcarpus * small-fruited bulrush 0.7 Heliotropium curassavicum * salt heliotrope 0.5 Artemisia palmeri San Diego sagewort 0.4 Juncus acutus ssp. leopoldii * southwestern spiny rush 0.1 Epilobium diiatum * willow herb 0.03 Salicornia virginica * pickleweed 0.01 Baccharis pilularis * coyote bush 0.01 Percent Total Cover 100.9 Percent Native Cover * 92.0 Percent Nonnative Cover 8.8 readily Colonized the wetland mitigation site. Nonnative weed populations have been controlled and only account for 8.8 percent of the total cover. The majority of the nonnative cover (6.5 percent) is attributable to rabbitfoot grass, a noninvasive, nonnative species. Although the success standard for percent cover outlined in the conceptual wetland mitigation plan has been achieved, there are three areas in the wetland mitigation site that have little to no vegetative cover. This is due primarily to the high levels of salt, soil compaction, and higher 319721000-1007/3151-1202R158 Page 18 C City of Carlsbad Cannon Road Extension Project 7 February 2003 topography that prevents water from accessing these areas. The three areas that have little to no vegetative cover are underneath Macario Bridge and two separate locations on the revegetated access road totaling 0.05 acre. 4.2.2 Tree Heights Average heights for container plants and cuttings are presented in Table 6. Average height for planted mulefat container plants is 6.0 feet. Average height of narrow-leaved willow container plants is 7.5 feet. Average height of black willow container plants is 9.0 feet. Average height of arroyo willow container plants is 9.0 feet. Average height for Fremont cottonwood container plants is 6.3 feet. Averge height of blue elderberry is 4.0 feet. For year 1 there are no success standards for tree heights; however, all container plants outlined as having success standards (narrow-leaved willow, black willow, arroyo willow, and blue elderberry) have achieved or are close to achieving the height success standard for year 3 (Table 1). Fremont cottonwood and mulefat container plants do not have tree height success standards associated with them. Table 6 AVERAGE HEIGHTS OF CONTAINER PLANTS FOR THE CANNON ROAD WETLAND MITIGATION SITE OCTOBER 2002 Scientific Name Common Name Average Height Sample Size (feet) Baccharis salicifolia mulefat 6.0 25 Salix exigua narrow-leaved willow 7.5 12 Salix gooddingii black willow 9.0 18 Salix lasiolepis arroyo willow 9.0 25 Populus fremonfii Fremont cottonwood 6.3 8 Sambucus mexicana blue elderberry 4.0 5 5.0 EVALUATION OF RESTORATION SUCCESS AND RECOMMENDATIONS 5.1 Evaluation of Restoration Success Vegetation has established well throughout the wetland mitigation site. Adequate seed establishment, natural recruitment, and water flow over the wetland mitigation site have all contributed to this site's success. Many volunteer species are also filling in the wetland mitigation site. The wetland mitigation site is expected to continue to meet year 5 success standards provided that the remedial measures outlined below are followed. 5.2 Recommendations for Year 2 The following remedial measures are recommended for year 2 of the Cannon Road Extension Project Wetland Mitigation Site 319721000-1007/3151-1202R158 Page 19 City of Carlsbad Cannon Road Extension Project 7 February 2003 Continue to control and remove target nonnative species, such as bristly ox-tongue, pampas grass, and saitcedar, which have the ability to out-compete desirable native species. Perform remedial hand seeding and hand ripping of soil in 0.05 acre underneath Macario Bridge and in two locations on the revegetated access road in the winter of 2003 with mugwort, mulefat, western ragweed, and yerba mansa from the project's seed mix. This measure should be implemented between January and February of 2003. . Install 10 arroyo willow, 10 black willow, and 15 mulefat cuttings in the wetter portions of the revegetated access road and underneath the bridge. This measure should be implemented between January and February of 2003. Continue to irrigate all portions of the wetland mitigation site. S 319721000-1007/3151-1202R158 Page 20 City of Carlsbad Cannon Road Extension Project 7 February 2003 0 6.0 REFERENCES Bossard, C.C., J.M. Randall, and M.C. Hoshovsky, editors. 2000. Invasive Plants of California's Wildlands. University of California Press, Berkeley, California. Cornell University. Plant Diagnostic Clinic. 1999. Retrieved from http://plantclinic.cornell.edu/FactSheets/ on December 10, 2002. Hickman, J.C. 1993. The Jepson Manual: Higher Plants of California. University of California Press, Berkeley, California. 1400 pp. Jett, Susan. Personal Communication. Rancho Santa Ana Botanical Garden Horticulturalist.10 December 2002. Ogden Environmental and Energy ServicesCo., Inc. 2000. Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California. July. S 319721000-1007/3151-1202R158 Page 21 APPENDIX A CORRESPONDENCE fl LI ameO,- 01-140-3151 23 July 2001 Sherri Howard City of Carlsbad Public Works and Engineering 1635 Faraday-Avenue Carlsbad, California 92008 Subject: Cannon Road Macario Bridge Mitigation Meeting Dear Ms Howard: AMEC Earth & Environmental (AMEC) is writing this letter to summarize the meeting on July 23, 2001 between the City of Carlsbad (the City), AMEC, Dudek and Associates (Dudek), Native Landscape, and Valley Crest personnel at the Cannon Road Macario Bridge mitigation site. AMEC will begin the monitoring portion of the mitigation site once Valley Crest completes the maintenance of the site agreed upon in their contract. Valley Crest shall weed all mitigation areas and adjust the sprinkler heads on the northern slopes of the mitigation area before AMEC begins monitoring the site. Valley Crest shall eradicate all of the below listed weedy species using manual and/or mechanical means and/or by applying herbicide, before AMEC assumes responsibility for the site. The City, Dudek, and AMEC also agreed that the two non-native species, pimpernel (Anagallis arvenis) and. rabbit foot grass (Polypogon monspeliensis), remain. present within the site, since they are not noxious or invasive, and do not comprise the majority of the plant species on site. AMEC, Dudek, and the City also agreed that the northern mitigation "toe slope" area, which was part of the previously disturbed area, remain excluded from weeding, as it has not been weeded in the past and does not contain any noxious or invasive species. Restoration and maintenance has also been applied to the slope just south of this "toe slope" as a compromise for the natural and unassisted restoration of the original "toe slope". Species to be removed manually, mechanically, or through the use of herbicide: Apiaceae (Carrot Family) fennel Foeniculum vuigare Asteraceae (Sunflower Family) sow thistle Sonchus asper cocklebur . Xanthium strumarium Brassicaceae (Mustard Family) mustard Brassica nigra, Hirsch feldia incana wild radish Raphanus sativus Chenopodeaceae (Goosefoot Family) Russian thistle Salsola sp. AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel 858458-9044 Fax 858-458-0943 www.amec.com Ms. Sherri Howard 23 July 2001 ameO Page 2 Euphorbiaceae (Spurge Family) castor bean Pkinus communis Fabaceae (Pea Family) sweet clover Melilotus albus, M. indicus Poaceae (Grass Family) pampus grass Cortaderia jubata, C. seioana Bermuda grass Cynodondactylon Polyqonaceae (Buckwheat Family) curly dock Rurnex crispus knotweed Polygonum arenastrum Solanaceae (Nightshade Family) jimson weed Datura wrightii Tamaricaceae (Tamarisk Family) saltcedar Tarnarix sp. AMEC anticipates this maintenance work to occur the week of July 232001 and another field meeting will occur on Tuesday, July 31, 2001. Please call if you have any concerns or questions. Sincerely, Jessie Walker Botanist AMEC Earth and Environmental JW/css cc: File Contracts 3-1972-1000 ameO 01-159-3151 August 30, 2001 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Monthly Horticultural Monitoring Report for August 2001 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits this monthly horticultural monitoring letter report for the temporary wetland impacts of the Cannon Road extension project (Macario Bridge), to the City of Carlsbad, California for your records. This report covers the month of August 2001. The project has permits with the United States Fish and.Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers Permit Application No. 97-20130-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97; CDFG California Incidental Take Permit - Permit No. 2081-1998-05-5; and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for'Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to The City of Carlsbad and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape). On August 17, 2001 AMEC performed the first monthly-site survey for year one of five for the Cannon Road Macario Bridge Wetland area horticUltural monitoring program. The site was seeded and container plants were planted after construction was completed in late March-early April. During the site survey AMEC met with the landscape maintenance contractor, Debbie Fromme of Native Landscape to assess the condition of the site, and to establish six permanent photo points (Figures 1 a-6). Although the permanent photos are related to the botanical monitoring component of the mitigation plan, they were established as soon as possible to qualitatively capture the maximum vegetative growth over time at the site. This letter covers irrigation system AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel 858-458-9044 Fax 858-458-0943 www.amec.com Ms. Sherri Howard August 30, 2001 Page 2 ameO maintenance, weed control, live and dead plant conditions, and off-highway vehicle (OHV) use at the site. A list of plant-species presently occurring on site was compiled during this visit (table 1). The wetland mitigation area is progressing favorably at this time. The irrigation system is supplying adequate levels of water to all areas of the mitigation site. One sprinkler (valve 5A) was shut down due to excessive leaking a few days earlier and it will be necessary to raise two other sprinklers above the vegetation. A small area under the bridge appears to be over saturated with standing pools of water, and moss was forming over the exposed soil surface. ,Native Landscape informed AMEC that this is a natural condition and that it looked similar before construction began. Therefore no corrective, action will be taken at this time unless a problem develops. Weeds are not a problem on site at this time. Weed control is occurring regularly for invasive species such as crab grass (Digitaria sp.), tamarisk (Tamarixsp.), fennel (Foeniculum vulgare), and castor bean (Ricinus communis). Non-native species that are not considered noxious/invasive, such as pimpernel (Ana gall/s arvensis), salt heliotrope (Heliotropium curassivicum), and rabbit's foot grass (Polypogon monspeliensis) are not being weeded at this time, but it is unlikely that these species will be a problem due to their inability to compete with the native species that are already established at the site. The majority of the container plants are alive and vigorous at the site and there is an abundance of seeded and volunteer riparian species occurring throughout the site. However, there are two potential issues at the site. A few willow plants appeared unhealthy and/or were infested with aphids, but were still alive. We do not recommend replacement at this time. Approximately four blackberry shrubs (Rubus ursinus) and California rose shrubs (Rosa caifornica) appeared dead in areas of high soil alkalinity. At this time there is no plan to replace these shrubs, since they are not suited to survive in alkaline soils. Pickleweed (Salicornia virginica), a species that does well in alkaline soils, is naturally colonizing these areas. Planting of suitable species will occur-in the alkaline areas, if appropriate and effective ground cover does not colonize naturally over time. OHV (motorcycle) tracks and a slight trail were observed on the replanted "access road". The motorcycle crushed some willow container plants and some of the wetland emergent vegetation along the access road It appeaIs over time, the vegetation along the access road will grow high and thick enough to prevent motorcyclists from using this road. Monitoring of the access road and motorcycle use will continue and corrective actions may need to be taken if the problem continues. Ms. Sherri Howard August 30, 2001 Page 3 ameO AMEC will continue monthly horticUltural monitoring visits and submit monthly progress reports in accordance with the project's. permits and agreements. Please call me at (858) 458-9044, extension 264, or e-mail me at jessica.walker@amec.com, if you have any questions. Sincerely, Jessie Walker Botanist JW/css .. cc: Debbie Fromme; Native Landscape, Inc. File Contract 3-1972-1000-1007 9 Ll ameO TABLE 1 CANNON ROAD MACARIO BRIDGE WETLAND MITIGATION SITE FLORAL SPECIES LIST August 2001 Ana gal/is aivensis primrose Apium graveo/ens celery Ambrosia psiostachya - western ragweed Artemisia douglasiana mugwort Baccharis pilularis coyote bush Baccharis salicifo/ia mulefat Chamaesyce polycarpa fairy mats Chenopodium album pigweed Cotula coronopifolia African brass buttons Cyperus sp. nutsedge Digitaria sp. crab grass Heliotropium curassavicum salt heliotrope Me/lotus indicus yellow sweet clover Oenothera elata - evening primrose Picris echioides bristly ox-tongue P/antagosp. plantain Pluchea purpurascens salt marsh fleabane Polypogon monspe/iensis S rabbit's foot grass Populus fremontii Fremont cottonwood Ricinus communis castor bean Rorippa nasturtium-a quaticum water cress Rosa californica .California wild rose Rubus ursinus California blackberry Scirpus acutus common tule Scirpus californicus California bulrush Salicornia virginica - pickleweed Salix goodingii black willow Salix lasiolepis S arroyo willow Sambucus mexicana S • Mexican elderberry Sonchas asper • S S • prickly sow thistle Tamafix sp. tamarisk Washingtonia filifera fan palm •.•• ( -. . jjjPI; It. .i.L!• ;.,c 11 Road Widening Project Cannon Road Road Widening Project FIGURE V 1c-2 ameO I Biology/Cannon Road Permits/Photos 3_4.FH8 W T..! •1 . - - --?--;I:c -_$ j NI I a a r — - IN -F - --..- -! .: S - - - S. . . .-.'. ••..i••. i'•/- . 'tI - . ,-._-- -..--..- ...-...... .---:..- ••:-. - j - .- S i'I - ---,.. - - .-.--- - - - q14 .... -. •. •' •- Road Widening Project I 01-179-3151 amet--.,, September 26, 2001 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Monthly Horticultural Monitoring Report for September 2001 - Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits this second monthly horticultural monitoring letter report for the temporary wetland impacts of the Cannon Road extension project (Macario Bridge), to the City of Carlsbad, California for your records. This report covers the month of September 2001. The project has permits with the United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); U.S. ArmyCorps of Engineers Permit Application No. 97-20130-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97; CDFG California Incidental Take Permit - Permit No. 2081-1998-05-5; and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to The City of Carlsbad and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape). On September 14, 2001 AMEC performed the second monthly site survey for year one of five for the Cannon Road Macario Bridge wetland area horticultural monitoring program. During the site survey, AMEC met with the landscape maintenance contractor, Debbie Fromme of Native Landscape to assess the condition of the site. This letter covers irrigation., system maintenance, weed control, live and dead plant conditions, and off-highway vehicle (OHV) use at the site. The wetland mitigation area is progressing favorably and as expected at this time. The irrigation system is supplying adequate levels of water to most areas of the mitigation site. During the site visit it was recommended that four sprinklers at the site be raised above wetland vegetation which is growing taller than the sprinklers thereby preventing water from reaching dryer portions of the site. Weeds are not a problem on site at this time. Weed control is occurring regularly (every ten days) for invasive species such as crab grass (Digitaria sp.), tamarisk (Tama rixsp.), fennel (Foeniculum vulgare), and castor bean (Ricinus communis). Non-native species AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel 858458-9044 Fax 858-458-0943 Www.amec.com September 26, 2001 ame& Ms. Sherri Howard Page2 that are not considered noxious/invasive, such as pimpernel (Anagallis arvensis), salt heliotrope (Heliotropium curassivicum), and rabbit's foot grass (Polypogon monspeliensis) are not being weeded-at this time and are not a problem at the site. All of the container plants are-alive and vigorous at the site and there is an abundance of seeded and volunteer riparian species occurring throughout the site. The species that appeared unhealthy during the last site visit either from high salinity levels (Rosa californica and Rubus ursinus) and/or insect infestations (Salk sp.) appear healthier at this time. AMEC and Native Landscape will continue to watch these species and corrective action will be taken if necessary. The off-highway vehicle (OHV) tracks from the last yvisit were not evident during this site visit. It appears that the volunteer species and all container plants at the site are colonizing the area thereby preventing OHV's from using the site. AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports in accordance with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or e-mail me atjessica.walkec@amec.com, if you have any questions. Sincerely, S Jessie Walker Botanist JW/css cc: Debbie Fromme; Native Landscape, Inc. File Contracts 3-1972-1000-1007-3151 0 S ameO- 01-195-3151 November 1, 2001 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 FILE COPY Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Monthly Horticultural Monitoring Report and Triannual Formal Field Meeting for October 2001 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits this third monthly horticultural monitoring letter report for the temporary wetland impacts of the Cannon Road extension project (Macario Bridge), to the City of Carlsbad (The City), California for your records. This report covers the month of October 2001. The project has permits with the United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers Permit Application No. 97-20130-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97; CDFG California Incidental Take. Permit - Permit No. 2081-1998-05-5; and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to The City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape). On 19 October 2001 AMEC performed the third monthly site survey for year one of five for the Cannon Road Macario Bridge wetland area horticultural monitoring program. The triannual formal field meeting with The City also took place on the same thy. During the site visit, AMEC, The City, and the landscape maintenance contractors, Debbie Fromme and Mark Girard of Native Landscape, met to assess the condition of the site. This letter covers irrigation system maintenance, weed control, health of wetland vegetation, and off-highway vehicle (OHV) use at the site. The wetland mitigation area is progressing favorably and as expected at this time. The irrigation system is supplying adequate levels of water to all areas of the mitigation site. During the month of October, Native Landscape raised most of the sprinklers at the site. The sprinklers were raised above the wetland vegetation, which was growing taller than the sprinklers thereby preventing water from reaching the dryer portions of the site. AMEC Earth & EnviroimentaI, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel 858-458-9044 Fax 858-458-0943 www.amec.com Ms. Sherri Howard November 1, 2001 Page 2 ameO Weeds are not a problem on site at this time. Weed control is occurring regularly (every ten days) for invasive species such as tamarisk (Tamarix sp.), fennel (Foeniculum vulgare), and castor bean (Ricinus communis). Non-native species that are not considered noxious/invasive, such as pimpernel (Anagalils arvensis), salt heliotrope (Heliotropium curassivicum), and rabbits foot grass (Polypogon monspeliensis) are not being weeded at this time and are not a problem at the site since the desirable wetland vegetation appears to be out-competing these non-native species. All of the container plants are alive and vigorous at the site and there is an abundance of seeded and volunteer ripariàn species throughout the site. The wetland species on site appear healthy and vigorous at this time. The off-highway vehicle (OHV) tracks were evident again during this site visit. It is anticipated that over time the volunteer plant species and all container plants at the site will colonize the area thereby preventing. OHV's from using the site. AMEC and Native Landscape will continue to monitor the on-site OHV use and corrective action will be taken if it continues and/or appears to be compromising the success of the site. AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports in accordance with the projects permits and agreemeiits. Please call me at (858) 458-9044, extension 264, or e-mail me at jessica.walker@amec.com, if you have any questions. Sincerely, Jessie Walker Botanist JWIks cc: Debbie Fromme - Native Landscape, Inc. File Contracts 319721000-1007-3151 ameo 01-201-3151 November 30, 2001 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project S (Macario Bridge) Monthly Horticultural Monitoring Report for November 2001 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits this fourth monthly horticultural monitoring letter report for the restoration of temporary wetland impacts of the Cannon Road extension project (Macario Bridge), to the City of Carlsbad, California for your records. This report covers, the month of November 2001. The project has the United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers Permit Application No. S .97-20130-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97; CDFG California Incidental Take Permit - Permit No. 2081-1998-05-5; and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to The City of Carlsbad and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape). On 21 November 2001 AMEC performed the fourth monthly site survey for year one of five for the Cannon Road Macario Bridge wetland area horticultural monitoring program. During the site survey, AMEC biologist, Jessica Walker, met with the landscape maintenance contractor, Debbie Fromme of Native Landscape to assess the condition of the site. This letter covers irrigation system maintenance, weed control, health of wetland vegetation, and off-highway vehicle (OHV) use at the site. The site is presently being watered once a day on Monday, Wednesday, and Friday. However, water is also entering the site from an area that is upstream from the mitigation site. Standing puddles of water and saturated soils were observed throughout most of the site during the site visit due to the excess amount of water. It was determined that Native Landscape would turn off the water at the site due to the excess amount of water being supplied at this time. AMEC and Native Landscape will continue to monitor the site to determine when the irrigation system will need to be turned on. S AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel 858458-9044 Fax 858-458-0943 www.amec.com Ms. Sherri Howard November 30, 2001 Page 2 afpnec,9 Weeds are not a problem on site at this time since weed control is occurring regularly (every ten days) for invasive species. During the site visit African brass buttons (CoW/a coronopifolia), a non-native perennial plant that occurs in wet areas, appeared to be colonizing a good portion of the reclaimed access road due to the favorable site conditions (wet, saturated soil). This plant is not considered noxious or invasive, and therefore had not been controlled at this site. Irrigation of the site has ceased which may help to slow down the spread of this plant species. Hand pulling will occur if this species appears to be a problem at the site in the future. All of the container plants are alive and vigorous at the site and there is an abundance of seeded and volunteer riparian species occurring throughout the site. The off-highway vehicle .(OHV) tracks from the last visit were not evident during this site visit. It appears that the volunteer species and all container plants at the site are colonizing the area thereby discouraging OH V's from using the site. AMEC will continue monthly horticultural monoring visits and submit monthly progress reports in accordance with the project's permits and agreements. Please call me at (858) 458-904.4, extension 264, or e-mail me atjessica.walker@amec.com, if you have any questions. Sincerely, Jessie Walker Botanist JW/css cc: Debbie Fromme; Native Landscape, Inc.. File Contracts 3-1972-1000-1007-3151 9- ameO 02-015-3,151 January 1:5, 2002 Ms. Sheri Howard • Project Manager City of Carlsbad. Engineeing Department 1635 Faraday Avenue Carlsbad, California 92008 Subject Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Monthly Horticultural Monitoring Report for December 2001 Dear Ms, Howard: AMEC Earth &.Environmental (AMEC) submits this fifth monthly horticultural monitoring letter report for the restoration of temporary wetland impacts of the Cannon Road extensioni project (Macario Bridge), to the City of Carlsbad, California for your records. This report covers the month of December 2001. The project has the United States Fish and Wildlife Service, Biolqgical Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers Permit Application No. 97-2013-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish . and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97; CDFG Californi Incidental Take Permit - Permit No. 2081-1998-05-5; and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Rçad Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City of Carlsbad and the landscape. maintenance contractor, Native Landscape, Inc. (Native Landscape). On 26 December 2001 AMEC performed the fifth monthly site survey for year one of five for the Cannon Road Macario Bridge wetland area horticultural monitoring program;. During the site survey, AMEC biologist, Jessica Walker, met with the landscape maintenance contractor, Debbie Fromme of Native Landscape to assess the condition of the site. This letter covers irrigation system maintenance, weed control, health of wetland vegetation, and off-highway vehicle (OHV) use at the site. The sites presently not being watered due to the extremely wet conditions at the site. The site was being watered on a consistent basis and water was also accessing the site from an upstream, offsite location. It was determined that Native Landscape would turn off the water at the site due to the excess amount of water being supplied. AMEC and Native Landscape will continue to monitor the site to determine when the irrigation system will need to be turned on. AMEC Earth & EñronmentaI, Inc. 5510 Morehouse Drive San Diego, CA 9I21 Tel 858.458..901 Fax 858458-0943 www.amec.com Ms. Sherri Howard January 15, 2002 Page 2 ameO` Weeds are not a problem on site at this time since weed control is occurring regularly (every ten days) for invasive species. All of the container plants are alive and there is an abundance of seeded and volunteer riparian species occurring throughout the site. The off -highway vehicle (OHV) tracks were not evident during this site visit and it appears that the volunteer species and all container plants at the site are colonizing the area thereby discouraging OHV's from using the site. AMEC will continue monthly horticulturat monitoring visits and submit monthly progress reports in accordance with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or e-mail me at jessica.walker©amec.com, if you have any questions. Sincerely, ,, Z24- Jessie Walker Botanist JW/css cc: Debbie Fromme; Native Landscape, Inc. File Contracts 3-1972-1000-1 007-3151• 9 ameO 02-028-3151 February 7, 2002 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Monthly Horticultural Monitoring Report for January 2002 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits this sixth monthly horticultural monitoring letter report for the restoration of temporary wetland impacts of the Cannon Road extension project (Macario Bridge), to the City of Carlsbad, California for your records. This report covers the month of January 2002. The project has the United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers Permit Application No. 97-20130-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97; CDFG California Incidental Take Permit—Permit No. 2081-1998-05-5; and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City of Carlsbad and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape). . On 18 January 2002 AMEC performed the sixth monthly site survey for year one of five for the Cannon Road Macario Brie wetland area horticultural monitoring program. During the site survey, AMEC biologist, Jessica Walker, met with the landscape maintenance contractor, Debbie Fiomme of Native Landscape to assess the condition of the site. This letter covers irrigation system maintenance, weed control, health of wetland vegetation, and off-highway vehicle (OHV) use at the site. The irrigation system was turned on. in late January after being turned off for approximately 2 months. During the site visit it was noted that the site appeared dry and that the wetland vegetation appeared stressed. The irrigation system was turned off in mid-November at the site because of the wet site conditions. These wet conditions were a result of the excessive water run-off from an upstream, off-site location and the recent rain events. There has been no rain in the past month and the water run-off from upstream has decreased. AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel 858-458-9044 Fax 858-458-0943 www.amec.com [IJ Ms. Sherri Howard February 7, 2002 Page 2 Weeds are not a problem on site at this time since weed control is occurring regularly (every ten days) for invasive species. Non-native species such as African brass-buttons (Cotula coronopiforia) and rabbitfoot grass (Polypogon monspeliensis) are still present on site, but are not being weeded since they are not invive. All of the-container plants are alive and there an abundance of seeded and volunteer riparian species occurring throughout the site. The off-highway vehicle (OHV) tracks were not evident during this site visit and it appears that the volunteer species and all container plants at the site are colonizing the area thereby discouraging OHV's from using the site. AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports in accordance with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or e-mail me atjessica.walker@amec.com, if you have any questions. Sincerely, AMEC Earth & Environmental Jessie Walker Botanist JW/css cc: Debbie Fromme; Native Landscape, Inc. File Contracts 3-i972-1000-1007-3151 9 ameO 02-047-3151 March 5, 2002 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Monthly Horticultural Monitoring Report, February 2002 and Triannual Formal Field Meeting Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits this seventh monthly horticultural monitoring letter report which also includes a discussion of the triannual field meeting for the temporary wetland impacts of the Cannon Road extension project (Macario Bridge), to the City of Carlsbad (the City), California for your records. The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers Permit Application No. 97-20130-TCD, 'City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97; CDFG California Incidental Take Permit - Permit No. 2081-1998-05-5; and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape). On 22 February 2002 AMEC performed the seventh monthly site survey for year one of five for the Cannon Road Macario Bridge wetland area horticultural monitoring program. The triannual formal field meeting with the City also took place. During the site visit, AMEC, the City, and the landscape maintenance contractors, Debbie Fromme and Mark Girard of Native Landscape, met to assess the condition of the site. 'This letter covers irrigation system maintenance, weed control, health of wetland vegetation, and bicycle use at the site. The wetland mitigation area is progressing favorably and as expected at this time. The irrigation system is supplying adequate levels of water to all areas of the mitigation site after being turned on again in late January. AMEC Earth & Environmental. Inc. 5510 Morehouse Drive. San Diego, CA 92121 Tel 858-458-904.4 Fax 858-458-0943 www.amec.com ameO Weeds are not a problem on site at this time since weed control is occurring regularly (every ten days) for invasive species. Non-native species such as African brass-buttons (Cot u/a coronopifolia) and rabbitfoot grass (Polypogon monspeliensis) are still present on site, but are not being weeded since they are not invasive. All of the container plants are alive and there is an abundance of seeded and volunteer riparian species occurring throughout the site. Bicycle tracks were evident during this site visit and it is obvious that bicycle use occurs in sevëratareasthroughout the site. On the northern portion of the site a small footpath is now being used as a bicycle trail to traverse the site. The City is proposing to install a gate and/or fence northeast of the site at a dirt access road where the foot and bicycle path begins. AMEC and Native Landscape will continue to monitor the bicycle use and corrective action will be taken if it continues and/or appears to be compromising the success of the site. AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports in accordance with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or e-mail me at jessica.walker@amec.com, if you have any questions. Sincerely, AMEC Earth & Environmental, Inc. Jessie Walker Botanist JW/css cc: Debbie Fromme; Native Landscape, Inc. File Contracts 3-1972-1000-1007-3151 ameO 02-063-3151 Project No. 3-1972-100071007-3151 April 2, 2002 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Monthly Horticultural Monitoring Report, March 2002 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits this eighth monthly horticultural monitoring letter report for the temporary wetland impacts of the Cannon Road extension project (Macario Bridge), to the City of Carlsbad (the City), California for your records. The project is authorized under United States Fish and Wildlife Service, Biological S . Opinion on Cannon Road (Reaches 1 and 2); U.S. Army Corps of Engineers Permit Application No. 97-20130-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97; CDFG California incidental Take Permit - Permit No. 2081-1998-05-5; and California Coastal Commission Coastal Development Permit No.. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape). On 19 March 2002 AMEC performed the eighth monthly site survey for year one of five for the Cannon Road Macario Bridge wetland area horticultural monitoring program. During the site visit, AMEC. the City, and the landscape maintenance contractor, Debbie Fromme of Native Landscape, met to assess the condition of the site. This letter covers irrigation system maintenance, weed control, health of wetland vegetation, and bicycle use at the site. . . The wetland mitigation area is progressing favorably and as expected at this time. The irrigation system is supplying, adequate levels of water to all areas of the mitigation site except for an area underneath the bridge where a sprinkler was clogged. This area was dry, but the plants did not appear stressed. Native Landscape Successfully unclogged this sprinkler the next day so that this area could receive water. AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel 858.458-9044 Fax 858458-0943 www.amec.com 11San-fs11wpWP Ms. Sherri Howard Project No. 3-1972-1000-1007-3151 ameO' Page 2 Weeds are not a problem on site at this time since weed control is occurring regularly (every ten days) for invasive species Non-native species such as African brass-buttons (Cotula Ooronopifolia) and rabbitfoot grass (PolypOgon monspeliensis) are still present on site, but are. not being weeded since they are not invasive. It appears that all of the container plants are alive, however a few of the blackberry (Rubus ursin), California rose (Rosa califomica), and willow (Salix lasiolepis) container plants appear stressed and/or possibly dead. At the April horticultural monitoring site visit, AMEC and Native Landscape will assess these container plants and recommend remedial measures if necessary. There is an abundance of seeded and volunteer riparian species occurring throughout the site and they are very healthy and vigorous. Bicycle tracks were still evident during this site visit and it is obvious that bicycle use is continuing in several areas throughout the site. On the northern portion of the site a small footpath is still being used as a bicycle trail to traverse the site. The City is proposing to install a gate and/Or fence northeast of. the site at a dirt access road where the foot and bicycle path begins. AMEC and Native Landscape will continue to monitor the bicycle use and corrective action will be taken if it continues and/or appears to be compromising the success of the site. AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports in accordance with the projects permits and agreements. Please call me at (858) 458-9044,: extension 264, or e-mail me atjessica.walker@amec.com, if you have. any questions. . Sincerely, AMEC Earth & Environmental Jessie Walker Botanist JW/css cc: Debbie Fromme, Native Landscape, Inc. File Contracts 11San-fs11wpWP S 02-088-3151 Project No. 3-1972-1000-1007-3151 May 3, 2002 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Monthly Horticultural Monitoring Report, May 2002 Dear Ms. Howard AMEC Earth & Environmental (AMEC) submits this ninth, monthly horticultural monitoring letter report for the temporary wetland impacts of the Cannon Road extension project (Macario Bridge), to the City of Carlsbad (the City), California tor your records. The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers: Permit Application No. 97-201 30-TCD, City of Carlsbad, California (1-6.97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97; CDFG California Incidental Take Permit - Permit No. 2081-. 1998-05-5; and California Coastal Commission Coastal Development Permit No. 6-97- 11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July, 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenanc e contractor; Native Landscape, Inc. (Native Landscape). On. 15 April 2002 AMEC performed the ninth monthly site survey for year one of five for the Cannon Road Macario Bridge wetland area horticultural monitoring program. During the site visit, AMEC and the landscape maintenance contractor, Debbie Fromme of Native Landscape, met to assess the condition of the site. This letter covers irrigation system maintenance, weed control, health of wetland vegetation, and bicycle use at the site. S , The wetland mitigation area is progressing favorably and as expected at this time. The irrigation system is supplying adequate levels of water to all areas of the mitigation site and weeds still are not a problem on site since weed control is occurring regularly for invasive species. Non-native species such as African brass-buttons (CoMa coronopifolia) and rabbitfoot grass (Polypogon monspeliensis) are still present on site, but are not being weeded since' they are-not invasive. AMEC Earth & Environmental. Inc. 5510 Morehóuse Drive San Diego CA 92121 858 458 9044 858 458 0943 Fax S-1972-10001007/3151-0502L055 Ms. Sherri Howard City of Carlsbad May 3, 2002 ameO 'Several blackberry (Rubus ursinus), Califorr rose (Rosa californica), and willow (Salix lasiolepis) container plants have died and wid need to be replaced, however, more than 90 percent of container plants are alive and healthy at this time. Recommendations for dead container plant replacement will occur d necessary in the first annual report. There continues to be an abundance of seeded and volunteer riparian species occurring throughout the site and they are very healthy and vigorous. Bicycle and motorcycle tracks were still evident during this site visit and it is obvious that use is continuing in several areas throughout the site. The City is proposing to install a gate and/or fence northeast of the site at a drzt access road where a foot and bicycle * ' path begins. AMEC and Native Landscape will continue to monitor the use and corrective action will be taken if it apears to be compromising the success of the site. AMEC will continue monthly horticultural moritoring visits and submit monthly progress reports in accordance with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or e-mail me at jessica.walker@ amec.com, if you have any questions. Sincerely, AMEC Earth & Environmental, Inc. W Jessie Walker Botanist JW/css cc: Debbie Fromme;, Native Landscape, Inc. File Contracts 3-1972-1 000-100713151-0502L055 Page 2 10 June 2002 ameO 02-102-3151 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Monthly Horticultural Monitoring Report, May 2002 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits this ninth monthly horticultural monitoring letter report for the temporary wetland impacts of the Cannon Road extension project (Ma'cario Bridge), to the City of Carlsbad (the City), California for your records. The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97; CDFG California Incidental Take Permit - Permit No. 2081- 1998-05-5; and California Coastal Commission Coastal Development Permit No. 6-97- 11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the CannOn Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape). On 22 May 2002 AMEC performed the tenth monthly site survey for year one àf five for the Cannon Road Macario Bridge wetland area horticultural monitoring program. During the site visit, AMEC and the landscape maintenance contractor, Debbie Fromme of Native Landscape, met to assess the condition of the site. This letter covers irrigation. system maintenance, weed control, health of wetland vegetation, harvesting of on-site plant material, and an on site homeless encampment. The site is presently performing well and has been properly maintained. Supplemental irrigation is presently being applied to all pOrtions of the wetland mitigation site; The majority of the site is wetland; however, the northeastern slope, which is adjacent to a concrete lined drainage ditch, consists of mulefat scrub and several coastal sage scrub plant species. AMEC recommends modifying the irrigation schedule for this portion of the mitigation site. In order to promote deep root growth, AMEC recommends the following alterations to the irrigation schedule. The slope adjacent to the concrete lined drainage ditch will be irrigated for 30 minutes, 2 times a week, for the next 6 weeks. After the initial 6 weeks, the water schedule should be changed to 30 minutes, once a week, for approximately 1 AMEC Earth & Envirmenta1, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel (858) 458-90.4 Fax (858) 458-0943 www.ec.com 319721000-1 007/3151-0602R044 Ms. Sherri Howard City of Carlsbad ameO 10 June 2002 month. After 1 month the water schedule should be changed to 30 minutes every 2 weeks for approximately 2 months. During fall irrigation will be used to mimic seasonal rain conditions if we do not receive normal rainfall. AMEC will monitor the site to ensure that the site remains healthy and that the supplemental water is penetrating the soil and reaching the roots. AMEC will work with Native Landscape to ensure that the irrigation schedule is altered. Weeds still are not a problem on site since weed control is occurring regularly for invasive species. Nonnative species such as African brass-buttons (Cotula coronopifolia) and rabbitfoot grass (Polypogon monspeliensis) are still present on site, but are not being weeded since they are not invasive. Several blackberry (Rubus ursinus), California rose (Rosa caifornica), and willow (Salix lasiolepis) container plants have died and will need to be replaced, however, more than 90 percent of container plants are alive and healthy at this time. Recommendations for dead container plant replacement will occur if necessary in the first annual report. There continues to be an abundance of seeded and volunteer riparian species occurring throughout the site and they are very healthy and vigorous. There is evidence of native vegetation harvesting at the wetland mitigation site. Bulrush and cattail are being harvested for seed and willow cuttings are being removed from the established on-site willow trees. The success of the site could be compromised if the harvesting is not discontinued. A homeless encampment has been established within the northeastern corner of the wetland mitigation area. The success of the site could be compromised if the homeless encampment remains and/or increases in size or residency. The safety and health of individuals working on the site may also be compromised if the encampment remains. AMEC recommends that the City take the necessary actions to ensure that the homeless encampment is removed. AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports in accordance with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or e-mail me at jessica.watker@amec.com, if you have any questions. Sincerely, MEC Ea h & Environmental, Inc ssi Walker Botanist JW/css cc: Debbie Fromme; Native Landscape, Inc. File Contracts 319721000-100713151-0602R044 Page 2 ameO 1 July 2002 02-123-3151 Project No. 319721 000-1 007 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Monthly Horticultural Monitoring Report and Triannual Formal Site Visit for June 2002 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits this eleventh monthly horticultural monitoring letter report for the temporary wetland impacts of the Cannon Road extension project (Macario Bridge), to the City of Carlsbad (the City), California for your records. This letter report also discusses the formal triannual site visit that occurred on the same day. The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application. No. 7-20130-TCD & 97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044- 97 & 5-045-97; CDFG California Incidental Take Permit - Permit No. 2081-1998-0-5; and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape). On 16 June 2002 AMEC performed the eleventh monthly horticultural site visit for year one of five for the Cannon Road Macario Bridge wetland area horticultural monitoring program. The triannual formal site visit with The City also took place on the same day. During the site visit, AMEC, 'The City, and the landscape maintenance contractor,, Debbie Frbmme of Native Landscape, met to assess the condition of .the site. This letter covers irrigation system maintenance, weed control, health of wetland vegetation, harvesting of plant material, and a homeless encampment. The site is presently performing well and has been properly maintained. Supplemental irrigation is presently being applied to all portions of the wetland mitigation site. The majority of the site is wetland; however, the northeastern slope, which is adjacent to a concrete lined drainage ditch, consists of mulefat scrub and several coastal sage scrub plant species. AMEC recommended modifying the irrigation schedule for this portion of the mitigation site during this monthly walk through and to the May walk through. Please see the May letter report for the AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel (858) 458.9044 3197210001007/3151-0701 R057 Fax (858) 458-0943 www.aniec.com S Ms. Sherri Howard City of Carlsbad 1 July 2002 ameO irrigation schedule modification. Native Landscape implemented this irrigation schedule modification during the last week in June 2002. Weeds still are not a problem since weed control is occurring regularly for invasive species, however, a highly invasive species, perennial pepperweed (Lepidium latifolium) was located during the site visit and removed. AMEC and Native Landscape will continue to monitor the site for highly invasive species such as perennial pepperweed. No new container plants or cuttings have died on the mitigation site. The several dead blackberry, California rose, willow, and mulefat plants that were noted in previous letter reports are not recommended for replacement at this time since there continues to be an abundance of seeded and volunteer riparian species occurring throughout the site which are healthy and vigorous. Replanting of species will only occur if success requirements are not met for year one. Success requirements will be evaluated when botanical monitoring for the first annual report is completed by the end of August. Mulefat (Baccharis salicifolia), willow species (Salix sp.), and bulrush (Scirpus robustus) were observed setting seed during the site visit and volunteer species such as spike rush (Eleocharis sp.), cattail (Typha latifolia), water cress (Rorippa nasturtium-a quaticum), and umbrella sedge (Cyperus sp.) were observed colonizing the mitigation site. The City indicated during this site visit that the harvesting of native vegetation at the wetland mitigation site, which was noted during the May horticultural visit, is unauthorized at this time. AMEC will continue to monitor the mitigation site and will notify the City if the harvesting continues. On 16 June 2002 the City sent a representative to notify the inhabitant of the homeless encampment that he/she must vacate the premises. If necessary, management action will be taken if the inhabitant does not vacate the site. AMEC will continue to assist with, and monitor the progress of the homeless encampment. AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports in accordance with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or e-mail me at jessica.walker©amec.com, if you have any questions. Sincerely, AMEC Earth & Environmental, Inc Jessie Walker Botanist cc: Debbie Fromme; Native Landscape, Inc. File Contracts 319721000-1007/3151-0701 R057 Page 2 [1 ameO 13 August 2002 02-151-3151 Ms. Sherri Howard Project Manager - City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland .Impacts of the Cannon Road Extension Project (Macario Bridge) Final Year One Monthly Horticultural Monitoring Report for July 2002 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits the twelfth monthly horticultural monitoring letter report of the temporary wetland impacts for the Cannon Road Extension Project, to the City of Carlsbad (the City), California for your records. This letter report is the last letter report for the first year of monthly horticultural monitoring after°the installation period, which ended in July 2001. All monthly horticultural reports after this letter report will pertain to the second year of the Cannon Road Extension Project. The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD & 97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044-97 & 5-045-97; CDFG California Incidental Take Permit - Permit No. 2081-1998-0-5; and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape) for year's one and two of the Cannon Road Extension Project. HortiOultural visits for year two, occurring monthly, will begin in August 2002 and will continue for one year.' On 2 August 2002 AMEC performed the twelfth monthly horticultural site visit for year one of five for the Cannon Road Macario Bridge wetland area horticultural monitoring program. During the mitigation site visit, AMEC and Debbie Fromme of Native Landscape, met to assess the condition of the mitigation site. This letter covers irrigation system maintenance, weed control, health of wetland vegetation, and a homeless encampment. AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel (858) 458-9044 Fax (858) 458-0943 WWW.ameC.COm 319721000-1007/ 3151-0802R098 Ms. Sherri Howard 13 August 2002 City of Carlsbad ameO The majority of the mitigation site is presently performing well. Supplemental irrigation is being applied to all portions of the wetland mitigation site. A new irrigation schedule was implemented during the last week in June 2002 (see May horticultural report for schedule) near the concrete lined drainage ditch on the northeastern upland portion of the mitigation site. This area is progressing well and appears to be adapting to the modified irrigation schedule. The entire mitigation site was accidentally off irrigation for .a short period in July but has since been fixed. AMEC did not visit the mitigation site when this happened and was informed by Native Landscape after the irrigation was turned back on During the August mitigation site visit it appeared that a portion of the revegetated access road was not receiving water. The soil was extremely dry and container and volunteer riparian obligate plants died. It appeared that these plants died due to dry weather conditions and lack of irrigation. AMEC recommended that the irrigation schedule on the revegetated access road be increased from 20 minutes, two days a week, to 30 minutes, two days a week on this portion of the revegetated access road. The landscape maintenance contractor implemented the new irrigation schedule for the portion of the revegetated access road after the mitigation site visit. Weeds still are not a problem since weed control is occurring regularly for invasive species. No I .invasive species were detected during the mitigation site visit and AMEC and Native Landscape will continue to monitor the mitigation site for invasive species. The majority of the plants that died on the revegetated access road are willow species, and mostly volunteers. The loss of these individuals will likely not compromise the success of the mitigation site due to other volunteer recruitment and replacement of container plants is not recommended at this time. Replanting of species would only be recommended if success standards are not met for year one. Success standards will be evaluated when botanical monitoring for the first annual report is completed. . Evening primerose (Oenothera elata ssp. hirsutissima) and mugwort (Atemisia douglasiana) were flowering and bulrush (Scirpus robustus) and cattail (Typha domingensis) were observed setting seed. Many volunteer species were observed colonizing the mitigation site and one southwestern spiny rush (Juncus acutus ssp. leopoldi,), a California sensitive plant and a natural volunteer, was located on site. On 16 June 2002 the City sent a representative to notify the inhabitant of the homeless encampment that he/she must vacate the premises. As of 2 August 2002, the homeless person had not vacated the mitigation site. Trash is beginning to accumulate around the homeless encampment and in the mitigation site. Plants in the mitigation site are being damaged or killed by harvesting and trampling. The success of the mitigation site, in the vicinity of the homeless encampment, is being compromised. AMEC will continue to monitor the homeless encampment and work in coordination with the City to help remedy this situation in the mitigation site. S 319721000-1007/ 3151 -0802R098 Page 2 Ms. Sherri Howard 13 August 2009 City of Carlsbad ameO AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports for year two in accordance with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or email me atjessica.walker@amec.com, if you have any questions. Sincerely, AMEC Earth & Environmental, Inc. - Jessie Walker Botanist JW/css cc: Debbie Fromme; Native Landscape, Inc. File Contracts I. • 319721000-1007/ 3151 -0802R098 Page 3 • 13 September 2002 02-161-3151 Project No. 319721000-1006 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subjct: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) First Year Two Monthly Horticultural Monitoring Report August 2002 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits the first monthly horticultural monitoring letter report of year two for the temporary wetland impacts for the Cannon Road Extension Project, to the City of Carlsbad (the City), California for your records. The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD ,& 97-20131-TCD, City of Carlsbad, 'California (1-6-97-F-51); California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044- 97 & 5-045-97; CDFG California Incidental Take Permit - Permit No. 2081-1998-0-5; and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape) for year's one and two of the Cannon Road Extension Project. 'Monthly horticultural site visits, for year two began in August 2002 and will continue for one year. On 28 August 2002 AMEC performed the first monthly horticultural site visit for year two of the Cannon Road Macario -Bridge wetland area horticultural monitoring program. During the horticultural site visit, AMEC and Debbie Fromme of Native Landscape, met to assess the condition of the mitigation site. Sherri Howard, from the City, joined AMEC and Nativ9 Landscape at the end of ,the' horticultural site visit to 'discuss the onsite homeless encampment. This' letter covers irrigation system maintenance, Weed control, health of wetland vegetation, and a homeless encampment.- The majority of the mitigation site is presently performing well. Supplemental irrigation is being applied to all portions of the wetland mitigation site. The ,irrigation schedule appears to be appropriate for all portions of the site, including the revegetated access road and the upland slope adjacent to the concrete lined drainage ditch. No changes to the irrigation schedule are recommended at this time. AMEC and Native Landscape will continue to monitor' the irrigation schedule. • AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel (858) 458-9044 Fax (858) 458-0943 www.amec.com 319721000-100613151-0902R115 Ms. Sherri Howard City of Carlsbad 5 13 September 2002 ameO Weeds are still not a problem since weed control is occurring regularly for invasive species. No invasive species were detected during the mitigation site visit and AMEC and Native Landscape will continue to monitor the mitigation site for invasive species. No new dead container or.volunteer plants were located on the revegetated access road during this horticultural site visit,. as opposed to the last horticultural site visit. Animal herbivory occurred on the bases of some of the dead container and volunteer plants that were located during the last horticultural site visit. These plants most likely died from a combination of inadequate water and animal herbivory. Replanting of these dead container plants is not recommended at this time, due to the large amount of volunteer species in the mitigation site. Repla'nting will be recommended if success standards are not met for year one. Success standards will be evaluated when botanical monitoring for the first annual report is completed. Evening primrose (Oenothera elata ssp. hirsutissima), California mugwort (Artemisia douglasiana), western ragweed (Ambrosia psilostachya), and narrow-leaf willow (Salix exigua) were flowering, and California wild rose (Rosa californica) was observed seeding. Many volunteer species were observed colonizing the mitigation site and two southwestern spiny rush (Juncus acutus ssp. leopoldil) plants, a California sensitive plant, were observed in the mitigation site during this horticultural site visit. During the last horticultural site visit, only one southwestern spiny rush was located. The homeless person occupying the mitigation site was still present during this horticultural site S visit. Trash has accumulated around the homeless encampment and throughout the mitigation site and has increased since the last, horticultural site visit on 2 August 2002. No. additional. plant damage, other than what was noted during the last horticultural site visit, has occurred in the mitigation site. The success of the mitigation site however, in the vicinity of the homeless encampment, is still being compromised. The City, AMEC and the Landscape contractor noted the homeless encampment, the additional trash, and discussed the problems and issues associated with the homeless encampment. The City will post another notice at the homeless encampment to vacate the premises and AMEC will continue to monitor the situation and work in coordination with the City to help solve this problem. AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports for year two in accordance with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or email me at jessica.walker@amec.com, if you have any questions. Sincerely, AMEC Earth & Environmental, Inc. Jessie Walker Botanist JW/css cc: Debbie Fromme; Native Landscape, Inc. S File Contracts 319721000-1006/3151-0902R115 Page 2 25 September 2002 amec19 02-163-3151 Project No. 3-19721000 Ms. Sherri-Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Second Year Two Monthly Horticultural Monitoring Report August 2002 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits the second monthly horticultural monitoring letter report for the temporary wetland impacts for the Cannon Road Extension Project, to the City of Carlsbad (the City), California for your records. The project is authorized under United States Fish and Wildlife Service, Biological Opinion on . S Cannon Road (Reaches 1 and 2); United States Army Corps of Engineers Permit Application No. 97-20130-TCD & 97-20131-TCD, City of Carlsbad, California (1-6-97-F-51); California D.epartmentFish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044- 97 & 5-045-97; CDFG California . Incidental Take Permit (No. 20.81-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape) for year's one and two of the Cannon Road Extension Project. This is the second monthly horticultural report for year two. On 20 September 2002 AMEC performed the second monthly horticultural site visit for year two of the Cannon Road Macario Bridge wetland area horticultural monitoring program. During the horticultural site visit, AMEC and Debbie Fromme of Native Landscape, met to assess the condition of the mitigation site. This letter covers irrigation system maintenance, weed control, health of wetland vegetation, and a homeless encampment. . • The majority of the mitigation site is presently performing well. Supplemental irrigation is being applied to all portions of the wetland mitigation, site. The irrigation schedule appears to be appropriate for all portions of the mitigation site, including the revegetated access road and the upland slope adjacent to the concrete lined drainage ditch. The majority of the plant species appear to be receiving an appropriate amount of water, however, risers will be installed on the upland slope adjacent to the concrete lined drainage ditch so that water can reach all portions of this slope. The vegetation has grown tall which is preventing water from reaching, all portions of the slope. AMEC and Native Landscape will continue to monitor the irrigation on the mitigation site. AMEC Earth & Environmental. Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel (858) 458-9044 Fax (858) 458-0943 www.amec.com 319721000-1007/3151-0902R 119 Ms. Sherri Howard City of Carlsbad ameO 25 September 2002 Several native and nonnative weed species were located during the horticultural site visit. Cocklebur (Xanthium strumarium), a native weedy riparian species that tends to colonize riparian areas and can become an aggressive invasive species was located along the old accesses road. Bristly ox-tongue (Picris echioides), a nonnative weedy species, that is less aggressive, but is none the less a nonnative riparian species that should be removed was also located in the same area. AMEC recommended that these two species be removed from the mitigation site. AMEC and Native Landscape will continue to monitor the mitigation site for invasive species. No new dead container or volunteer plants were located on the revegetated access road during this horticultural site visit: Replanting of the already existing dead container plants is not recommended at this time, due to the large amount of volunteer species in the mitigation site. Replanting will be recommended if success standards are not met for year one. Success standards will be evaluated when botanical monitoring for the first annual report is completed in October. Evening primrose (Qenothera elata ssp. hirsutissima), arrow weed (Pluchea sericea), saltmarsh fleabane (Pluchea odorata), and goldenbush (Isocoma menziesii) were flowering, and California mugwdrt (Artemisia .douglasiana), evening primrose, and cattail (Tpha sp.) were observed seeding. Many volunteer species were observed colonizing the mitigation site. Some new species located in the mitigation site include salt heliotrope (Heliotropium curassavicum), jimson weed (Datura wrighti,), and tarplant (Deinandra fasciculata). The homeless person occupying the mitigation site may have vacated the mitigation site. The clothes, personal belongings, and trash that had accumulated have been removed from the area where this homeless person had been living. It is unclear whether this person left the mitigation site entirely, so AMEC will continue to monitor the mitigation site to determine if the homeless person vacated the mitigation site. AMEC will .continue monthly horticultural monitoring visits and submit monthly progress reports for year two in accordance with the project's permits and agreements. Please call me at (858) 458-9044, extension 264, or email me atjessica.walker@amec.com, if you have any questions. Sincerely, AMEC Earth & Environmental, Inc. Jessie Walker Botanist - JW/css cc: Debbie Fromme; Native Landscape, Inc. File Contracts 319721 000-1 007/3151-0902R119 -Page 2 6 November 2002 02-190-3151 Project No. 319721 000-1 006 Ms. Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Third Year Two Monthly Horticultural Monitoring Report and Triannual Formal Field Meeting for October 2002 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits the third monthly horticultural monitoring letter report for the temporary wetland impacts for the Cannon Road Extension Project, to the City of Carlsbad (the City), California for your records. The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2); United States 'Army Corps of Engineers Permit Application No. 97-20130-TCD & 97-20131-TCD, City of' Carlsbad, California (1-6-97-F-51);. California Department Fish and Game (CDFG) Section 1601 Streambed Alteration Agreement No. 5-044- 97 & 5-045-97; CDFG California Incidental Take Permit .(No'. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape) for year's one and two of the Cannon Road Extension Project. This is the third monthly horticultural report for year two. On 17 October 2002 AMEC'performed the third monthly horticultural site visit for year two of the Cannon Road Macarlo Bridge wetland area horticultural monitoring program. The triannual formal field meeting with the City also took place on the same day. During the site visit, AMEC, the City, and the landscape maintenance contractor, Debbie Frommeof Native Landscapè,'met to assess the condition of the site: This letter covers irrigation system maintenance, weed control, health of wetland vegetation, and a homeless encampment. The majority of the mitigation site is presently performing well. Supplemental irrigation is being applied to all portions of the wetland mitigation site. The present irrigation schedule. for the access road is 30 minutes, twice a week; the upland slope adjacent to the concrete lined drainage ditch is 30 minutes, once every two weeks; and the rest of the mitigation site is 20 minutes, twice a week; AMEC and Native Landscape will continue to monitor the irrigation on the mitigation site. ' AMEC Earth & Environmental, Inc. 5510 Morehouse Drive San Diego, CA 92121 Tel (858) 458-9044 ' Fax (858)458-0943 wwamec.com ' 319721000-1006/3151-1102R138 Ms. Sherri Howard City of Carlsbad 6 November 2002 Cocklebur (Xanthium strumarium), bristly ox-tongue (Picris echioides), pampas grass (Cortaderia sp.) and tamarisk (Tamarix sp.) were all located at. the mitigation site during the month of October. The cocklebur and bristly ox-tongue had gone to seed. It was recommended that the larger bristly ox-tongue and cocklebur plants be hand pulled while the smaller ones be' sprayed with herbicide. Only one small tamarisk and three small pampas grass were located and AMEC recommended that these plants be hand pulled as well. AMEC and Native Landscape will continue to monitor the mitigation site for invasive species. Dead container plants were located in the mitigation site during the month of October and will be discussed in the' First Annual Report for 2002. Necessary remedial measures for these dead species will also be addressed in the First Annual Report for 2002 that will be completed by the end of 2002. Evening primrose (Oenothera eIta ssp. hirsutissima), arrow weed (Pluchea sericea), saltmarsh fleabane (Pluchea odorata), were flowering, and goldenbush (Isocoma menziesii), California mugwort (Artemisia douglasiana), evening primrose, and cattail (Typha sp.) were observed seeding. Many volunteer species were observed colonizing the mitigation site. The homeless person that was previously occupying the mitigation site was not located during the site visit. None of the personal belongings were located either.' AMEC will continue to monitor the mitigation site to ensure that the homeless person has vacated the mitigation site. AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports for year two in accordance with the' project's permits and agreements. Please call me at (858) 458-9044, extension 264, or email me at jessica.walker@amec.com, if you have any questions. Sincerely, AMEC Earth & Environmental, Inc. Jessie Walker Botanist JW/css cc: Debbie Fromme; Native Landscape, Inc. File, Contracts 319721000-1006/3151-1102R138 Page 2 ameO 5 December 2002 02-197-3151 Project No. 319721000 Ms; Sherri Howard Project Manager City of Carlsbad Engineering Department 1635 Faraday Avenue Carlsbad, California 92008 Subject: Temporary Wetland Impacts of the Cannon Road Extension Project (Macario Bridge) Year Two Fourth Monthly Horticultural Monitoring Report for November 2002 Dear Ms. Howard: AMEC Earth & Environmental (AMEC) submits the fourth monthly horticultural monitoring letter report for the temporary wetland impacts for the Cannon Road Extension Project, to the City of Carlsbad (the City), California for your records. The project is authorized under United States Fish and Wildlife Service, Biological Opinion on Cannon Road (Reaches 1 and 2);. United States Army Corps of Engineers Permit Application No. 97-201.30-TCD & - 97-20131-TCD, City of Carlsbad, California (1 -6-97-F-51); California Department Fish and Game (CDFG) Section 1601 'Streambed Alteration Agreement No. 5-044- 97 & 5-045-97; CDFG California Incidental Take Permit (No. 2081-1998-0-5); and California Coastal Commission Coastal Development Permit No. 6-97-11. According to the Conceptual Wetland Mitigation Plan for Temporary Wetland Impacts of the Cannon Road Extension Project Carlsbad, California, July 2000, monthly horticultural monitoring reports must be sent to the City and the landscape maintenance contractor, Native Landscape, Inc. (Native Landscape) for year's one and two of the Cannon Road Extension Project. This is the fourth monthly horticultural report for year two. On 19 November 2002 AMEC performed the fourth monthly horticultural site visit for year two of the Cannon Road Macario Bridge wetland area horticultUral monitoring program. During the site visit, AMEC and the landscape maintenance contractor, Debbie Fromme of Native Landscape, met to assess the condition of the site. This letter'covérs irrigation system maintenance, weed control, the health of wetland 'vegetation, and coastal California gnatcatchers' .PoIiopti!a californica californica) which'were observed on 'the periphery of the mitigation site. The majority of the mitigation site is presently performing well. Supplemental irrigation is being. applied to all, portions of the wetland mitigation site. Two sprinklers, both under the bridge will be raised since 'they are blocked by vegetation that has grown taller than the sprinklers. This will allow water to reach drier portions of the mitigation site underneath the bridge. AMEC and Native Landscape will continue to monitor the irrigation on the mitigation site. AMEC Earth & Environmental, Inc. 5510 Mdrehouse Drive San Diego, CA 92121 Tel (858) 458.9044 y ID% ACC AMA' 319721000-1001/3151-1202R150 Ms. Sherri Howard City of Carlsbad 5 December 2002 ame& The cocklebur (Xanfhium strumarium), bristly ox-tongue (Picris echioides), pampas grass (Cortaderia sp.) and tamarisk (Tamarix sp.) which were all located at the mitigation site during the month of October had been completely 'removed by Native Landscape as of the November horticultural visist. AMEC 'and Native Landscape will continue to monitor the mitigation site for invasive species. Dead container plants were located in the mitigation site during the month of October and will be discussed in the First Annual Report for 2002. Necessary remedial measures for these dead species will also be addressed in the First Annual Report for 2002 that will be completed by the end of 2002. It was noted that several narrow-leaved willow trees had been herbivorized by small mammals in the mitigation area. Some of these narrow-leaved willow trees, had subsequently died. Evening primrose (Qenothera elata ssp. hirsutissima), arrow weed (Pluchea sericea), and saltmarsh fleabane (Pluchea odorata), were observed seeding. Many volunteer species were also observed colonizing the mitigation site. Coastal California gnatcatchers (Polioptila californica californica) have. ,been observed foraging in and on the periphery of the mitigation site during the last 3 horticultural visits. They have been observed in the northeast portion and southwestern portion of the mitigation site at both. ends of the revegetated access road. . AMEC will continue monthly horticultural monitoring visits and submit monthly progress reports for year two in accordance with the project's permits and agreements... Please call me at. (858) 458-9044, extension 264, or email me at jessica.walker@amec.com, if you have any questions. Sincerely, AMEC Earth & Environmental, Inc. Jessie Walker Botanist JW/css cc: Debbie Fromme; Native Landscape,. Inc. File Contracts 319721 000.1001/3151-1202R150 I )o [I APPENDIX B 'PHOTO VIEWPOINT LOCATIONS FOR S AUGUST 2001 AND OCTOBER 2002 V. .. -V- -- V V. A. Viewpoint 1A -2001 *_ ------- - - -- - - - - \ 4 ' a Viewpoint 1A - 2002 Cannon Road Wetland Mitigation Site d1nee Photograph Viewpoints 2001 - 2002 Graphics 2/3151/Cannon Road/Cannon Viewpoint IA.FH8 FIGURE S intl B - 2001 .• -- • -tr_ .•. 'uc-, ,-,_.•, UIi -I '} (•i 1l14-1 &' ' ~-m N. ____________ --- J :-,- •. ... - V. -. . 10-23.2002 intlB-2002 FIGURE Cannon Road Wetland Mitigation Site Photograph Viewpoints 2001 - 2002 • — Graphics 2/3151 /Cannon Road/Cannon Viewpoint IB.FHB - - • - I ~m 17 f I 4 -—_hl _, •..' . .- - I VIewpoint iC -2001 Viewpoint 1C - 2002 FIGURE Cannon Road Wetland Mitigation Site Photograph Viewpoints 2001 - 2002 Graphics 151/Cannon Road/Cannon Viewpoint 1 C.FH8 Viewpoint 2 - 2001 Viewpoint 2 - 2002 Cannon Road Wetland Mitigation Site Photograph Viewpoints 2001 - 2002 FIGURE B.4 Graphics 213151/Cannon Road/Cannon Viewpoint 2.FH8 r'. - . . -. _)_ .' •1 £ - A gv 4' r. ' .. . t1 11 "t c. i\ ':-' ... • , •f ,. .• - 1'A? . . - Is'..-. - •.-.:'•. , •;#':ii.~ \t '' (r / ' -It - • •J - - il p • I41 \ 4 A d J; 3 __ q /1:1-At P Op '• ' 411. I Photograph Viewpoints 2001- 2002 . I F -- , ? - ; ---- ommjj~k A~ NOW ••.1 ••f% p F •1. jc: : •' 4 '• :• T 7W,irro ;5c H S 7 S (s -: S S S• S / S5 S C.S --- S - i /S i S45 5 j; S\4 !4:R_ A S ' S I ,S / - - I, S\:t5 S SIP :; Photograph Viewpoints 2001- 2002 B- APPENDIX C PHOTO DOCUMENTATION AT TRANSECT LOCATIONS .0 t ..(, ... • ' . .j.. - qfq I4 , t v•' i" - - . ;_ -. ?1'!J ..f ." •-.- .. )- / •• ( r. , 1I -' 10% -V .. -f-. Sh - . •.... r,_------ . q - 'Z I, S. • • . ' w . •' :fr' :- • '.. : - _•J' 1'J ;I • ____ ALM _I '4' - _.4 1, I Il p .j _____ - g", . '•. .111 ,•. .'\i ii . - i.. -- c4k.- .- •. ._.'i ...- Lr 1111 - IA A Y - Nit Ie ;• '? 7 - -_ .: :• ;. •--- •- .. -, -I_; ;-'.- ? I -- AM 7 III i a a 1 r — fl Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 End Percent Transect Species Common Name Begin (m) (m) Cover (m) Cover 1 bare ground bare ground 0 0.15 0.15 0.50 1 Baccharis salicifolia mulefat 0.15 0.52 0.37 1.23 1 bare ground bare ground 0.52 1.09 0.57 1.90 1 Baccharissalicifolia mulefat 1.09 1.2 0.11 0.37 1 bare ground bare ground 1.2 1.58 0.38 1.27 1 Pluchea odorata salt marsh fleabane 1.58 1.6 0.02 0.07 1 bare ground bare ground 1.6 1.63 0.03 0.10 1 Pluchea odorata salt marsh fleabane 1.63 1.7 0.07 0.23 1 He/jotropium curassavicum salt heliotrope 1.7 2.01 0.31 1.03 1 bare ground bare ground 2.01 2.78 0.77 2.57 1 Polypogon monospeliensis rabbitfoot grass 2.78 2.83 0.05 0.17 1 bare ground bare ground 2.83 3.61 0.78 2.60 I Polypogon monospeliensis rabbitfoot grass 3.61 3.78 0.17 0.57 1 bare ground bare ground 3.78 4.3 0.52 1.73 1 Polypogon monospeliensis rabbitfoot grass 4.3 4.45 0.15 0.50 1 bare ground bare ground 4.45 6 1.55 5.17 1 Polypogon monospeliensis rabbitfoot grass 6 6.38 0.38 1.27 1 bare ground bare ground 6.38 7.1 0.72 2.40 1 litter litter 7.1 7.3 0.2 0.67 1 Polypogon monospeliensis rabbitfoot grass 7.3 7.6 0.3 1.00 1 bare ground bare ground 7.6 7.69 0.09 0.30 . 1 Scirpus robustus prairie bulrush 7.69 7.72 0.03 0.10 1 Polypogon monospeliensis rabbitfoot grass 7.69 7.81 0.12 0.40 1 bare ground bare ground 7.81 7.93 0.12 0.40 1 Polypogon monospeliensis rabbitfoot grass 7.93 8.15 0.22 0.73 1 bare ground bare ground 8.15 8.47 0.32 1.07 I Polypogon monospeliensis rabbitfoot grass 8.47 8.63 0.16 0.53 1 bare ground bare ground 8.63 8.74 0.11 0.37 1 Polypogon monospeliensis rabbitfoot grass 8.74 8.95 0.21 0.70 1 Ambrosia psilostachya westernragweed 8.95 9.05 0.1 0.33 1 Polypogon monospeliensis rabbitfoot grass 9.05 9.25 0.2 0.67 1 bare ground bare ground 9.25 10.33 1.08 3.60 1 litter litter , 10.33 10.7 0.37 1.23 1 Polypogon monospeliensis rabbitfoot grass 10.7 11.88 1.18 3.93 1 bare ground bare ground 11.88 14.7 2.82 9.40 1 Rubus ursinus California blackberry 14.7 14.73 0.03 0.10 1 bare ground bare ground 14.73 15.05 0.32 1.07 1 Ambrosia psilostachya western ragweed 15.05 15.13 0.08 0.27 1 bare ground bare ground 15.13 15.59 0.46 1.53 1 • Ambrosia psilostachya western ragweed 15.59 16 0.41 • 1.37- 1 bare ground bare ground 16 16.38 0.38 1.27 1 Polypogon monospeliensis rabbitfoot grass • 16.38 16.44 0.06 0.20 1 litter litter 16.44 16.49 0.05 0.17 1 . 1 Polypogon monospeliensis rabbitfoot grass 16.49 16.65 0.16 0.53 Scirpus robustus prairie bulrush 16.65 16.78 0.13 0.43 I of 15 n 1 bare ground 1 Anemopsis californica 1 Ambrosia psilostachya 1 Scirpus robustus 1 bare ground 1 Scirpus robustus 1 Heliotropium curassavicum 1 bare ground 1 0enothera elata ssp. hirsutissima 1 litter 1 Oenothera elata ssp. hirsutissima 1 Heliotropium curassavicum 1 bare ground 1 Polypogon monospeliensis 1 Anemopsis californica 1 bare ground 1 Polypogon monospeliensis 1 Baccharis salicifolia 1 Baccharis pilularis 1 Scirpus robustus 1 bare ground 1 Polypogon monospeliensis 1 bare ground 1 Scirpus robustus ,1 litter 1 bare ground 1 Salix exigua 1 bare ground 1 Baccharis salicifolia 1 bare ground 1 Salix Iasiólepis 1 bare ground 1 Salix exigua 1 bare ground 2 bare ground 2 litter 2 bare ground 2 Polypogon monospeliensis 2 bare ground 2 litter 2 bare ground 2 Polypogon monospeliensis 2 bare ground 2 Polypogon monospeliensis 2 Ambrosia psilostachya 2 Baccharis salicifolia 2 Baccharis salicifolia annon Road Wetland Mitigation S Botanical Monitoring Raw Data October 2002 bare ground 16.78 yerba mansa 16.94 western ragweed 16.94 prairie bulrush 17.15 bare ground 17.19 prairie bulrush 17.25 salt heliotrope 17.28 bare ground 17.37 evening primrose 17.48 litter 17.52 evening primrose 17.56 salt heliotrope 17.65 bare ground 17.68 rabbitfoot grass 18.05 yerba mansa 18.19 bare ground 18.62 rabbitfoot grass 18.7 mulefat 19.1 coyote bush 19.69 prairie bulrush 19.85 bare ground 19.9 rabbitfoot grass 21. bare ground 21.9 prairie bulrush 22.02 litter 22.1 bare ground 22.4 narrow-leaved willow 22.65 bare ground 23.2 mulefat 23.9 bare ground 24.15 arroyo willow 23.9 bare ground 26.5 narrow-leaved willow 28 bare ground 28.3 bare ground 0 litter 0.8 bare ground 1.2 rabbitfoot grass 1.32 bare ground 1.43 litter 2.95 bare ground 2.98 rabbitfoot grass 3.3 bare ground 3.37 rabbitfoot grass 5.2 western ragweed 5.65 mulefat 6.01 mulefat 6.33 16.94 0.16 0.53 17.05 0.11 0.37 17.15 0.21 0.70 17.19 0.04 0.13 17.25 0.06 0.20 17.28 0.03 0.10 17.37 0.09 0.30 17.48 0.11 0.37 17.52 0.04 0.13 17.56 0.04 0.13 17.65 0.09 0.30 17.68 0.03 0.10 18.05. 0.37 1.23 18.62 0.57 1.90 18.22 0.03 0.10 18.7 0.08 0.27 19.8 1.1 3.67 19.85 0.75 2.50 19.7 0.01 0.03 19.9 0.05 0.17 21 1.1 . 3.67 21.9 . 0.9 3.00 22.02 0.12 0.40 22.1 0.08 0.27 22.4 0.3 1.00 22.65 0.25 0.83 23.2 0.55 1.83 23.9 0.7 2.33 24.15 0.25 0.83 24.6 0.45 1.50 26.5 2.6 8.67 28 1.5 5.00 28.3 0.3 1.00 30 1.7 5.67 0.8 0.8 2.67 1.2 0.4 1.33 1.32 0.12 0.40 1.43 0.11 0.37 2.95 1.52 5.07 2.98 0.03 . 0.10 3.3 0.32 1.07 3.37 0.07 0.23 5.2 1.83 6.10 5.7 0.5 1.67 6.33 0.68 2.27 6.03 0.02 0.07 77 1.37 4.57 2 of 15 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 . 2 Oenothera elata ssp. hirsutissima evening primrose 7 7.7 0.7 2.33 2 bare ground bare ground . 7.7 8 0.3 1.00 2 Polypogon monospeliensis rabbitfoot grass 8 8.15 0.15 0.50 2 Soirpus californicus California bulrush 8.15 8.85 0.7 2.33 2 Polypogon monospeliensis rabbitfoot grass 8.5 8.7 0.2 0.67 2 Baccharissalicifolia mulefat 8.7 9.95 1.25 4.17 2 Artemisia douglasiana California mugwort 9.3 9.5 . 0.2 0.67 2 Scirpuscalifornicus California bulrush 9.73 10.55 0.82 2.73 2 Heliotropium curassavicum salt heliotrope 10.54 10.66 0.12 0.40 2 bare ground bare ground 10.66 11 0.34 1.13 2 Scirpus californicus California bulrush 11 23.93 12.93 43.10 2 Heliotropium curassavicum salt heliotrope 11.3 11.43 .0.13 0.43 2 Typha latifolia tall cattail 11.85 19.1 7.25 24.17 2 Anemopsis californica yerba mansa 12.4 13.5 1.1 3.67 2 Anemopsis californica yerba mansa 14.15 14.7 0.55 1.83 2 Scirpus robustus . prairie bulrush 13.95 19.1 5.15 17.17 2 Salixlasiolepis arroyo willow 17.4 .18 0.6 2.00 2 Oenothera elata ssp. hirsutissima evening primrose 17.45 17.7 0.25 0.83 2 Scirpusrobustus prairie bulrush 20.3 20.35 0.05 0.17 2 Scirpus robustus . prairie bulrush 22.05 22.81 0.76 2.53 2 . Salix lasiolepis arroyo willow 22 22.5 0.5 1.67 2 Anemopsis californica yerba mansa 22.25 22.51 0.26 0.87 2 Typha latifolia tall cattail 22.8 23.7 0.9 3.00 2 Salixlasiolepis arroyo willow 23.12 23.2 0.08 0.27 2 Polypogon monospeliensis rabbitfoot grass 23.35 23.54 0.19 0.63 2 Anemopsis califomnica yerba mansa 23.44 23.46 0.02 0.07 2 Anemopsiscalifomnica yerba mansa 23.57 23.77 0.2 0.67 2 Polypogon monospeliensis rabbitfoot grass 23.93 24.07 0.14 0.47 2 litter litter 24.07 24.35 0.28 0.93 2 Artemisia douglasiana California mugwort 24.35 24.45 0.1 . 0.33 2 litter litter 24.45 24.86 0.41 1.37 2 Scirpus robustus prairie bulrush 24.86 25.15 0.29 0.97 2 Ambrosia psilostachya western ragweed 24.92 24.94 0.02 0.07 2 litter litter 25.15 25.3 0.15 0.50 2 Ambrosia psilostachya western ragweed 25.3 25.55 0.25 0.83 2 Scirpusrobustus prairie bUlrush 25.34 25.38 0.04 0.13 2 litter litter 25.55 25.6 0.05 0.17 2 Scirpus robustus prairie bulrush 25.6 26.35 0.75 2.50 2 Anemopsis californica . yerba mansa '25.95 26 0.05 0.17 2 Ambrosia psilostachya western ragweed 26.1 26.78 0.68 2.27 2 Scirpusrobustus prairie bulrush 26.68 26.87 0.19 0.63 2 bare ground bare ground 26.87 27 0.13 , 0.43 2 Scirpusrobustus prairie bulrush 27 27.14 0.14 0.47 2 litter litter, 27.14 27.2 0.06 0.20 2 Ambrosia psilostachya western ragweed 27.2 27.3 0.1 0.33 . 2 bare ground bare ground 27.3 27.55 0.25 0.83 2 Scirpus californicus . California bulrush 27.55 27.67 0.12 0.40 3 of 15 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 . 2 litter litter 26.67 27.7 1.03 3.43 2 Polypogon monospeliensis rabbitfoot grass 27.92 28.4 0.48 1.60 2 Baccharis salicifolia mulefat 27.95 28.35 0.4 1.33 2 Salixlasiolepis arroyo willow 28.35 29.3 0.95 3.17 2 Scirpus californicus California bulrush 29.22 29.23 0.01 0.03 2 bare ground bare ground 29.23 30 0.77 2.57' 3 bare ground bare ground 0 0.95 0.95 3.17 3 Pluchea odorafa salt marsh fleabane 0.95 0.99 0.04 0.13 3 bare ground bare ground 0.99 1.93 0.94 3.13 3 Plucheaodorafa salt marsh fleabane 1.93 1.96 0.03 0.10 3 bare ground bare ground 1.96 2.27 0.31 1.03 3 Salixgooddingii ' black willow 2.27 2.3 0.03 0.10 3 bare ground bare ground 2.3 3.15 0.85 2.83 3 Oenothera elafa ssp. hirsufissima evening primrose 3.15 3.24 0.09 0.30 3 bare ground bare ground 3.24 3.49 0.25 0.83 3 Artemisia douglasiana California mugwort 3.49 3.76 0.27' 0.90 3 Polypogon monospeliensis rabbitfoot grass 3.76 ' 3.79 0.03 0.10 3 bare ground bare ground 3.79 4.31 0.52 1.73 3 Anemopsis californica yerba mansa 4.31 4.34 0.03 0.10 3 Artemisia douglasiana California mugwort 4.34 4.36 0.02 0.07 3 bare ground bare ground 4.36 4.71 0.35 1.17 3 Artemisia douglasiana California mugwort 4.71 4.9 - 0.19 0.63 3 Polypogon monospeliensis rabbitfoot grass 4.75 4.8 0.05 0.17 S 3 Anemopsis californica ' yerba mansa 4.9 4.93 0:03 0.10 3 litter litter , 4.93 5.4 0.47 1.57 3 Artemisia douglasiana California mugwort 5.4 5.63 0.23 0.77 3 litter litter 5.63 5.77 0.14 0.47 3 Artemisia douglasiana California mugwort 5.77 6.42 0.65 2.17 3 Baccharissalicifolia mulefat 5.79 5.95 0.16 0.53 3 Baccharis salicifofia mulefat 6.42 6.43 0.01 0.03 3 bare ground bare ground 6.43 7 0.57 1.90 3 Anemopsis californica yerba mansa 7 7.12 0.12 0.40 3 bare ground bare ground 7.12 7.98 0.86 2.87 3 Anemopsis californica yerba mansa 7.98 8.21 0.23 0.77 3 Artemisia douglasiana California mugwort 8.21 8.39 0.18 0.60 3 bare ground bare ground 8.39 8.95 0.56 1.87 3 Polypogon monospeliensis rabbitfoot grass 8.95 9.06 0.11 0.37 3 Anemopsis californica yerba mansa 9.06 9.13 0.07 0.23 3 bare ground bare ground 9.13 9.23 0.1 0.33 3 Artemisia douglasiana California mugwort 9.23 9.56 0.33 1.10 '3 Oenothera elafa ssp. hirsutissima evening primrose 9.52 9.56 0.04 0.13 3 bare ground bare ground 9.56 10.08 0.52 1.73 3 Oenothera elata ssp. hirsufissima evening primrose 10.08 10.1 0.02 0.07 3 bare ground bare ground 10.1 10.55 0.45 1.50 3 Baccharis salicifolia mulefat 10.55 10.6 0.05 0.17 . 3 bare ground bare ground 10.6 10.79 0.19 0.63 3 Artemisia douglasiana California mugwort 10.79 10.84 0.05 0.17 4 of 15 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 3 bare ground bare ground 10.84 11.06 0.22 0.73 W 3 Artemisia douglasiana California mugwort 11.06 11.1 0.04 0.13 3 bare ground bare ground 11.1 11.61 0.51 1.70 3 . Artemisia douglasiana California mugwort 11.61 11.62 0.01 0.03 3 bare ground bare ground 11.62 12.13 0.51 1.70 3 Pluchea odorata salt marsh fleabane 12.13 12.15 0.02 0.07 3 Artemisia douglasiana California mugwort 12.15 12.4 0.25 0.83 3 litter litter 12.4 12.5 0.1 0.33 3 Artemisia palmeri San Diego sagewort 12.5 12.57 0.07 0.23 3 Artemisia douglasiana California mugwort 12.57 13.3 0.73 2.43 3 bare ground bare ground 13.3 14 0.7 2.33 3 litter litter 14 14.4 0.4 1.33 3 Pluchea odorata salt marsh fleabane 14.4 14.9 0.5 1.67 3 bare ground bare ground 14.9 15.1 0.2 0.67 3 Artemisia douglasiana California mugwort 15.1 15.14 0.04 0.13 3 Scirpus robustus prairie bulrush 15.14 16.45 1.31 4.37 3 Pluchea odorata salt marsh fleabane 15.4 15.45 0.05 0.17 Salixgooddingll black willow 15.4 18.8 3.4 11.33 3 Typha latifolia tall cattail 16.1 16.2 0.1 0.33 3 Baccharissalicifoiia mulefat 16.2 16.7 0.5 1.67 3 Artemisia douglasiana California mugwort 16.7 17 0.3 1.00 3 Artemisia douglasiana California mugwort 17.35 17.65 0.3 1.00 3 Baccharis salicifolia mulefat 17.2 ' 18.5 1.3 4.33 3 Scirpus robustus prairie bulrush 17.1 17.3 0.2 0.67 3 Oenothera elata ssp. hirsutissima evening primrose 18.79 19.52 0.73 2.43 3 Artemisia douglasiana California mugwort 19.5 19.56 0.06 0.20 3 Anemopsis californica yerba mansa 19.55 . 19.58 0.03 0.10 3 Salixlasiolepis arroyo willow 19.52 19.79 0.27 0.90 3 bare ground bare ground 19.79 20 0.21 0.70 3 Oenothera elata ssp. hirsutissima evening primrose 20 20.35 0.35 1.17 3 bare ground bare ground 20.35 20.54 0.19 0.63 3 Oenothera elata ssp. hirsutissima evening primrose 20.54 20.9 0.36 1.20 3 Artemisia douglasiana California mugwort 20.9 21 0.1 0.33 3 bare ground bare ground 21 21.23 0.23 0.77 3 Artemisia douglasiana California mugwort 21.23 21.75 0.52 1.73 3 litter litter 21.75 21.95 0.2 0.67 3 Pluchea odorata salt marsh fleabane 21.95 22.14 0.19 0.63 3 litter . litter 22.14 22.56 0.42 1.40 3 Pluchea odorata salt marsh fleabane 22.56 22.66 0.1 0.33 3 litter litter 22.66 . 22.92 0.26 0.87 3 Oenothera elata ssp. hirsutissima evening primrose 22.92 22.93 0.01 0.03 3 Artemisia douglasiana California mugwort 23 23.15 0.15 0.50 3 Salixlasiolepis arroyo willow 23.15 23.55 0.4 1.33 3 Artemisia paimeri San Diego sagewort 23.4 23.47 0.07 0.23 3 Ambrosia psilostachya western ragweed 23.47 23.85 0.38 1.27 3 Artemisia douglasiana California mugwort 23.85 24.3 0.45 1.50 W3 Salixiasiolepis arroyo willow 24.3 25.54 1.24 4.13 5 of 15 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 S 3 litter litter 25.54 26 0.46 1.53 3 0enothera elata ssp. hirsutissima evening primrose 26 26.1 0.1 0.33 3 Ambrosia psiostachya western ragweed 26.1 26.25 0.15 0.50 3 litter litter 26.25 26.5 0.25 0.83 3 Oenofhera elata ssp. hirsutissima evening primrose 26.5 26.64 0.14 0.47 3 Artemisia palmeri San Diego sagewort 26.64 26.72 0.08 0.27 3 Salix lasiolepis arroyo willow 26.72 27.15 0.43 1.43 3 Polypogormonospeliensis rabbitfoot grass 27.15 27.18 0.03 0.10 3 bare ground bare ground 27.18 28.5 1.32 4.40 3 Artemisia douglasiana California mugwort 28.5 30 1.5 5.00 3 Salix lasiolepis arroyo willow 26.65 29.68 3.03 10.10 4 rock rock 0 0.5 0.5 1.67 4 Scirpus robustus prairie bulrush 0.5 0.75 0.25 0.83 4 Salicornia virginica - pickleweed 0.54 0.55 0.01 0.03 4 Salix gooddingii black willow 0.7 3 2.3 7.67 4 Salicornia virginica pickleweed 0.8 0.81 0.01 0.03 4 Rubus ursinus California blackberry 1 1.15 0.15 0.50 4 Bacchanis salicifolia mulefat 2.3 2.75 0.45 1.50 4 Pluchea odorata salt marsh fleabane 2.97 3.1 0.13 0.43 4 bare ground bare ground 3.1 3.3 0.2 0.67 4 Rubus ursinus California blackberry 3.3 3.9 0.6 2.00 4 Salix/asiolepis arroyo willow 3.4 3.7 0.3 1.00 4 Picnisechioides bristly ox-tongue 3.85 3.9 0.05 0.17 4 Heliotropium curassavicum salt heliotrope 3.86 4.05 0.19 0.63 4 Salix lasiolepis arroyo willow 4.05 4.25 0.2 0.67 4 litter litter 4.25. 4.42 0.17 0.57 4 Rubus ursinus California blackberry 4.42 4.47 0.05 0.17 4 Salixlasiolepis . arroyo willow 4.47 4.65 0.18 0.60 4 Rubus ursinus California blackberry 4.53 4.7 0.17 0.57 4 litter, litter 4.7 4.81 0.11 0.37 4 Rubus ursinus California blackberry 4.81 4.94 0.13 0.43 4 Salixlasiolepis arroyo willow '4.94 5.01 0.07 0.23 4 bare ground bare ground 5.01 5.15 0.14 0.47 4 Polypogon monospeliensis rabbitfoot grass 5.15 5.45 0.3 1.00 4 oenothera elata ssp. hirsutissima evening primrose 5.37 5.48 0.11 0.37 4 Epiobiumciliatum willow herb 545 5.5 0.05 0.17 4 litter litter 5.5 5.67 0.17 0.57 4 Oenothera elata ssp. hirsutissima evening primrose 5.67 5.9 0.23 0.77 4 litter litter 5.9 6.2 0.3 1.00 4 Salixlasiolepis arroyo willow 6.2 6.25 0.05 0.17 4 litter litter 6.25 6.5 0.25 0.83 4 Pluchea odorata salt marsh fleabane 6.5 6.7 0.2 ' 0.67 4 Rubus ursinus California blackberry , 6.65 6.72 0.07 0.23 4 litter litter 6.72 .7.06 0.34 1.13 4 Polypogonmonospeliensis rabbitfoot grass 7.06 7.22 0.16 0.53 4 Salixlasiolepis . arroyo willow 7.3 7.75 0.45 1.50 W 4 Picris echioides bristly ox-tongue 7.5 7.8 0.3 1.00 6 of 15 Cannon Road Wetland Mitigation Sil Botanical Monitoring Raw Data October 2002 Rubus ursinus California blackberry 7.75 Salix lasiolepis arroyo willow 7.9 Pluchea odorata salt marsh fleabane 8.15 litter litt er 8.2 bare ground bare ground 8.9 Baccharis salicifolia mulefat 8.9 Pluchea odorata salt marsh fleabane 9.05 Anemopsis califocnica yerba mansa 9.57 litter litt er 9.67 Polypogon monospeliensis rabbitfoot grass 9.93 litter litt er 9.96 Salix lasiolepis arroyo willow, 10.3 Artemisia douglasiana California mugwort 10.71 Pluchea odorata salt marsh fleabane 11.12 Pluchea odorata salt marsh fleabane 11.35 Pluchea odorata salt marsh fleabane 11.95 Typha lafifolia tall cattail 12.05 Scirpus californicus California bulrush 13.5 Pluchea odorata salt marsh fleabane 16.95 Eleocharis sp. spike-rush 17.4 Salix lasiolepis arroyo willow 17.6 Oenothera elata ssp. hirsutissima evening primrose 18.25 Oenothera elata ssp. hirsutissima evening primrose 18.78 Baccharis salicifolia mulefat 18.65 Pluchea odorata salt marsh fleabane 18.9 Baccharis salicifolia mulefat 19 Scirpus robustus prairie bulrush 19.07 Pluchea odorata salt marsh fleabane 19.22 Scirpus robustus prairie bulrush 19.45 Salix lasiolepis arroyo willow 19.67 Pluchea odorata salt marsh fleabane 19.65 Baccharis salicifolia mulefat 19.75 Salix lasiolepis arroyo willow 19.83 Pluchea odorata salt marsh fleabane 19.89 Salix lasiolepis arroyo willow 20.1 Picris echioides bristly ox-tongue 20.05 Scirpus robustus prairie bulrush 20.15 Picris echioides bristly ox-tongue 20.27 Baccharis salicifolia mulefat 20.35 Pluchea odorata salt marsh fleabane 20.45 Salix lasiolepis arroyo willow 20.5 Ambrosia psilostachya western ragweed 21 Pluchea odorata salt marsh fleabane 21.3 Scirpus robustus prairie bulrush 21.6 Ambrosia psilostachya western ragweed 21.67 bare ground bare ground 21.75 Pluchea odorata salt marsh fleabane 21.8 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 S 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 8.2 0.45 1.50 8.15 0.25 0.83 8.2 0.05 0.17 8.9 0.7 2.33 9 0.1 0.33 9.6 0.7 2.33 9.1 0.05 0.17 9.67 0.1 0.33 9.93 0.26 0.87 9.96 0.03 0.10 10.3 0.34 1.13 12.4 2.1 7.00 10.85 0.14 0.47 11.25 0.13 0.43 11.65 0.3 1.00 12.5 0.55 1.83 17.2 5.15 17.17 16 2.5 8.33 17.8 0.85 2.83 17.55 0.15 0.50 18.7 1.1 3.67 18.27 0.02 0.07 18.8 0.02 0.07 18.9 0.25 0.83 19 0.1 0.33 19.2 0.2 0.67 19.3 0.23 0.77 19.5 0.28 0.93 19.7 0.25 0.83 19.8 0.13 0.43 19.75 0.1 0.33 19.85 0.1 0.33 19.89 0.06 0.20 20.25 0.36 1.20 20.2 0.1 0.33 20.13 0.08 0.27 20.45 0.3 1.00 20.4 0.13 0.43 20.5 0.15 0.50 20.9 0.45 1.50 21.75 1.25 4.17 21.25 0.25 0.83 21.48 0.18 0.60 21.61 0.01 0.03 21.68 0.01 0.03 21.8 0.05 0.17 22.15 0.35 1.17 7 of 15 Cannon Road Wetland Mitigation Site • Botanical Monitoring Raw Data. October 2002 . 4 Baccharis salicifolia . mulefat 22.15 22.45 0.3 1.00 4 Pluchea odorata salt marsh fleabane :22.25 22.5 0.25 0.83 4 litter litter 22.5 22.7 0.2 0.67 4 Pluchea odorata salt marsh fleabane 22.7 23.02 0.32 1.07 4 Scirpus robustus prairie bulrush 23.02 23.15 0.13 0.43 4 litter litter 23.15.. 23.3 0.15 0.50 4 Pluchea odorata salt marsh fleabane 23.3 23.42 0.12 0.40 4 litter litter 23.42 24.15 0.73 2.43 4 Scirpus robustus prairie bulrush 24.15 24.35 0.2 0.67 4 Salixlasiolepis arroyo willow 24.3 24.7 0.4 1.33 4 Baccharis salicifolia . mulefat 24.35 24.55 0.2 0.67 4 Pluchea odorata salt marsh fleabane 24.57 24.8 0.23 0.77 4 Typha latifolia tall cattail 24.7 25.15 0.45 1.50 4 Scirpus robustus prairie bulrush 25.1 25.43 0.33 1.10 4 Pluchea odorata salt marsh fleabane 25 25.15 0.15 0.50 4 Ambrosia psiostachya . western ragweed 25.4 255 0.1 0.33 4 Artemisia douglasiana California mugwort 25.47 25.8 0.33 1.10 4 Pluchea odorata salt marsh fleabane 25.6 25.83 0.23 0.77 4 Baccharis salicifolia mulefat 25.4 25.6 0.2 0.67 4 Typha latifolia tall cattail 25.8 26.5 0.7 2.33 4 Pluchea odorata salt marsh fleabane 26.08 26.16 0.08 . 0.27 4 Pluchea odorata salt marsh fleabane 26.38 26.44 0.06 0.20 4 Pluchea odorata • salt marsh fleabane 26.5 26.65 0.15 0.50 • 4 Scirpus robustus prairie bulrush 26.55 26.75 0.2 0.67 4 litter litter 26.75 26.87 0.12 0.40 4 Pluchea odorata salt marsh fleabane 26.87 26.95 0.08 0.27 4 Scirpus robustus prairie bulrush 26.87 27.1 0.23 0.77 4 Salix lasiolepis arroyo willow 26.99 27.2 0.21 0.70 Polypogon monospeliensis rabbitfoot grass 27.2 27.25 0.05 0.17 4 Pluchea odorata salt marsh fleabane 27.23 27.43 0.2 0.67 4 litter litter • 27.43 27.51 0.08 0.27 4 Salix lasiolepis arroyo willow 27.51 28.4 0.89 2.97 4 Polypogon monospeliensis rabbitfoot grass 27.8 27.9 0.1 0.33 4 Typha latifolia tall cattail 28.2 28.45 0.25 0.83 4 litter litter . 28.45 28.73 0.28 0.93 4 Scirpus robustus prairie bulrush 28.73 29 0.27 0.90 4 litter • litter • 29 29.4 0.4 1.33 4 Pluchea odorata salt marsh fleabane 29.4 29.52 0.12 0.40 4 Typha latifolia tall cattail • 29.45 30 0.55 1.83 4 Scirpus californicus • California bulrush 29.6 30 0.4 1.33 5 litter litter 0 0.3 0.3 1.00 5 Artemisiapalmeri San Diego sagewort • 0:3 0.4 0.1 0.33 5 Oenothera elata ssp. hirsutissima evening primrose 0.31 0.38 0.07 0.23 5 litter litter 0.4 0.6 0.2 0.67 5 bare ground bare ground 0.6 1.8 1.2 4.00 5 Oenothera elata ssp. hirsutissima evening primrose 1.8 1.99 0.19 0.63 5 litter litter 1.99 2.15 0.16 0.53 8 of 15 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 . 5 Oenothera elata ssp. hirsutissima evening primrose 2:15 2.16 0.01 0.03 5 litter litter 2.16 2.3 0.14 0.47 5 Oenothera elata ssp. hirsutissima evening primrose 2.3 2.31 0.01 0.03 5 litter litter 2.31 2.72 0.41 1.37 5 Oenothera elata ssp. hirsutissima evening primrose 2.72 2.73 0.01 0.03 5 litter litter 2.73 2.8 0.07 0.23 5 Oenothera elata ssp. hirsutissima evening primrose 2.8 2.82 0.02 0.07 5 litter litter 2.82 3 0.18 0.60 5 Salix gooddingii black willow :3 5 2 6.67 5 Artemisia palmeri San Diego sagewort 3.15 3.4 0.25 0.83 5 Artemisia douglasiana California mugwort 3.66 3.9 0.24 0.80 Ambrosia psiostachya western ragweed 4.15 4.4 0.25 0.83 5 Polypogon monospeliensis rabbitfoot grass 4.41 4.7 0.29 0.97 5 Anemopsis californica yerba mansa 4.79 4.88 0.09 0.30 5 Polypogon monospeliensis rabbitfoot grass 4.88 5.41 0.53 1.77 5 Anemopsis californica yerba mansa 4.98 5 0.02 0.07 5 bare ground bare ground 5.41 5.6 0.19 0.63 5 Anemopsis californica yerba mansa 5.6 5.63 0.03 0.10 5 bare ground bare ground 5.63 5.69 0.06 0.20 5 Polypogon monospeliensis rabbitfoot grass 5.69 6.83 1.14 3.80 5 Anemopsis californica yerba mansa 6.19 6.23 0.04 0.13 5 Baccharis salicifolia mulefat 6.49 6.65 0.16 0.53 5 bare ground, bare ground 6.83 7.15 0.32 1.07 S 5 Polypogon monospeliensis rabbitfoot grass 7.15 7.6 0.45 1.50 5 Pluchea odorata salt marsh fleabane 7.38 7.6 0.22 0.73 5 litter litter 7.6 8.15 0.55 1.83 5 Anemopsis californica yerba mansa 8.15 8.25 . 0.1 0.33 5 Pluchea odorata salt marsh fleabane 8.18 8.25 0.07 0.23 5 Anemopsis californica yerba mansa 8.21 8.23 0.02 0.07 5 Salixlasiolepis arroyo willow 8.3 8.63 0.33 1.10 Ambrosia psiostachya western ragweed 8.38 8.65 0.27 0.90 5 Rubus ursinus California blackberry 8.61 8.91 0.3 1.00 5 litter litter 8.91 9.02 0.11 0.37 5 Salix/asiolepis arroyo willow 9.4 10.45 1.05 3.50 5 Rubus ursinus California blackberry 9.02 9.94 0.92 3.07 5 Scirpusmicrocarpus small-fruited bulrush 10 10.4 0.4 1.33 5 Rubus ursinus California blackberry 10.45 10.46 0.01 0.03 5 litter litter 10.46 11.25 0.79 2.63 5 Scirpusmicrocarpus small-fruited bulrush 11.25 12.18 0.93 3.10 5 Pluchea odorata salt marsh fleabane 11.26 11.4 0.14 0.47 5 Oenothera elata ssp. hirsutissima evening primrose 11.76 11.77 0.01 0.03 5 bare ground bare ground 12.18 12.5 0.32 1.07 5 Polypogon monospeliensis rabbitfoot grass 12.5 13 0.5 1.67 5 Pluchea odorata salt marsh fleabane. 12.8 13 0.2 0.67 5 litter litter 13 13.12 0.12 0.40 . 5 Ambrosia psilostachya western ragweed 13.12 13.2 0.08 0.27 5 Salixgooddingii black willow 13.2 13.6 0.4 1.33 9 of 15 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 . 5 Oenothera elata ssp. hirsutissima evening primrose 13.35 1 5 Salix lasiolepis arroyo willow 13.33 1 5 Ambrosia psiostachya western ragweed 13.4 1 5 litter litter 13.5 1 5 Ambrosia psilosfachya western ragweed 13.7 1 5 Oenothera elata ssp. hirsutissima - evening primrose 13.95 5 litter litter 14.12 1 5 Baccharis salicifolia mulefat 14.5 1 5 Artemisia douglasiana California mugwort 14.9 5 litter litter 15 1 5 Salix lasiolepis arroyo willow 15.4 1 5 Pluchea odorata salt marsh fleabane 16.3 1 5 litter litter 17.5 11 5 Oenothera elata ssp. hirsutissima evening primrose 18.35 11 5 Pluchea odorata salt marsh fleabane 18.4 11 5 litter litter 18.58 1 5 Pluchea odorata salt marsh fleabane 18.7 11 5 Scirpus robustus prairie bulrush 18.76 5 litter litter 19 5 Pluchea odorata salt marsh fleabane 19.18 1 5 litter litter 19.2 1 5 Typhalatifolia tall cattail 19.4 2( 5 Scirpus californicus California bulrush 19.7 2 5 Artemisia douglasiana California mugwort 20.85 2 5 Salix lasiolepis arroyo willow. 20.6 2( 5 Salix lasiolepis arroyo willow 21.1 2 5 bare ground bare ground 21.48 2 5 Artemisia douglasiana California mugwort 21.6 2 5 Pluchea odorata salt marsh fleabane 21.8 5 Eleocharis sp. spike-rush 22 2 5 Pluchea odorata salt marsh fleabane 22.05 2 5 Salix lasiolepis arroyo willow 22.2 2 5 Baccharis salicifolia mulefat 22.6 2 5 Baccharis sailcifolia mulefat 23 2 5 Oenothera elata ssp. hirsutissima evening primrose 23.1 2 5 litter litter 23.35 2 5 Artemisia douglasiana California mugwort 23.55 2 5 Salix gooddingll black willow 23.65 5 Oenothera elata ssp. hirsutissima evening primrose 24.15 2 5 Salix lasiolepis arroyo willow 24.44 2 5 Polypogon monospellensis rabbitfoot grass 24.5 2 5 Pluchea odorata salt marsh fleabane 24.65 2 5 Artemisia douglasiana California mugwort 24.9 2 5 Salix exigua narrow-leaved willow 25 2 5 Oenothera elata ssp. hirsutissima evening primrose 25.48 2 5 Salix lasiolepis arroyo willow 25.7 2 5 Pluchea odorata salt marsh fleabane 26.25 21 - 10 af 15 3.4 0.05 0.17 3.4 0.07 0.23 3.5 0.1 0.33 3.7 0.2 0.67 .12 0.42 1.40 14 0.05 0.17 4.5 0.38 1.27 4.9 0.4 1.33 15 0.1 0.33 5.4 0.4 1.33 7.5 2.1 7.00 6.5 0.2 0.67 3.35 - 0.85 2.83 3.53 0.18 0.60 3.58 0.18 0.60 8.7 0.12 0.40 3.95 0.25 0.83 19 0.24 0.80 3.18 0.18 0.60 9.2 0.02 0.07 9.4 0.2 0.67 ).85 1.45 4.83 0.1 0.4 1.33 1.48 0.63 2.10 ).75 0.15 0.50 1.25 0.15 0.50 1.6 0.12 0.40 1.93 0.33 1.10 22 0.2 0.67 2.2 0.2 0.67 3.35 1.3 4.33 2.6 0.4 1.33 2.8 0.2 0.67 3.04 0.04 0.13 3.3 0.2 0.67 3.55 0.2 0.67 4.2 0.65 2.17 25 1.35 4.50 .47 0.32 1.07 .48 0.04 0.13 .62 0.12 0.40 4.9 0.25 0.83 .95 0.05 0.17 5.9 0.9 3.00 5.5 0.02 0.07 6.2 0.5 1.67 3.45 0.2 0.67 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 . 5 litter litter 26.45 26.55 0.1 0.33 5 Pluchea odorata salt marsh fleabane 26.55 26.66 0.11 0.37 5 Salix exigua narrow-leaved willow 26.6 27.8 1.2 4.00 5 Pluchea odorata salt marsh fleabane 26.9 27.15 0.25 0.83 5 Artemisia douglasiana California mugwort 27.45 27.52 0.07 0.23 5 Pluchea odorata salt marsh fleabane 27.7 29.4 1.7 5.67 5 Typha latifolia tall cattail 28.2 28.26 0.06 0.20 5 Scirpus robustus prairie bulrush 28.13 28.22 0.09 0.30 5 . Typha latifolia tall cattail 28.9 29.2 0.3 1.00 5 Typha latifolia tall cattail 29.4 30 1 0.6 2.00 6 Baccharis salicifolia mulefat 0 0.73 0.73 2.43 6 Salixgooddingii black willow 0.2 4.16 3.96 13.20 6 Artemisia douglasiana California mugwort 2.15 2.32 0.17 0.57 6 Scirpus robustus prairie bulrush 3.72 3.81 0.09 0.30 6 Salix lasiolepis arroyo willow 3.85 4.65 0.8 2.67 6 Scirpus robustus prairie bulrush 4.65 4.8 0.15 0.50 6 Salix lasiolepis . arroyo willow 4.8 5.75 0.95 3.17 6 Scirpus robustus prairie bulrush 4.96 5.92 0.96 3.20 6 Pluchea odorata salt marsh fleabane 5.2 5.25 0.05 0.17 6 Pluchea odorata salt marsh fleabane 5.65 5.72 0.07 0.23 6 Salix lasiolepis arroyo willow 5.58 5.9 0.32 1.07 6 Juncus acutus ssp. leopoldii southwestern spiny rush 5.72 5.9 0.18 0.60 6 bare ground bare ground 5.92 6.13 0.21 0.70 6 Typha latifolia tall cattail 6.13 8.42 2.29 7.63 6 Scirpus californicus California bulrush 7.95 7.97 0.02 0.07 6 bare ground bare ground 8.42 8.56 0.14 0.47 6 Pluchea odorata salt marsh fleabane 8.56 8.63 0.07 0.23 6 Typha latifolia tall cattail 8.63 8.78 0.15 0.50 6 Pluchea odorata salt marsh fleabane 8.77 9.1 0.33 1.10 6 litter litter 9.1 9.2 0.1 0.33 6 Salix lasiolepis arroyo willow 9.2 10.4 1.2 4.00 6 Pluchea odorata salt marsh fleabane 10 10.49 0.49 1.63 6 Typha latifolia tall cattail 9.65 9.75 0.1 0.33 6 Artemisia douglasiana California mugwort 10.51 10.62 0.11 0.37 6 Picrisechioides bristly ox-tongue 10.4 10.5 0.1 0.33 6 litter litter 10.62 10.85 0.23 0.77 6 Oenothera elata ssp. hirsutissima evening primrose 10.85 10.88 0.03 0.10 6 Salix lasiolepis arroyo willow 10.88 11.54 0.66 2.20 6 Artemisia douglasiana California mugwort 11.49 11.62 0.13 0.43 6 bare ground bare ground 11.62 11.87 0.25 0.83 6 Salix lasiolepis arroyo willow 11.87 12.65 0.78 2.60 6 Artemisia douglasiana California mugwort 12.28 12.91 0.63 2.10 6 Salix lasiolepis arroyo willow 12.7 14.06 1.36 4.53 6 Eleocharis sp. spike-rush 13.72 13.77 0.05 0.17 6 Artemisia palmeri San Diego sagewort 13.91 14.04 0.13 0.43 . 6 litter litter 14.06 14.2 0.14 0.47 6 Oenothera elata ssp. hirsutissima evening primrose 14.3 14.55 0.25 0.83 11 of 15 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 6 Salix lasiolepis arroyo willow 14.2 14.7 0.5 1.67 W 6 Artemisia douglasiana California mugwort 14.7 14.82 0.12 0.40 6 bare ground bare ground 14.82 15.05 0.23 0.77 6 Baccharis salicifolia mulefat 15.05 15.18 0.13 0.43 6 litter litter 15.18 15.9 0.72 2.40 6 Salix lasiolepis arroyo willow 15.9 16.05 0.15 0.50 6 0enothera elata ssp. hirsutissima evening primrose 15.95 15.97 0.02 0.07 6 Pluchea odorata salt marsh fleabane 16.05 16.1 0.05 0.17 6 Salix lasiolepis arroyo willow 16.1 16.25 0.15 0.50 6 bare ground bare ground 16.25 16.7 0.45 1.50 6 Oenothera elata ssp. hirsutissima evening primrose 16.7 16.73 0.03 0.10 6 Scirpus robust us prairie bulrush 16.73 16.75 0.02 0.07 6 litter litter 16.75 17.26 0.51 1.70 6 Salix lasiolepis arroyo willow 17.26 18.4 1.14 3.80 6 Artemisia douglasiana. California mugwort 17.75 17.98 0.23 0.77 6 Oenothera elata ssp. hirsutissima evening primrose 18.25 18.27 0.02 0.07 6 Picris echioides bristly ox-tongue 18.4 18.44 0.04 0.13 6 Ambrosia psilostachya western ragweed 18.44 18.46 0.02 0.07 6 litter litter 18.46 18.8 0.34 1.13 6 Pluchea odorata salt marsh fleabane 18.8 18.83 0.03 0.10 6 Oenothera elata ssp. hirsutissima evening primrose 18.83 18.85 0.02 0.07 6 bare ground bare ground 18.85 19.28 0.43 1.43 6 Pluchea odorata salt marsh fleabane 19.28 19.35 0.07 0.23 6 Salix lasiolepis arroyo willow 19.35 19.75 0.4 1.33 6 Pluchea odorata salt marsh fleabane 19.75 19.8 0.05 0.17 6 litter litter 19.8 20.1 0.3 1.00 6 Salix lasiolepis arroyo willow 20.1 20.35 0.25 0.83 6 litter litter 20.35 20.5 0.15 0.50 6 Salix lasiolepis - arroyo willow 20.5 20.81 0.31 1.03 6 bare ground bare ground 20.81 21.05 0.24 0.80 6 Salix lasiolepis arroyo willow . 21.05 21.5 0.45 1.50 6 bare ground bare ground 21.5 21.9 0.4 1.33 6 Baccharis salicifolia mulefat 21.9 23.14 1.24 4.1.3 6 Salix lasiolepis . arroyo willow 22.75 23.15 0.4 1.33 6 Artemisia douglasiana California mugwort 23.2 23.26 0.06 0.20 6 Oenothera elata ssp. hirsutissima evening primrose 23.26 23.35 0.09 0.30 6 Salix lasiolepis arroyo willow 23.35 23.85 0.5 1.67 6 Artemisia douglasiana ' California mugwort 23.8 24.4 0.6 2.00 6 Salix lasiolepis arroyo willow 24.2 24.4 0.2 0.67 6 litter litter 24.4 24.9 0.5 1.67 6 Salix gooddingli black willow 24.9 26.37 1.47 4.90 6 Salix lasiolepis arroyo willow 25.1 25.45 0.35 1.17 6 Pluchea odorata salt marsh fleabane 25.8 25.85 0.05 0.17 6 Salix lasiolepis arroyo willow 26.25 28.45 2.2 7.33 6 Scirpus robustus prairie bulrush 27.8 28 0.2 0.67 6 Pluchea odorata salt marsh fleabane 28.12 28.13 0.01 0.03 6 Typhalatifolia tall cattail 28.45 30 1.55 5.17 120f15 I C Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 - 6 Salix lasiolepis arroyo willow 28.8 29.15 0.35 1.17 W 6 Scirpus californicus California bulrush 29.45 30 0.55 1.83 6 Salix lasiolepis arroyo willow 29.8 29.85 0.05 0.17 Heights from Transects 1 Salix lasiolepis arroyo willow 2.3 container 1 Salix exigua narrow-leaved willow 1.6 container 1 Sallx lasiolepis ' arroyo willow 2.8 container 1 Baccharis salicifolia mulefat 1.5 container 1 Baccharis salicifolia mulefat 2.9 container 1 Baccharis salicifolia mulefat 1.8 container 1 Baccharis salicifolia mulefat 2.1 container 1 Salix lasiolepis arroyo willow 2.2 container 2 Salix lasiolepis arroyo willow 1.6 container 2 Baccharis salicifolia mulefat 1.7 container 2 Populus fremon lii Fremont cottonwood 1.7 container 2 Baccharis salicifolia mulefat 2.8 container 2 Salix lasiolepis arroyo willow 2.4 container 2 Baccharis salicifolia mulefat 2.7 container 2 Salix gooddingii black willow 3.7 container 2 Baccharis salicifolia mulefat 1.6 container 2 Baccharis salicifolia mulefat 1.8 container 2 Salix lasiolepis - arroyo willow 1.6 container 2 Salix lasiolepis arroyo willow - 2.7 container 3 Salix gooddingii black willow . 2.4 container 3 Salix lasiolepis arroyo willow 2.5 container 3 Baccharis salicifolia mulefat 2.2 container • 3 Baccharis salicifolia mulefat 1.5 container 3 Baccharis salicifolia mulefat 1.9 container 3 Baccharis salicifolia mulefat 2.3 container 3 Salix gooddingii black willow 4.1 container 3 Baccharis salicifolia mulefat 2.3 container 3 Salix lasiolepis arroyo willow 3 container 3 Salix lasiolepis arroyo willow 2.8 container 3 Salix gooddingii black willow 2.6 container 3 Salix lasiolepis arroyo willow 2.3 container 3 Salix gooddingii black willow 2.2 container 3 Salix lasiolepis arroyo willow 2.5 container 3 Salix exigua narrow-leaved willow 2.1 container 4 Salix gooddingii black willow 3.3 container 4 Baccharis salicifolia mulefat 2.4 container 4 Baccharis salicifolia mulefat 1.4 container 4 Salix lasiolepis arroyo willow 2.3 container 4 Salix lasiolepis arroyo willow 3.5 container 4 Salix gooddingii black willow 3.2 container 4 Salix lasiolepis arroyo willow 2.6 container 4 Salix gooddingii black willow 3 container 4 Salix lasiolepis arroyo willow 4.4 container 13 of 15 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 5 Salix gooddingii black willow 2.8 container W 5 Salix gooddingii black willow 3.6 container 5 Baccharis salicifolia mulefat 1.3 container 5 Salix gooddingii black willow 2.4 container 5 Baccharis salicifolia mulefat 1.5 container 5 Baccharis salicifolia mulefat 1.8 container 5 Salix gooddingii black willow 2.4 container 5 Salix gooddingii black willow 2.3. container 5 Salix lasiolepis arroyo willow 3.6 container. 5 Salix gooddingii black willow 4.1 container 5 Salix lasiolepis arroyo willow 2.7 container 5 Salix gooddingii black willow 3.5 container 5 Salix gooddingii black willow 3.1 container 5 Salix exigua narrow-leaved willow 2.6 . container 5 Salix exigua narrow-leaved willow 3.5 container 5 Salix exigua narrow-leaved willow 2.4 container 6 Baccharis salicifolia mulefat 3 container 6 Salix gooddingii black willow 4.2 container 6 Baccharis salicifolia mulefat 2.4 container 6 Baccharis salicifolia mulefat 2 container 6 Salix lasiolepis arroyo willow 4 container 6 Salix lasiolepis arroyo willow 4.1 container 6 Salix lasiolepis arroyo willow 4.2 container 6 Salix lasiolepis arroyo willow 2.4 container 6 Salix exigua narrow-leaved willow 2.7 container 6 Salix lasiolepis arroyo willow 4.7 container 6 Populus fremonfii Fremont cottonwood 2.3 container 6 Salix lasiolepis arroyo willow 3.4 container 6 Baccharis salicifclia mulefat 1.2 container 6 Baccharis salicifolia mulefat 2 container 6 Salix gooddingii black willow 2.3 container 6 Populus fremonfii Fremont cottonwood 2.1 container 6 Salix lasiolepis arroyo willow 4 container Extra Heights not from Transects Salix exigua narrow-leaved willow 2.5 container Salix exigua . narrow-leaved willow 1.7 container Salix exigua . narrow-leaved willow 2.5 container Salix exigua narrow-leaved willow 3.3 container Salix exigua narrow-leaved willow 2.7 container Salix exigua narrow-leaved willow 2.5 container Sambucus mexicana elderberry 2 container Sambucus mexicana elderberry 2 container Populus fremontii Fremont cottonwood 3.1 container Populus fremontil Fremont cottonwood 1.8 container Populus fremontil Fremont cottonwood 0.9 container Populus fremontii Fremont cottonwood 2.2 container Sambucus mexicana elderberry 0.1 container 14 of 15 Cannon Road Wetland Mitigation Site Botanical Monitoring Raw Data October 2002 . Sambucus mexicana elderberry 0.4 container Sambucus mexicana elderberry 1.8 container Populus fremontll Fremont cottonwood 2.5 container 15 of 15 Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 . Percent Species • Transect Species Common Name Begin End Cover Cover Cover (%) 1 Ambrosia psilostachya western ragweed 8.95 9.05 0.1 0.33 2.5 1 Ambrosia psilostachya western ragweed 15.05 15.13 0.08 0.27- 1 Ambrosia psilostachya western ragweed 15.59 16 0.41 1.37 1 Ambrosia psilostachya western ragweed 16.94 17.15 0.21 0.70 2 Ambrosia psilostachya western ragweed 5.65 6.33 0.68 2.27 2 Ambrosia psilostachya western ragweed 24.92 24.94 0.02 0.07 2 Ambrosia psilostachya western ragweed 25.3 25.55 0.25 0.83 2 Ambrosia psilostachya western ragweed 26.1 26.78 0.68 2.27 2 Ambrosia psilostachya western ragweed 27.2 27.3 0.1 0.33 3 Ambrosia psilostachya western ragweed 23.47 23.85 0.38 1.27 3 Ambrosia psilostachya western ragweed 26.1 26.25 0.15 0.50 4 Ambrosia psilostachya western ragweed 21 21.25 0.25 0.83 4 Ambrosia psilostachya western ragweed 21.67 21.68 0.01 0.03 4 Ambrosia psilostachya western ragweed 25.4 25.5 0.1 0.33 5 Ambrosia psilostachya western ragweed 4.15 4.4 0.25 0.83 5 Ambrosia psilostachya western ragweed 8.38 8.65 0.27 0.90 5 Ambrosia psilostachya western ragweed 13.12 13.2 0.08 0.27 5 Ambrosia psilostachya western ragweed 13.4 13.5 0.1 0.33 5 Ambrosia psilostachya western ragweed 13.7 14.12 0.42 1.40 6 Ambrosia psilostachya western ragweed 18.44 18.46 0.02 0.07 1 Anemopsisca/ifornica yerba mansa 16.94 17.05 0.11 0.37 1.8 . 1 Anemopsis ca/ifornica yerba mansa 18.19 18.22 0.03 0.10 2 Anemopsis cailfomnica yerba mansa 12.4 13.5 1.1 3.67 • 2 Anemopsis ca/ifornica yerba mansa 14.15 14.7 0.55 1.83 2 Anemopsis ca/ifornica yerba mansa 22.25 22.51 0.26 0.87-- 2 Anemopsis californica yerba mansa 23.44 23.46 0.02 0.07 2 Anemopsis californica yerba mansa 23.57 23.77 0.2 0.67 2 Anemopsis californica yerba mansa 25.95 26 0.05 0.17 3 Anemopsis californica yerba mansa 4.31 4.34 0.03 0.10 3 Anemopsis californica yerba mansa 4.9 4.93 0.03 0.10 3 Anemopsis ca/ifornica yerba mansa 7 7.12 0.12 0.40 3 Anemopsis ca/ifornica • yerba mansa 7.98 8.21 0.23 0.77 3 Anemopsis ca/ifornica yerba mansa 9.06 9.13 0.07 0.23 3 Anemopsis ca/ifornica yerba mansa 19.55 19.58 0.03 0.10 4 Anemopsis ca/ifornica yerba mansa 9.57 9.67 0.1 0.33 5 Anemopsis ca/ifornica yerba mansa 4.79 4.88 0.09 0.30 Anemopsis ca/ifornica yerba mansa 4.98 5 0.02 0.07 5 Anemopsisca/ifornica yerba mansa 5.6 5.63 0.03 0.10 5 Anemopsiscalifornica yerba mansa 6.19 6.23 0.04 0.13 5 Anemopsis californica yerba mansa 8.15 8.25 0.1 0.33 5 Anemopsis californica yerba mansa 8.21 8.23 0.02 0.07 2 Artemisia douglasiana California mugwort 9.3 9.5 0.2 0.67 6.3 2 Artemisia douglasiana California mugwort 24.35 24.45 0.1 0.33 . 3 3 Artemisia douglasiana Artemisia douglasiana California mugwort California mugwort 3.49 4.34 3.76 4.36 0.27 0.02 0.90 0.07 I of 13 . 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 3 Artemisia douglasiana 4 Artemisia douglasiana 4 Artemisia douglasiana 5 Artemisia douglasiana 5 Artemisia douglasiana 5 Artemisia douglasiana 5 Artemisia douglasiana 5 Artemisia douglasiana 5 Artemisia douglasiana 5 Artemisia douglasiana 6 Artemisia douglasiana 6 Artemisia douglasiana 6 Artemisia douglasiana 6 Artemisia douglasiana 6 Artemisia douglasiana 6 Artemisia douglasiana 6 Artemisia douglasiana 6 Artemisia douglasiana 3 Artemisia pa/men 3 Artemisia pa/men 3 Artemisia pa/men 5 Artemisia pa/men 5 Artemisia pa/men 6 Artemisia pa/men 1 Baccharis pi/ularis 1 Baccharis sa/icifo/ia 1 Baccharis salicifolia . 1 Baccharis salicifo f/a 1 Baccharis salicifofia 0.63 0.77 2.17 0.60 1.10 0.17 0.13 0.03 0.83 2.43 0.13 1.00 1.00 0.20 0.33 1.73 0.50 1.50 5.00 0.47 1.10 0.80 0.33 2.10 1.10 2.17 0.17 0.23 0.57 0.37 0.43 2.10 0.40 0.77 0.20 2.00 0.23 0.23 0.27 0.33 0.83 0.43 0.03 1.23 0.37 2.50 0.83 0.4 0:0 6.7 Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 California mugwort 4.71 4.9 0.19 California mugwort 5.4 5.63 0.23 California mugwort 5.77 6.42 0.65 California mugwort 8.21 8.39 0.18 California mugwort 9.23 9.56 0.33 California mugwort 10.79 10.84 0.05 California mugwort 11.06 11.1 0.04 California mugwort 11.61 11.62 0.01 California mugwort 12.15 12.4 0.25 California mugwort 12.57 13.3 0.73 California mugwort 15.1 15.14 0.04 California mugwort 16.7 17 0.3 California mugwort 17.35 17.65 0.3 California mugwort 19.5 19.56 0.06 California mugwort 20.9 21 0.1 California mugwort 21.23 21.75 0.52 California mugwort 23 23.15 0.15 California mugwort 23.85 24.3 0.45 California mugwort 28.5 30 1.5 California mugwort 10.71 10.85 0.14 California mugwort 25.47 25.8 0.33 California mugwort 3.66 3.9 0.24 California mugwort 14.9 15 0.1 California mugwort 20.85 21.48 0.63 California mugwort 21.6 21.93 0.33 California mugwort 23.55 24.2 0.65 California mugwort 24.9 24.95 0.05 California mugwort 27.45 27.52 0.07 California mugwort' 2.15 2.32 0.17 California mugwort 10.51 10.62 0.11 California mugwort 11.49 11.62 0.13 California mugwort 12.28 12.91 0.63 California mugwort 14.7 14.82 0.12 California mugwort 17.75 17.98 0.23 California mugwort 23.2 23.26 0.06 California mugwort 23.8 24.4 0.6 San Diego sagewort 12.5 12.57 0.07 San Diego sagewort 23.4 ' 23.47 0.07 San Diego sagewort 26.64 26.72 0.08 San Diego sagewort 0.3 0.4 0.1 San Diego sagewort 3.15 3.4 0.25 San Diego sagewort 13:91 14.04 0.13 coyote bush 19.69 19.7 0.01 mulefat 0.15 0.52 0.37 mulefat 1.09 1.2 0.11 mulefat 19.1 19.85 0.75 mulefat 23.9 24.15 0.25 2 of 13 • Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 . 2 Baccharis salicifolia mulefat 6.01 6.03 0.02 0.07 2 Baccharis salicifolia mulefat 6.33 7.7 1.37 4.57 2 Baccharis salicifolia mulefat 8.7 9.95 1.25 4.17 2 Baccharis salicifolia mulefat 27.95 28.35 0.4 1.33 3 Baccharis salicifolia mulefat 5.79 5.95 0.16 0.53 3 Baccharis salicifolia mulefat 6.42 6.43 0.01 0.03 3 Baccharis salicifolia mulefat 10.55 10.6 0.05 0.17 3 Baccharis salicifolia mulefat 16.2 16.7 0.5 1.67 3 Baccharis salicifolia mulefat 17.2 18.5 1.3 4.33 4 Baccharis salicifolia mulefat 2.3 2.75 0.45 1.50 4 Baccharis salicifolia mulefat 8.9 9.6 0.7 2.33 4 Baccharis salicifolia mulefat 18.65 18.9 0.25 0.83 4 Baccharis salicifolia mulefat 19 19.2 0.2 0.67 4 Baccharis salicifolia mulefat 19.75 19.85 0.1 0.33 4 Baccharis salicifolia mulefat 20.35 20.5 0.15 0.50 4 Baccharis salicifolia mulefat 22.15 22.45 0.3 1.00 4 Baccharis salicifolia mulefat 24.35 24.55 0.2 0.67 • 4 Baccharis salicifolia mulefat 25.4 25.6 0.2 0.67 5 Baccharis salicifolia mulefat 6.49 6.65 0.16 0.53 5 Baccharis salicifolia mulefat 14.5 14.9 0.4 1.33 5 Baccharis salicifolia mulefat 22.6 22.8 0.2 0.67 5 Baccharis salicifolia mulefat 23 • 23.04 0.04 • 0.13 6 Baccharis salicifolia mulefat 0 0.73 0.73 2.43 6 Baccharis salicifolia mulefat 15.05 15.18 0.13 0.43 6 Baccharis salicifolia mulefat 21.9 23.14 1.24 4.13 1 bare ground bare ground 0 0.15 0.15 0.50 1 bare ground bare ground 0.52 1.09 0.57 1.90 1 bare ground bare ground 1.2 1.58 0.38 1.27 1 bare ground bare ground • 1.6 1.63 0.03 0.10 1 bare ground bare ground 2.01 2.78 0.77 2.57 1 bare ground bare ground 2.83 3.61 0.78 2.60 1 bare ground bare ground 3.78 4.3 0.52 1.73 1 bare ground bare ground 4.45 6 1.55 5.17 1 bare ground bare ground 6.38 7i 0.72 2.40 1 bare ground bare ground 7.6 7.69 0.09 0.30 1 bare ground . bare ground 7.81 7.93 0.12 0.40 1 bare ground bare ground 8.15 8.47 0.32 1.07 1 bare ground . bare ground 8.63 8.74 0.11 0.37 1 bare ground bare ground 9.25 10.33 1.08 3.60 1 bare ground bare ground 11.88 14.7 2.82 9.40 1 bare ground bare ground 14.73 15.05 0.32 1.07 1 bare ground bare ground 15.13 15.59 0.46 1.53 1 bare ground bare ground 16 16.38 0.38 1.27 1 bare ground bare ground 16.78 16.94 0.16 0.53 1 bare ground bare ground 17.19 17.25 0.06 0.20 lbare ground bare ground 17.37 17.48 0.11 0.37 1 bare ground bare ground 17.68 18.05 0.37 1.23 22.6 3o113 Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 . 1 bare ground bare ground 18.62 18.7 0.08 0.27 1 bare ground bare ground 19.9 21 1.1 3.67 1 bare ground bare ground 21.9 22.02 0.12 0.40 1 bare ground bare ground 22.4 22.65 0.25 0.83 1 bare ground bare ground 23.2 23.9 0.7 2.33 1 bare ground bare ground 24.15 24.6 0.45 1.50 1 bare ground bare ground 26.5 28 1.5 5.00 1 bare ground bare ground 28.3 30 1.7 5.67 2 bare ground bare ground 0 0.8 0.8 2.67 2 bare ground bare ground 1.2 1.32 0.12 0.40 2 bare ground bare ground 1.43 2.95 1.52 5.07 2 bare ground bare ground 2.98 3.3 0.32 1.07 2 bare ground bare ground 3.37 5.2 1.83 . 6.10 2 bare ground bare ground 7.7 8 0.3 1.00 2 bare ground bare ground 10.66 11 0.34 1.13 2 bare ground bare ground 26.87 27 0.13 0.43 2 bare ground bare ground 27.3 27.55 0.25 0.83 2 bare ground bare ground 29.23 30 0.77 2.57 3 bare ground bare ground 0 0.95 0.95 3.17 3 bare ground bare ground 0.99 1.93 0.94 3.13 3 bare ground bare grou'nd 1.96 2.27 0.31 1.03 3 bare ground bare ground 2.3 3.15 0.85 2.83 3 bare ground bare ground 3.24 3.49 0.25 0.83 S 3 bare ground bare ground 3.79 4.31 0.52 1.73 3 bare ground bare ground 4.36 4.71 0.35 1.17 3 bare ground bare ground 6.43 7 0.57 1.90 3 bare ground bare ground 7.12 7.98 0.86 2.87 3 bare ground bare ground 8.39 8.95 0.56 1.87 3 bare ground bare ground . 9.13 9.23 0.1 0.33 3 bare ground bare ground 9.56 10.08 0.52 1.73 3 bare ground bare ground 10.1 10.55 0.45 1.50 3 bare ground bare ground 10.6 10.79 0.19 0.63 3 bare ground bare ground 10.84 11.06 0.22 0.73 3 bare ground bare ground 11.1 11.61 0.51 1.70 3 bare ground bare ground 11.62 12.13 0.51 1.70 3 bare ground bare ground 13.3 14 0.7 2.33 3 bare ground bare ground 14.9 15.1 0.2 0.67 3 bare ground bare ground 19.79 20 0.21 0.70 3 bare ground bare ground 20.35 20.54 0.19 0.63 3 bare ground bare ground 21 21.23 0.23 0.77 3 bare ground bare ground 27.18 28.5 1.32 4.40 4 bare ground bare ground 3.1 3.3 0.2 0.67 4 bare ground bare ground 5.01 5.15 0.14 0.47 4 bare ground bare ground 8.9 9 0.1 0.33 4 bare ground bare ground 21.75 21.8 0.05 0.17 5 bare ground bare ground 0.6 1.8 1.2 4.00 W 5 bare ground bare ground 5.41 5.6 0.19 0.63 4 of 13 Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 . 5 bare ground bare ground 5.63 5.69 0.06 0 5 bare ground bare ground 6.83 7.15 0.32 1 5 bare ground bare ground 12.18 12.5 0.32 1 5 bare ground bare ground 21.48 21.6 0.12 - 0 6 bare ground bare ground 5.92 6.13 0.21 0 6 bare ground bare ground 8.42 8.56 0.14 0 6 bare ground bare ground 11.62 11.87 0.25 0 6 bare ground bare ground 14.82 15.05 0.23 0 6 bare ground bare ground 16.25 16.7 0.45 1 6 bare ground bare ground 18.85 19:28 0.43 1 6 bare ground bare ground 20.81 21.05 0.24 0 6 bare ground bare ground 21.5 21.9 0.4 4 Eleocharis sp. spike-rush 174 17.55 0.15 0 5 Eleocharis sp. spike-rush 22 22.2 0.2 0 6 Eleocharis sp. spike-rush 13.72 13.77 0.05 0 4 Epilobium diiatum willow herb 5.45 5.5 0.05 0 1 curassavicurn salt heliotrope 1.7 2.01 0.31 1 1 curassavicum salt heliotrope 17.28 17.37 0.09 0 1 curassavicum salt heliotrope 17.65 17.68 0.03 0 2 curassàvicum salt heliotrope 10.54 10.66 0.12 0 2 curassavicum salt heliotrope 11.3 11.43 0.13 0 4 curassavicum salt heliotrope 3.86 4.05 0.19 0 6 leopoldii southwestern spiny ru 5.72 5.9 0.18 0 1 litter litter 7.1 7.3 0.2 0 1 litter litter 10.33 10.7 0.37 1 1 litter litter 16.44 16.49 0.05 0 1 litter litter 17.52 17.56 0.04 0 1 litter litter 22.1 22.4 0.3 1 2 litter litter 0.8 1.2 0.4 1 2 litter litter 2.95 2.98 0.03 0 2 litter litter 24.07 24.35 0.28 0 2 litter litter 24.45 24.86 0.41 1 2 litter litter 25.15 25.3 0.15 0 2 litter litter 25.55 25.6 0.05 0 2 litter litter 27.14 27.2 0.06 0 2 litter litter 26.67 27.7 1.03 3 3 litter litter 4.93 5.4 0.47 1 3 litter litter 5.63 5.77 0.14 0 3 litter litter 12.4 12.5 0.1 0 3 litter litter 14 14.4 0.4 1 3 litter litter 21.75 21.95 0.2 0 3 litter litter 22.14 22.56 0.42 1 3 litter litter 22.66 22.92 0.26 0 3 litter litter 25.54 26 0.46 1 3 litter litter 26.25 26.5 0.25 0 4 litter litter 4.25 4.42 0.17 0 4 litter litter 4.7 4.81 0.11 0 .20 .07 .07 .40 .70 .47 .83 .77 .50 .43 .80 .33 .50 1.3 .67 .17 .17 0.0 .03 0.5 .30 .10 .40 .43 .63 .60 0.1 .67 10.7 .23 .17 - .13 .00 .33 .10 .93 .37 .50 .17 .20 .43 .57 .47 .33 .33 .67 .40 .87 .53 .83 .57 .37 5 of 13 Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 S 4 litter litter 5.5 5.67 0.17 0.57 4 litter litter 5.9 6.2 0.3 100 4 litter litter 6.25 6.5 0.25 0.83 4 litter litter 6.72 7.06 0.34 1.13 4 litter litter 8.2 8.9 0.7 2.33 4 litter litter 9.67 9.93 0.26 0.87 4 litter litter 9.96 10.3 0.34 1.13 4 litter litter 22.5 22.7 0.2 0.67 4 litter litter 23.15 23.3 0.15 0.50 4 litter litter 23.42 24.15 0.73 2.43 4 litter litter 26.75 26.87 0.12 0.40 4 litter litter 27.43 27.51 0.08 0.27 4 litter litter 28.45 28.73 0.28 0.93 4 litter litter 29 29.4 0.4 1.33 5 litter litter 0 0.3 0.3 1.00 5 litter litter 0.4 0.6 0.2 0.67 5 litter litter 1.99 2.15 0.16 0.53 5 litter . litter 2.16 2.3 0.14 0.47 5 litter litter 2.31 2.72 0.41 1.37 5 litter litter 2.73 2.8 0.07 0.23 5 litter litter 2.82 3 0.18 0.60 5 litter litter 7.6 8.15 0.55 1.83 5 litter litter 8.91 9.02 0.11 0.37 5 litter litter 10.46 11.25 0.79 2.63 5 litter litter 13 13.12 0.12 0.40 5 litter litter 13.5 13.7 0.2 0.67 5 litter litter 14.12 14.5 0.38 1.27 5 litter litter 15 15.4 0.4 1.33 5 litter litter, 17.5 18.35 0.85 2.83 5 litter litter 18.58 18.7 0.12 0.40 5 litter litter 19 19.18 0.18 0:60 5 litter litter 19.2 19.4 0.2 0.67 5 litter litter 23.35 23.55 0.2 0.67 5 litter litter 26.45 26.55 0.1 0.33 6. litter litter 9.1 9.2 0.1 0.33 6 litter litter 10.62 10.85 0.23 0.77 6 litter litter 14.06 14.2 0.14 0.47 6 litter litter 15.18 15.9 0.72 2.40 6 litter litter 16.75 17.26 0.51 1.70 6 litter litter 18.46 18.8 0.34 1.13 6 litter litter 19.8 20.1 0.3 1.00 6 litter litter 20.35 20.5 0.15 0.50 6 litter litter 24.4 24.9 0.5 1.67 1 hirsutissima evening primrose 17.48 17.52 0.04 0.13 1 hirsutissima evening primrose 17.56 17.65 0.09 0.30 2 hirsutissima evening primrose 7 7.7 0.7 2.33 2 hirsutissima evening primrose 17.45 17.7 0.25 0.83 2.7 6 of 13 Cannon Road (Macario Bridge) Mitigation • S Transect Biological Monitoring Raw Data October 2002 . 3 hirsutissima evening primrose 3.15 3.24 0.09 0.30 3 hirsutissima evening primrose 9.52 9.56 0.04 0.13 3 hirsutissima evening primrose 10.08 10.1 0.02 0.07 3 hirsutissima . evening primrose 18.79 19.52 ' 0.73 2.43 3 hirsutissima evening primrose 20 20.35 0.35 1.17 3 hirsutissima evenng primrose 20.54 20.9 0.36 1.20 3 hirsutissima ' evening primrose 22.92 22.93 0.01 0.03 3 hirsutissima evening primrose 26 26.1 0.1 0.33 3 hirsutissima evening primrose 26.5 26.64 0.14 0.47 4 hirsutissima evening primrose 5.37 5.48 0.11 0.37 4 hirsutissima evening primrose 5.67 5.9 0.23 0.77 4 hirsutissima evening primrose 18.25 18.27 0.02 0.07 4 hirsutissima evening primrose 18.78 18.8 0.02 0.07 5 hi?sutissima evening primrose 0.31 0.38 0.07 0.23 5 hirsutissima evening primrose 1.8 1.99 0.19 0.63 5 hirsutissima evening primrose 2.15 2.16 0.01 0.03 5 hirsutissima evening primrose 2.3 2.31 0.01 0.03 5 hirsutissima evening primrose 2.72 2.73 0.01 0.03 5 hirsutissima evening primrose 2.8 2.82 0.02 0.07 5 hirsutissima evening primrose 11.76 11.77 0.01 0.03 5 hirsutissima evening primrose 13.35 13.4 0.05 0.17 5 hirsutissima evening primrose 13.95 14 0.05 0.17 5 hirsutissima evening primrose 18.35 18.53 0.18 0.60 5 hirsutissima evening primrose 23.1 23.3 0.2 ' 0.67 5 hirsutissima evening primrose 24.15 24.47 0.32 1.07 5 hirsutissima evening primrose 25.48 25.5 0.02 0.07 6 hirsutissima evening primrose 10.85 10.88 0.03 0.10 6 hirsutissima evening primrose 14.3 14.55 0.25 0.83 6 hirsutissima evening primrose 15.95 15.97 '0.02 0.07 6 hirsutissima evening primrose 16.7 16.73 0.03 0.10 6 hirsutissima evening primrose 18.25 18.27 0.02 0.07 6 hirsutissima evening primrose 18.83 18.85 0.02 0.07 6 hirsutissima evening primrose 23.26 23.35 0.09 0.30 4 Picris echioides bristly ox-tongue 3.85 3.9 0.05 0.17 4 Picris echioides bristly.ox-tongue 7.5 7.8 0.3 1.00 4 Picris echioides bristly ox-tongue 20.05 20.13 0.08 0.27 4 Picris echioides , bristly ox-tongue 20.27 20.4 0.13 0.43 6 Picris echioides bristly ox-tongue 10.4 10.5 0.1 0.33 6 Picris echioides bristly ox-tongue 18.4 18.44 0.04 0.13 1 Pluchea odorata salt marsh fleabane 1.58 1.6 0.02 0.07 1 Pluchea odorata salt marsh fleabane 1.63 1.7 0.07 0.23 3 Pluchea odorata salt marsh fleabane' 0.95 0.99 0.04 • 0.13 3 Pluchea odorata salt marsh fleabane 1.93 1.96 0.03 0.10 3 Pluchea odorata salt marsh fleabane 12.13 12.15 0.02 0.07 3 Pluchea odorata salt marsh fleabane 14.4 14.9 0.5 1.67 . 3 Pluchea odorata salt marsh fleabane 15.4 15.45 0.05 0.17 • 3 Pluchea odorata salt marsh fleabane 21.95 22.14 0.19 0.63 2.3 7.6 7 of 13 .0 Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 3 Pluchea odorata salt marsh fleabane 22.56 22.66 0.1 0.33 4 Pluchea odorata salt marsh fleabane 2.97 3.1 0.13 0.43 4 Pluchea odorata salt marsh fleabane 6.5 6.7 0.2 0.67 4 Pluchea odorata salt marsh fleabane 8.15 8.2 0.05 0.17 4 Pluchea odorata salt marsh fleabane 9.05 9.1 0.05 0.17 4 Pluchea odorata salt marsh fleabane 11.12 11.25 0.13 0.43 4 Pluchea odorata salt marsh fleabane 11.35 11.65 0.3 1.00 4 Pluchea odorata salt marsh fleabane 11.95 12.5 0.55 1.83 4 Pluchea odorata salt marsh fleabane 16.95 17.8 0.85 2.83 4 Pluchea odorata salt marsh fleabane 18.9 19 0.1 0.33 4 Pluchea odorata salt marsh fleabane 19.22 19.5 0.28 0.93 4 Pluchea odorata salt marsh fleabane 19.65 19.75 0.1 0.33 4 Pluchea odorata salt marsh fleabane 19.89 20.25 0.36 1.20 4 Pluchea odorata salt marsh fleabane 20.45 20.9 0.45 1.50 4 Pluchea odorata salt marsh fleabane 21.3 21.48 0.18 0.60 4 Pluchea odorata salt marsh fleabane 21.8 22.15 0.35 1.17 4 Pluchea odorata salt marsh fleabane 22.25 22.5 - 0.25 0.83 4 Pluchea odorata salt marsh fleabane 22.7 23.02 0.32 1.07 4 Pluchea odorata salt marsh fleabane 23.3 23.42 0.12 0.40 4 Pluchea odorata salt marsh fleabane 24.57 24.8 0.23 0.77 4 Pluchea odorata salt marsh fleabane 25 25.15 0.15. 0.50 4 Pluchea odorata salt marsh fleabane 25.6 25.83 0.23 0.77 4 Pluchea odorata salt marsh fleabane 26.08 26.16 0.08 0.27 4 Pluchea odorata salt marsh fleabane 26.38 26.44 0.06 0.20 4 Pluchea odorata salt marsh fleabane 26.5 26.65 0.15 0.50 4 Pluchea odorata salt marsh fleabane 26.87 26.95 0.08 0.27 4 Pluchea odorata salt marsh fleabane 27.23 27.43 0.2 0.67 4 Pluchea odorata salt marsh fleabane 29.4 29.52 0.12 0.40 5 Pluchea odorata salt marsh fleabane 7.38 7.6 0.22 0.73 5 Pluchea odorata salt marsh fleabane . 8.18 8.25 0.07 0.23 5 Pluchea odorata salt marsh fleabane 11.26 11.4 0.14 0.47 5 Pluchea odorata salt marsh fleabane 12.8 13 0.2 0.67 5 Pluchea odorata salt marsh fleabane 16.3 16.5 0.2 0.67 5 Pluchea odorata salt marsh fleabane 18.4 18.58 0.18 0.60 5 Pluchea odorata salt marsh fleabane 18.7 18.95 0.25 0.83 5 Pluchea odorata salt marsh fleabane 19.18 19.2 0.02 0.07 5 Pluchea odorata salt marsh fleabane 21.8 22 0.2 0.67 5 Pluchea odorata salt marsh fleabane 22.05 23.35 1.3 4.33 Pluchea odorata salt marsh fleabane 24.65 24.9 0.25 0.83 5 Pluchea odorata salt marsh fleabane 26.25 26.45 0.2 0.67 5 Pluchea odorata salt marsh fleabane 26.55 26.66 0.11 0.37 5 Pluchea odorata salt marsh fleabane 26.9 27.15 0.25 0.83 5 Pluchea odorata salt marsh fleabane 27.7 29.4 1.7 5.67 6 Pluchea odorata salt marsh fleabane 5.2 5.25 0.05 0.17 6 Pluchea odorata salt marsh fleabane 5.65 5.72 0.07 0.23 6 Pluchea odorata salt marsh fleabane 8.56 8.63 0.07 0.23 6 Pluchea odorata salt marsh fleabane 8.77 9.1 0.33 1.10 8 of 13 Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 . 6 Plucheaodorafa salt marsh fleabane 10 10.49 0.49 1.63 6 Pluchea odorata salt marsh fleabane 16.05 16.1 0.05 0.17 6 Pluchea odorata salt marsh fleabane 18.8 18.83 0.03 0.10 6 Pluchea odorata salt marsh fleabane 19.28 19.35 0.07 0.23 6 Pluchea odorata salt marsh fleabane 19.75 19.8 0.05 0.17 6 Pluchea odorata salt marsh fleabane 25.8 25.85 0.05 0.17 6. Pluchea odorata salt marsh fleabane 28.12 28:13 0.01 0.03 I monospeliensis rabbitfoot grass 2.78 2.83 0.05 0.17 1 monospeliensis rabbitfoot grass 3.61 3.78 0.17 0.57 1 monospeliensis rabbitfoot grass 4.3 4.45 0.15 0.50 1 monospeliensis rabbitfoot grass 6 6.38 0.38 1.27 1 monospeliensis rabbitfoot grass 7.3 7.6 0.3 1.00 1 monospeliensis rabbitfoot grass 7.69 7.81 0.12 0.40 1 monospeliensis rabbitfoot grass . 7.93 8.15 0.22 0.73 1 monospeliensis rabbitfoot grass 8.47 8.63 0.16 0.53 1 monospeliensis rabbitfoot grass . 8.74 8.95 0.21 0.70 1 monospeliensis rabbitfoot grass 9.05 9.25 0.2 0.67 I monospeliensis rabbitfoot grass 10.7 11.88 1.18 3.93 1 monospeliensis rabbitfoot grass 16.38 16.44 0.06 0.20 1 monospeliensis rabbitfoot grass 16.49 16.65 0.16 0.53 1 monospeliensis rabbitfoot grass 18.05 18.62 0.57 1.90 1 monospeliensis rabbitfoot grass 18.7 19.8 1.1 3.67 1 monospeliensis rabbitfoot grass 21 21.9 0.9 3.00 2 monospeliensis rabbitfoot grass 1.32 1.43 0.11 0.37 2 monospeliensis rabbitfoot grass 3.3 3.37 0.07 0.23 2 monospeliensis rabbitfoot grass 5.2 5.7 0.5 1.67 2 monospeliensis rabbitfoot grass 8 8.15 0.15 0.50 2 monospeliensis rabbitfoot grass 8.5 8.7 0.2 0.67 2 monospeliensis rabbitfoot grass 23.35 23.54 0.19 0.63 2 monospeliensis rabbitfoot grass 23.93 24.07 0.14 0.47 2 monospeliensis rabbitfoot grass 27.92 28.4 0.48 1.60 3 monospeliensis rabbitfoot grass 3.76 3.79 0.03 0.10 3 monospeliensis rabbitfoot grass 4.75 4.8 0.05 0.17 3 monospeliensis rabbitfoot grass 8.95 9.06 0.11 0.37 3 monospeliensis rabbitfoot grass 27.15 27.18 0.03 0.10 4 monospeliensis rabbitfoot grass 5.15 5.45 0.3 1.00 4 monospeliensis rabbitfoot grass 7.06 7.22 0.16 0.53 4 monospeliensis rabbitfoot grass 9.93 9.96 0.03 0.10 4 monospeliensis rabbitfoot grass 27.2 27.25 0.05 0.17 4 monospeliensis rabbitfoot grass 27.8 27.9 0.1 0.33 5 monospèliensis rabbitfoot grass 4.41 4.7 0.29 0.97 5 monospeliensis rabbitfoot grass 4.88 5.41 0.53 1.77 5 monospeliensis rabbitfoot grass 5.69 6.83 1.14 3.80 5 monospeliensis rabbitfoot grass 7.15 7.6 0.45 1.50 5 monospeliensis rabbitfoot grass 12.5 13 0.5 1.67 5 monospeliensis rabbitfoot grass 24.5 24.62 0.12 0.40 W 4 rock rock 1 0 0.5 0.5 1.67 6.5 0.3 9 of 13 Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 . 1 Rubus ursinus California blackberry 14.7 14.73 0.03 0.10 4 Rubus ursinus California blackberry 1 1.15 0.15 0.50 4 Rubus ursinus California blackberry 3.3 3.9 0.6 2.00 4 Rubus ursinus California blackberry 4.42 4.47 0.05 0.17 4 Rubus ursinus California blackberry 4.53 4.7 0.17 0.57 4 Rubus ursinus California blackberry 4.81 4.94 0.13 0.43 4 Rubus ursinus California blackberry 6.65 6.72 0.07 0.23 4 Rubus ursinus California blackberry 7.75 8.2 0.45 1.50 5 Rubus ursinus . California blackberry 8.61 8.91 0.3 1.00 5 Rubus ursinus California blackberry 9.02 9.94 0.92 3.07 5 Rubus ursinus California blackberry 10.45 10.46 0.01 0.03 4 Salicornia virginica pickleweed 0.54 0.55 0.01 0.03 4 Salicornia virginica pickleweed 0.8 0.81 0.01 0.03 1 Salix exigua narrow-leaved willow 22.65 23.2 0.55 1.83 1 Salix exigua narrow-leaved willow 28 28.3 0.3 1.00 5 Salix exigua narrow-leaved willow 25 25.9 0.9 3.00 5 Salix exigua narrow-leaved willow 26.6 27.8 1.2 4.00 3 Salix gooddingii black willow 2.27 2.3 0.03 0.10 3 Salix gooddingii black willow 15.4 18.8 3.4 11.33 4 Salix gooddingii black willow 0.7 3 2.3 7.67 5 Salix gooddingil black willow 3 5 2 6.67 5 Salixgooddingll black willow 13.2 13.6 0.4 1.33 . 5 Salixgooddingll black willow 23.65 25 1.35 4.50 6 Salixgooddingii black willow 0.2 4.16 3.96 13.20 6 Salixgooddingii black willow 24.9 26.37 1.47 4.90 1 Salix lasiolepis arroyo willow 23.9 26.5 2.6 8.67 2 Salix lasiolepis arroyo willow 17.4 18 0.6 2.00 2 Salix lasiolepis arroyo willow 22 22.5 0.5 1.67 2 Salix lasiolepis arroyo willow 23.12 23.2 0.08 0.27 2 Salix lasiolepis arroyo willow 28.35 29.3 0.95 3.17 3 Salix lasiolepis arroyo willow 19.52 19.79 0.27 0.90 3 Salix lasiolepis arroyo willow 23.15 23.55 0.4 1.33 3 Salix lasiolepis arroyo willow 24.3 25.54 1.24 4.13 3 Salix lasiolepis arroyo willow 26.72 27.15 0.43 1.43 3 Salix lasiolepis arroyo willow 26.65 29.68 3.03 10.10 4 Salix lasiolepis arroyo willow 3.4 3.7 0.3 1.00 4 Salix lasiolepis arroyo willow 4.05 4.25 . 0.2 0.67 4 Salix lasiolepis arroyo willow 4.47 4.65 -0.18 0.60 4 Salix lasiolepis arroyo willow 4.94 5.01 0.07 0.23 4 Salix lasiolepis arroyo willow 6.2 6.25 0.05 0.17 4 Salix lasiolepis arroyo willow 7.3 7.75 0.45 1.50 4 Salix lasiolepis arroyo willow 7.9 8.15 0.25 0.83 4 Salix lasiolepis arroyo willow 10.3 12.4 2.1 7.00 4 Salix lasiolepis arroyo willow 17.6 18.7 1.1 3.67 4 Salix lasiolepis arroyo willow 19.67 19.8 0.13 0.43 4 Salix lasiolepis arroyo willow 19.83 19.89 0.06 0.20 4 Salix lasiolepis arroyo willow 20.1 20.2 0.1 0,33 1.6 0.0 1.6 8.3 20.1 10 of 13 Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 . 4 Salix lasiolepis arroyo willow 20.5 21.75 1.25 4.17 4 Salix lasiolepis arroyo willow 24.3 24.7 0.4 1.33 4 Salix lasiolepis arroyo willow 26.99 27.2 0.21 0.70 4 Salix lasiolepis arroyo willow 27.51 28.4 0.89 2.97 5 Salix lasiolepis arroyo willow 8.3 8.63 0.33 1.10 5 Salix lasiolepis arroyo willow 9.4 10.45 1.05 3.50 5 Salix lasiolepis arroyo willow 13.33 13.4 0.07 0.23 5 Salix lasiolepis arroyo willow 15.4 17:5 2.1 7.00 5 Salix lasiolepis arroyo willow 20.6 20.75 0.15 0.50 5 Salix lasiolepis arroyo willow 21.1 21.25 0.15 0.50 5 Salix lasiolepis arroyo willow 22.2 22.6 0.4 1.33 5 Salix lasiolepis arroyo willow 24.44 24.48 0.04 0.13 5 Salix lasiolepis arroyo willow 25.7 26.2 0.5 1.67 6 Salix lasiolepis arroyo willow 3.85 4.65 0.8 2.67 6 Salix lasiolepis arroyo willow 4.8 5.75 0.95 3.17 6 Salix lasiolepis arroyo willow 5.58 5.9 0.32 1.07 6 Salix lasiolepis arroyo willow 9.2 10.4 1.2 4.00 6 Salix lasiolepis arroyo willow 10.88 11.54 0.66 2.20 6 Salix lasiolepis arroyo willow 11.87 12.65 0.78 2.60 6 Salix lasiolepis arroyo willow 12.7 14.06 1.36 4.53 6 Salix lasiolepis arroyo willow 14.2 14.7 0.5 1.67 6 Salix lasiolepis arroyo willow 15.9 16.05 0.15 0.50 6 Salix lasiolepis arroyo willow 16.1 16.25 0.15 0.50 6 Sallx lasiolepis arroyo willow 17.26 18.4 1.14 3.80 6 Salix lasiolepis arroyo willow 19.35 19.75 0.4 1.33 6 Salix lasiolepis arroyo willow 20.1 20.35 0.25 0.83 6 Salix lasiolepis arroyo willow* 20.5 20.81 0.31 1.03 6 Salix lasiolepis arroyo willow 21.05 21.5 0.45 1.50 6 Salix lasiolepis arroyo willow 22.75 23.15 0.4 1.33 6 Salix lasiolepis arroyo willow 23.35 23.85 0.5 1.67 6 Salix lasiolepis arroyo willow 24.2 24.4 0.2 0.67 6 Salix lasiolepis arroyo willow 25.1 25.45 0.35 1.17 6 Salix lasiolepis arroyo willow 26.25 28.45 2.2 7.33 6 Salix lasiolepis arroyo willow 28.8 29.15 0.35 1.17 6 Salix lasiolepis arroyo willow 29.8 29.85 0.05 0.17 2 Scirpus californicus California bulrush 8.15 8.85 0.7 2.33 2 Scirpus californicus California bulrush 9.73 10.55 0.82 2.73 2 Scirpus californicus California bulrush 11 23.93 12.93 43.10 2 Scirpus californicus California bulrush 27.55 27.67 0.12 0.40 2 Scirpus californicus California bulrush 29.22 29.23 0.01 0.03 4 Scirpus californicus California bulrush 13.5 16 2.5 8.33 4 Scirpus californicus California bulrush 29.6 30 0.4 1.33 5 Scirpus californicus California bulrush 19.7 20.1 0.4 1.33 6 Scirpuè californicus California bulrush 7.95 7.97 0.02 0.07 6 Scirpus californicus California bulrush 29.45 30 0.55 1.83 . 5 Scirpus microcarpus small-fruited bulrush 10 10.4 0.4 1.33 5 Scirpus microcarpus small-fruited bulrush 11.25 12.18 0.93 3.10 11 of 13 10.3 0.7 . 1 Scirpus robustus 1 Scirpus robustus 1 Scirpus robustus 1 Scirpus robustus 1 - Scirpus robustus 1 Scirpus robustus 2 Scirpus robustus 2 Scirpus robustus 2 Scirpus robustus 2 Scirpus robustus 2 Scirpus robustus 2 Scirpus robustus 2 Scirpus robustus 2 Scirpus robustus 3 Scirpus robustus 3 Scirpus robustus 4 Scirpus robustus 4 Scirpus robustus 4 Scirpus robustus 4 Scirpus robustus 4 Scirpus robustus 4 Scirpus robustus 4 Scirpus robustus 4 Scirpus robustus 4 Scirpus robustus 4 Scirpus robustus 4 Scirpus robustus 5 Scirpus robustus 5 Scirpus robustus 6 Scirpus robustus 6 Scirpus robustus 6 Scirpus robustus 6 Scirpus robustus 6 Scirpus robustus 2 Typha latifolia 2 Typha latifolia 3 Typha latifolia 4 . Typha latifolia 4 Typha latifolia 4 Typha latifolia 4 Typha latifolia 4 Typha latifolia 5 Typha latifolia 5 Typha latifolia 5 Typha.Iatifolia . 5 Typha latifolia 6 Typha latifolia 0.10 0.43 0.13 0.10 0.17 0.27 17.17 0.17 2.53 0.97 0.13 2.50 0.63 0.47 4.37 0.67 0.83 0.77 0.83 1.00 0.03 0.43 0.67 1.10 0.67 0.77 0.90 0.80 0.30 0.30 0.50 3.20 0.07 0.67 24.17 3.00 0.33 17.17 1.50 2.33 0.83 1.83 4.83 0.20 1.00 2.00 7.63 7.4 12.1 Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 prairie bulrush 7.69 7.72 0.03 prairie bulrush 16.65 16.78 0.13 prairie bulrush 17.15 17.19 0.04 prairie bulrush 17.25 17.28 0.03 prairie bulrush 19.85 19.9 0.05 prairie bulrush 22.02 22.1 0.08 prairie bulrush 13.95 19.1 5.15 prairie bulrush 20.3 20.35 0.05 prairie bulrush 22.05 22.81 0.76 prairie bulrush 24.86 25.15 0.29 prairie bulrush 25.34 25.38 0.04 prairie bulrush 25.6 26.35 0.75 prairie bulrush 26.68 26.87 , 0.19 prairie bulrush 27 27.14 0.14 prairie bulrush 15.14 16.45 1.31 prairie bulrush 17.1 17.3 0.2 prairie bulrush 0.5 0.75 0.25 prairie bulrush ' 19.07 ' 19.3 0.23 prairie bulrush 19.45 19.7 0.25 prairie bulrush 20.15 20.45 0.3 prairie bulrush 21.6 21.61 0.01 prairie bulrush 23.02 23.15 0.13 prairie bulrush 24.15 24.35 0.2, prairie bulrush 25.1 25.43 0.33 prairie bulrush 26.55 26.75 0.2 prairie bulrush 26.87 27.1 0.23 prairie bulrush 28.73 29 0.27 prairie bulrush 18.76 19 0.24 prairie bulrush 28.13 28.22 0.09 prairie bulrush 3.72 381 0.09 prairie bulrush 4.65 4.8 0.15 prairie bulrush 4.96 5.92 0.96 , prairie bulrush 16.73 116.75 0.02 prairie bulrush 27.8 28 0.2 tall cattail 11.85 19.1 7.25 tall cattail 22.8 23.7 0.9 tall cattail 16.1 16.2 0.1 tall cattail . 12.05 1,7.2 5.15 tall cattail 24.7 25.15 0.45 tall cattail 25.8 26.5 0.7 tall cattail 28.2 28.45 0.25 tall cattail 29.45 30 0.55 tall cattail 19.4 20.85 1.45 tall cattail 28.2 . 28.26 0.06 tall cattail 28.9 29.2 0.3 tall cattail 29.4 30 0.6 tall cattail . 6.13 8.42 2.29 12 of 13 . 6 Typha latifolia 6 . Typha latifolia 6 Typha latifolia Cannon Road (Macario Bridge) Mitigation Transect Biological Monitoring Raw Data October 2002 tall cattail 8.63 8.78 0.15 0.50 tall cattail 9.65 9.75 0.1 0.33 tall cattail . 28.45 30 1.55 5.17 13 of 13 . Scientific Name Common Name Absolute Cover (%) Salix lasiolepis * arroyo willow 20.1 Typhalatifolia * tall cattail 12.1 Scirpus californicus * California bulrush 10.3 Salix gooddingll * black willow 8.3 Pluchea odorata * salt marsh fleabane 7.6 Scirpus robustus * prairie bulrush 7.4 Baccharis salicifolia * mulefat 6.7 Polypogon monospelierisis rabbitfoot grass 6.5 Artemisia douglasiana * California mugwort 6.3 Oenethera elata .ssp. hirsutissima * evening primrose 2.7 Ambrosia psiostachya * western ragweed 2.5 Picris echioides bristly ox-tongue 2.3 Anemopsis californica * yerba mansa 1.8 Salix exigua * narrow-leaved willow 1.6 Rubus ursinus * California blackberry 1.6 * Eleocharis sp. spike-rush 1.3 Scirpus microáarpus * small-fruited bulrush 0.7 Heliotropium curassavicum * salt heliotrope 0.5 Artemisia pa/men * San Diego sagewort 0.4 Juncus acutus ssp. IeopoIdii southwestern spiny rush 0.1 Epiobium ciliatum * willow herb 0.03 Salicornia virginica * * Baccharis pickleweed bush coyote 0.01 0.01 pilu/anis Percent Total Cover 100.9 Percent Native Cover 92.0 Percent Nonnative Cover 8.8 bare ground bare ground 22.6 litter litter 10.7 rock rock 0.3 - • total open ground 33.6 C Average Heights.(m) 2.0 Heights 1 1 1 1 2 2 2 2 .2 3 3 3 3 3 4 4 5 5 5 .6 6 6 6 6 2 6 6 3 5 5 5 6 2 3 Baccharis salicifolia Baccharis sail cifoila Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis saiicifoiia Baccharis salicifolia Baccharis sailcifoila Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Baccharis salicifolia Populus fremontll Populus fremontu Populus fremantll Populus fremon (II Populus fremantil Populus fremo.ntu Populus fremontil Populus fremontu Saiix exigua Saiix exigua Saiix exigua Saiix exigua Saiix exigua Saiix exigua Saiix exigua Saiix exigua Saiix exigua Saiix exigua Saiix exigua Saiix exigua Saiix gooddingii Saiix gooddingil mulefat 1.5 container mulefat 2.9 container mulefat 1.8 container mulefat 2.1 container mulefat 1.7 container mulefat 2.8 container mulefat 2.7 container mulefat 1.6 container mulefat 1.8 container mulefat 2.2 container, mulefat 1.5 container mulefat 1.9 container mulefat 2.3 container mulefat 2.3 . container mulefat 2.4 container mulefat . 1.4 container mulefat . 1.3 container mulefat 1.5 container mulefat 1.8 container mulefat 3 container mulefat 2.4 container mulefat 2 container mulefat 1.2 container mulefat 2 container Fremont cottonwood 1.7 container Fremont cottonwood 2.3 container Fremont cottonwood 2.1 container Fremont cottonwood 3.1 container Fremont cottonwood 1.8 container Fremont cottonwood 0.9 container Fremont cottonwood 2.2 container Fremont cottonwood 2.5 container narrow-leaved willow 1.6 container narrow-leaved willow 2.1 container narrow-leaved willow 2.6 container narrow-leaved willow 3.5 container narrow-leaved willow 2.4 container narrow-leaved willow 2.7 container narrow-leaved willow 2.5 container narrow-leaved willow 1.7 container narrow-leaved willow 2.5 container narrow-leaved willow 3.3 container narrow-leaved willow 2.7 container narrow-leaved willow 2.5 container black willow 3.7 container black willow 2.4 container 2.1 2.5 12 3.1 18 3 Salix gooddingii black willow 4.1 container W 3 Salix gooddingii black willow 2.6 container 3 Salix gooddingii black willow 2.2 container 4 Salix gooddingii black willow 3.3 container 4 Salix gooddingii black willow 3.2 container 4 Salix gooddingii black willow 3 container 5 Salix gooddingii black willow 2.8 container 5 Salix gooddingii black willow 3.6 container 5 Salix gooddingii black willow 2.4 container 5 Salix gooddingii black willow 2.4 container 5 Salix gooddingii black willow 2.3 container 5 Salix gooddingii black willow 4.1 container 5 Salix gooddingii black willow 3.5 container 5 Salix gooddingii black willow 3.1 container 6 Salix gooddingii black willow 4.2 container 6 Salix gooddingii black willow 2.3 container 1 Salix lasiolepis arroyo willow 2.3 container 1 Salix lasiolepis arroyo willow 2.8 container 1 Salix lasiolepis arroyo willow 2.2 container 2 Salix lasiolepis arroyo willow 1.6 container 2 Salix lasiolepis arroyo willow 2.4 container 2 Salix lasiolepis arroyo willow 1.6 container 2 3 Salix lasiolepis Salix lasiolepis arroyo willow arroyo willow 2.7 2.5 container container 3 Salix lasiolepis arroyo willow 3 container 3 Salix lasiolepis arroyo willow 2.8 container 3 Salix lasiolepis arroyo willow 2.3 container 3 Salix lasiolepis arroyo willow 2.5 container 4 Salix lasiolepis arroyo willow 2.3 container 4 Salix lasiolepis arroyo willow 3.5 container 4 Salix lasiolepis arroyo willow 2.6 container 4 Salix lasiolepis arroyo willow 4.4 container 5 Salix lasiolepis arroyo willow 3.6 container 5 Salix lasiolepis arroyo willow 2.7 container 6 Salix lasiolepis arroyo willow 4 container 6 Salix lasiolepis arroyo willow 4.1 container 6 Salix lasiolepis arroyo willow 4.2 container 6 Salix lasiolepis arroyo willow 2.4 container 6 Salix lasiolepis arroyo willow 4.7. container 6 Salix lasiolepis arroyo willow 3.4 container 6 Salix lasiolepis arroyo willow 4 container Sambucus mexicana elderberry 2 container Sambucus mexicana elderberry 2 container Sambucus mexicana elderberry 0.1 container Sambucus mexicana elderberry 0.4 container Sambucus mexicana elderberry 1.8 container 3.0 25 1.3 5 . Scientific Name Common Name Height (m) Sample Size Salix exigua narrow-leaved willow 2.5 12 Salix gooddingii black willow 3.1 18 Salix lasiolepis arroyo willow 3.0 25 Sambucus mexicana elderberry • 1.3 5 . .• I 11