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HomeMy WebLinkAbout3919A; Encinas Creek Bridge Replacement Project; Encinas Creek Bridge Replacement Project; 2011-08-01YEAR 1 REVEGETATION MONITORING REPORT ENCINAS CREEK BRIDGE REPLACEMENT PROJECT SAN DIEGO COUNTY, CALIFORNIA Prepared for: City of Carlsbad 1635 Faraday Avenue Carlsbad, California 92008 Contact: Sherri Howard Sherri.Howard@carlsbadca.gov (760) 602-2756 Prepared by: AECOM 1420 Kettner Boulevard, Suite 500 San Diego, California 92101 Contact: Mandy Lemig mandy.lemig@aecom.com (619) 233-1454 August 2011 Page i Encinas Creek Bridge Replacement Project Year 1 Revegetation Monitoring Report TABLE OF CONTENTS Section Page 1.0 INTRODUCTION ...............................................................................................................1 1.1 Project Description and Impacts ............................................................................. 1 1.2 Project Location ...................................................................................................... 2 1.3 Permit Requirements ............................................................................................... 2 1.4 Performance Criteria ............................................................................................... 6 1.5 Revegetation Summary ........................................................................................... 7 2.0 METHODOLOGY ............................................................................................................11 2.1 Quantitative Monitoring........................................................................................ 11 2.1.1 Container Plant Survival ........................................................................... 11 2.2 Qualitative Monitoring.......................................................................................... 12 3.0 RESULTS AND COMPARISON TO PERFORMANCE CRITERIA .............................12 3.1 Quantitative Monitoring Results ........................................................................... 12 3.1.1 Container Plant Survival Assessment ....................................................... 13 3.2 Qualitative Analysis .............................................................................................. 13 4.0 CONCLUSION AND RECOMMENDATIONS ..............................................................15 4.1 Conclusions ........................................................................................................... 16 4.2 Recommendations ................................................................................................. 16 Report Certification .......................................................................................................................17 ATTACHMENTS 1 30-Day Revegetation Memo 2 60-Day Revegetation Memo 3 Photo Monitoring Encinas Creek Bridge Replacement Project Page ii Year 1 Revegetation Monitoring Report LIST OF FIGURES Figure Page 1 Regional Map .......................................................................................................................3 2 Project Vicinity ....................................................................................................................4 3 Project Footprint and Permanent Photostations ...................................................................5 LIST OF TABLES Table Page 1 Permits Required for the Encinas Creek Bridge Replacement Project ................................2 2 Coastal and Valley Freshwater Marsh Success Standards ...................................................6 3 Disturbed Upland Habitat Success Standards ......................................................................6 4 Coastal and Valley Freshwater Marsh – Container Plant Palette ........................................8 5 Coastal and Valley Freshwater Marsh – Seed Mix ..............................................................8 6 Disturbed Upland Habitat – Erosion Control Native Seed Mix ..........................................9 7 Disturbed Upland – Container Plant Palette ......................................................................10 8 Percent Container Plant Survival during Year 1 ................................................................13 9 Encinas Creek Year 1 Species List ....................................................................................14 Page 1 Encinas Creek Bridge Replacement Project Year 1 Revegetation Monitoring Report 1.0 INTRODUCTION This Year 1 annual monitoring report is being submitted to the Regional Water Quality Control Board (RWQCB) under permit 09C-046, Condition A10 on behalf of the City of Carlsbad (City) and provides a comprehensive analysis for Year 1 of the revegetation maintenance and monitoring for the Encinas Creek Bridge Replacement Project along the Pacific Coast Highway (Carlsbad Boulevard) in Carlsbad, California. AECOM was tasked by the City to provide biological monitoring during the reconstruction of the bridge; oversee the revegetation of the habitat surrounding the bridge (using subcontractor Nature’s Image) during the 90-day plant establishment period (PEP); and maintain and monitor the site for a period of 2 years following the PEP. The 2-year monitoring and maintenance period began in August 2010, following a 90-day plant PEP that included an initial hydroseed effort and installation of supplemental container plants. This report summarizes monitoring and maintenance activities for the period between August 2010 and July 2011 (Year 1) including site analysis relative to success criteria and recommendations for ongoing activities at the site. 1.1 Project Description and Impacts Construction activities associated with the replacement of Encinas Creek Bridge were conducted between February 16 and May 28, 2010. Revegetation of the temporary disturbance areas was completed over the course of 3 days from May 26 through May 28, 2010 and was installed per the Encinas Creek Bridge Replacement Project-Temporary Impact Revegetation Specifications (Revegetation Specifications, AECOM 2009). The roadway reopened to traffic on May 28, 2010. Following the reopening of the bridge, a 90-day PEP was initiated. During the PEP, the site was maintained by the construction company’s subcontractor, Nature’s Image, and monitored by AECOM. AECOM assumed maintenance responsibility for the site in August 2010 and has maintained and monitored the site since that time. Mitigation for temporary impacts as a result of bridge replacement was required by various project permits and associated documents, as shown in Table 1. Mitigation occurred on site at a 1:1 replacement ratio within the temporary impact areas. Two primary habitats were impacted: coastal and valley freshwater marsh (CVFM) (0.004 acre) and disturbed upland (0.255 acre). Revegetation included two distinct seed mixes (upland and wetland mixes) and a combination of hydroseeding and container planting. Encinas Creek Bridge Replacement Project Page 2 Year 1 Revegetation Monitoring Report Table 1. Permits Required for the Encinas Creek Bridge Replacement Project California Regional Water Quality Control Board (RWQCB), 401 Water Quality Certification (09C-046) California Coastal Commission (CCC), Coastal Development Permit 6-09-051 U.S. Army Corps of Engineers (USACE), Section 404, Nationwide Permit 14 Linear Transportation Projects, general terms and conditions California Department of Fish and Game (CDFG), Lake or Streambed Alteration Notification No. 1600-2009-0168-R5 Carlsbad Planning Commission Resolutions No. 6624–6627 Department of Parks and Recreation Right of Entry Permit, April 30, 2009 Encinas Creek Bridge Replacement Project – Temporary Impact Revegetation Specifications (AECOM 2009) Encinas Creek Bridge Replacement Project Mitigation Monitoring and Reporting Program (MMRP) In addition to the main revegetation area, two upland vehicle pull-out areas to the north and south of the bridge were used to stage work vehicles during the bridge replacement. Although these upland areas are not formally a part of the revegetation effort, native plants and seed were installed to help reestablish upland native vegetation within these two areas, reduce erosion potential, and discourage future vehicular use. These two areas will be qualitatively monitored, but are not subject to success criteria. 1.2 Project Location The Encinas Creek Bridge Replacement project is located south of Palomar Airport Road and West of Interstate 5 in San Diego County in the City of Carlsbad, California. The revegetation site is located at the western terminus of Encinas Creek directly east of Carlsbad Boulevard and the Encinas Creek Bridge. Maps of the project vicinity, the specific project location, and permanent photostations are presented in Figures 1, 2, and 3. 1.3 Permit Requirements As discussed in Section 1.1 above, mitigation is required by various project permits. As there were no permanent impacts to habitat, mitigation is occurring on site at a 1:1 replacement ratio within the temporary impact areas, which include coastal and valley freshwater marsh (CVFM) (0.004 acre) and disturbed upland (0.255 acre). Figure 1 Regional Map PROJECT LOCATION Encinas Creek Bridge Replacement ProjectYear 1 Revegetation Monitoring ReportP:\2007\07080213.01 Encinas Creek Bridge Replacement\5.0 Graphics (Non-CAD)\5.4 Proj_Graphics\Figures\Fig 1 rmap.ai (dbrady) 3/23/09 Pacif i cOc e a n E n c i n a sC reekStudy Area Car l sbadBl vdSout hCar l sbadSt at eBeachPalomar Airport Rd Avi a r aPkwyP o i n s e t t a LaneDe l No rt e CollegeBlvdB atiq u i t o s L a g o o n C a r l s b a dCarlsbad E n c i n i t a sEnci n i t a s Poinsetta Park Aviara Golf Course Legoland Family Park 5 21 Figure 2 Project Vicinity Source: ESRI StreetMap 2007 / EDAW2009 Scale: 1 : 24,000; 1 inch = 2000 feet 2,000 0 2,0001,000 Feet Path: P:\2007\07080213.01\GIS\Layout\fig_site_vicinity_8x11.mxd, 03/25/09, PJonas Encinas Creek Bridge Replacement ProjectYear 1 Revegetation Monitoring Report Car l sbad Boul evar dCar l sbad Boul evar d[ Sout hbound ] [ Nor t hbound ]Pacific Oc e a n E n c i n as C r e e k New Bridge Footprint Old Bridge Footprint Encinas Creek Bridge Replacement Project Source: DigitalGlobe 2008 / Project Data -- City of Carlsbad 2009 ; SanGIS 2009/ EDAW 2009 Scale: 1 = 1,500; 1 inch = 125 feet Path: P:\2007\07080213.01 Encinas Creek Bridge Replacement\6.0 GIS\6.3 Layout\Revegetation Monitoring Rpt\fig_photopoint_base8x11.mxd, 8/17/2011, augellop I Year 1 Revegetation Monitoring Report Figure 3 Project Footprint and Permanent Photos tations 125 0 12562.5 Feet New Bridge Footprint Old Bridge Footprint LEGEND i!(1i!(7 i!(8i!(6 i!(5 i!(4 i!(3 i!(2 Photostationi !(# Encinas Creek Bridge Replacement Project Page 6 Year 1 Revegetation Monitoring Report 1.4 Performance Criteria The performance criteria for the revegetation site listed in Tables 2 and 3. Table 2. Coastal and Valley Freshwater Marsh Success Standards Success Standard 90-Day Plant Establishment Period1 Year 1 Year 2 Potential Remedial Measures if Standard Is Not Being Met Container Plant Survival 100 percent 100 percent 100 percent Replant as needed to maintain survival standard; increase plant care (e.g., watering) as needed. Native Seed Germination and Cover 20 percent cover from seeded species and volunteers 60 percent cover from seeded species and volunteers 90 percent cover from seeded species and volunteers Reseed as needed; increase plant care (e.g., watering) and weed control as needed. Weed Control Weed cover less than 5 percent and no invasive exotics Weed cover less than 1 percent and no invasive exotics 0 percent weeds Increase weed control. Trash and Debris No trash or debris No trash or debris No trash or debris Remove trash and debris as needed. Erosion Control No gully formation or associated sediment transport No gully formation or associated sediment transport No gully formation or associated sediment transport Repair erosion, and install and maintain appropriate erosion control materials to prevent erosion. 1 The initial plant establishment period of 90 days is the responsibility of the contractor. Following successful completion of the plant establishment period, the remaining maintenance and monitoring requirements will be the responsibility of the City. Table 3. Disturbed Upland Habitat Success Standards Success Standard 90-Day Plant Establishment Period1 Year 1 Year 2 Remedial Measure if Standards Is Not Being Met Seed Germination and Cover 15 percent cover from seeded species and volunteers (native species and nonproblematic weeds) 50 percent cover from seeded species and volunteers (native species and nonproble- matic weeds) 80 percent cover from seeded species and volunteers (native species and nonproblematic weeds) Reseed as needed; increase plant care (e.g., watering) as needed. Weed Control2 Cover of problematic invasive exotics less than 5 percent Cover of problematic invasive exotics less than 1 percent 0 percent cover of problematic invasive exotics Increase weed control of problematic invasive exotics. Page 7 Encinas Creek Bridge Replacement Project Year 1 Revegetation Monitoring Report Success Standard 90-Day Plant Establishment Period1 Year 1 Year 2 Remedial Measure if Standards Is Not Being Met Trash and Debris No trash or debris No trash or debris No trash or debris Remove trash and debris as needed. Erosion Control No gully/rill formation or associated sediment transport No gully/rill formation or associated sediment transport No gully/rill formation or associated sediment transport Repair erosion, and install and maintain appropriate erosion control materials to prevent erosion. 1 The initial plant establishment period of 90 days is the responsibility of the contractor. Following successful completion of the plant establishment period, the remaining maintenance and monitoring requirements will be the responsibility of the City. 2 Problematic invasive exotics are defined here as plants listed by the California Invasive Plant Council (Cal-IPC) as “moderate” or “high” threats to California wildlands; www.cal-ipc.org. 1.5 Revegetation Summary The following section contains a complete summary of the revegetation effort, including a summary of work that occurred during site installation, the 60-day monitoring, and the time between the completion of the 90-day PEP and the end of Year 1 (June 2011). The 30-day and 60-day memo, prepared by AECOM, documenting the onsite observations of the revegetation area are included as Attachment 1 and Attachment 2. Installation The installation phase was completed by the Contractor and their subcontractor Natures Image and consisted of site preparation, container planting, and hydroseeding as described in detail below. Site Preparation: Following the replacement of Encinas Creek Bridge, all trash, construction materials, and nonnative plant material was removed from the revegetation area. Prior to planting, appropriate erosion control devices were installed such as seedless straw waddles to assist with soil retention in the planting areas. Any existing weeds were treated with herbicide approved for use around waterways. When necessary, soil was decompacted to facilitate better planting conditions and to encourage better germination of seeds. Container Planting: Prior to planting, the limits of the CVFM were confirmed by the AECOM restoration ecologist in the field. Revegetation of the temporary disturbance areas was completed over the course of 3 days from May 26 through May 28, 2010. The limits of the revegetation area (both CVFM and disturbed upland) begin at the terminus of Encinas Creek and end at the cobble Encinas Creek Bridge Replacement Project Page 8 Year 1 Revegetation Monitoring Report inlet to the culvert under Encinas Creek Bridge, which leads to the Pacific Ocean (Figure 2). Revegetation of the site followed the criteria identified in the Revegetation Specifications (AECOM 2009) and included both container planting and hydroseeding. Container planting was specified for the CVFM habitat area only. The emergent plants were installed by the contractor, prior to hydroseed application, according to the Revegetation Specifications (AECOM 2009). Three container plant species were planted: California Bulrush (Schoenoplectus californicus), sturdy bulrush (Schoenoplectus robustus), and broad-leave cattail (Typha latifolia). Initial planting quantities and spacing, which are listed in Table 4, were determined according to Revegetation Specifications (AECOM 2009). Table 4. Coastal and Valley Freshwater Marsh – Container Plant Palette Common Name (Botanical Name) Quantity for 0.004-Acre Area California bulrush (Schoenoplectus californicus) 5 Sturdy bulrush (Schoenoplectus robustus) 5 Broad-leave cattail (Typha latifolia) 4 Total1 14 1 The initial quantity was increased to 20 container plants as the potential wetland area was larger than 0.004 acre. Hydroseeding: The Revegetation Specifications (AECOM 2009) identified seeding palettes for both the CVFM and disturbed upland areas. Seed quantities, which are listed in Tables 5 and 6, were determined according to Revegetation Specifications. Nature’s Image conducted the initial hydroseeding during plant installation in May 2010. The initial seed treatment was applied using hydroseed method, whereby seed is mixed into slurry with mulch and an organic tackifier to hold the seed in place on the soil. Table 5. Coastal and Valley Freshwater Marsh – Seed Mix Common Name (Botanical Name) Pounds of Pure Live Seed (PLS) for 0.004-Acre Area Tall flatsege (Cyperus eragrostis) 0.1 Salt marsh fleabane (Pluchea odorata) 0.3 Alkali sacaton (Sporobolus airoides) 0.1 Total 0.5 Page 9 Encinas Creek Bridge Replacement Project Year 1 Revegetation Monitoring Report Table 6. Disturbed Upland Habitat – Erosion Control Native Seed Mix Common Name (Botanical Name) Original Seed Mix Specifications Supplemental Seed Mix Specifications Pounds of Pure Live Seed (PLS) western ragweed (Ambrosia psilostachya) 2 1 California sun cup (Camissonia bisorta) 0.5 0.5 California croton (Croton californicus) 1 1 golden tarweed (Deinandra fasciculata) 2 0.5 California buckwheat (Eriogonum fasciculatum ssp. fasciculatum) 2 2 golden yarrow (Eriophyllum confertiflorum) 0.5 0.5 Hazardia squarrosa (sawtoothed goldenbush) 1 1 deerweed (Lotus scoparius) 2.5 1 arroyo lupine (Lupinus succulentus) 1 1 dot-seed plantain (Plantago erecta) 3.5 3.5 bicolor everlasting (Pseudognaphalium biolettii) 1 0.1 chia (Salvia columbariae) 1 1 Total 18 15 60-Day Monitoring Following the 60-day monitoring visit during the 90-day PEP, it was determined that supplemental container plants would be needed in the upland area to comply with 90-day success standards. An upland native plant palette was recommended by AECOM in the 60-day monitoring report and was installed by Nature’s Image prior to the end of the PEP. The supplemental container planting for the upland area included the species and quantities listed in Table 7. All species planted were 1-gallon containers. As the supplemental planting occurred in late summer (not ideal planting time), two 1-quart DriWater containers were installed with each plant. In addition, periodic supplemental watering also occurred. Encinas Creek Bridge Replacement Project Page 10 Year 1 Revegetation Monitoring Report Table 7. Disturbed Upland – Container Plant Palette Common Name (Botanical Name) Quantity for 0.255-Acre Area California buckwheat (Eriogonum fasciculatum ssp. fasciculatum) 15 deerweed (Lotus scoparius) 15 golden yarrow (Eriophyllum confertiflorum) 10 Menzies’ goldenbush (Isocoma menziesii var. menziesii) 15 sawtoothed goldenbush (Hazardia squarrosa) 15 Total 70 Year 1 Site Maintenance: Site maintenance during Year 1 included exotic vegetation removal, herbicide application, and trash removal on a minimum of a quarterly basis. Exotic vegetation was removed either by hand pulling the plants or via herbicide application. When hand pulled, exotic vegetation was pulled out of the soil from the roots to inhibit regrowth. Hand-pulled vegetation was removed from the site and disposed of at a proper location. Herbicide application was performed when favorable conditions occurred, including low wind and lack of precipitation. Only herbicide approved for use near water (such as Rodeo ®) was used at the revegetation site so that water contamination did not occur. Supplemental Planting: In an effort to increase native cover within the freshwater marsh area and the lower slopes, AECOM harvested and planted these areas with emergent and saltmarsh species collected from the immediate surroundings. Supplemental plantings included alkali heath (Frankenia salina), saltgrass (Distichilus spicata), and pickleweed (Salicornia virginica) harvested from the adjacent saltmarsh habitat in addition to mulefat (Baccharis salicifolia), cattails, and bulrush. Supplemental Seeding: Due to low seed germination, ground disturbance from unauthorized vehicle use, and the wastewater treatment plants access to the site, AECOM deemed it appropriate to conduct supplemental seeding in the upland areas. In November 2010, a modified seed mix (Table 6) was placed on site using a broadcast seeding method in which the seed is mixed with sand and hand tossed throughout the site. To maximize germination, this seeding effort was conducted in concert with an impending rain event. Page 11 Encinas Creek Bridge Replacement Project Year 1 Revegetation Monitoring Report 2.0 METHODOLOGY Year 1 annual monitoring was completed by AECOM Restoration Ecologists Mandy Lemig and Lindsay Teunis on June 30, 2011, beginning at 8:00 a.m. Weather conditions were sunny, with winds less than 5 miles per hour and an approximate temperature of 70 degrees Fahrenheit (°F). Monitoring for the site occurred quarterly. The following section describes the qualitative and quantitative methods used to assess the restoration site’s progress relative to the previously described performance criteria. 2.1 Quantitative Monitoring Quantitative monitoring for this project consists of assessing container plant survival, which is described in further detail below. 2.1.1 Container Plant Survival Container plant survival is one factor used to evaluate the performance of the restoration site. Due to the small size of the restoration site, the methodology for assessing survival is calculated by counting the planted species that exhibit a healthy condition within the restoration site’s limits. Any container plant mortality observed is subtracted from the total number of plants installed and used to calculate percent survival. These data are recorded during regular site visits and during the annual restoration site assessment. While monitoring was recorded quarterly, container plant survival was assessed during each monitoring visit (monthly) during Year 1 so that any remediation measures could be addressed immediately. According to the Revegetation Specifications (AECOM 2009), container plants were only specified in the CVFM habitat within the project area. The species list and quantities are listed in Table 4, Section 1.5, in this report. After the 60-day monitoring visit during the 90-day plant establishment period, it was determined that the disturbed upland habitat within the project area would require some container plants in order to meet native cover requirements established for the end of the 90-day period. The species list and quantities are listed in Table 6, Section 1.5 in this report. In addition, periodic supplemental planting was performed in the coastal and freshwater marsh habitat during Year 1 to increase native cover and prevent erosion. Encinas Creek Bridge Replacement Project Page 12 Year 1 Revegetation Monitoring Report 2.2 Qualitative Monitoring During Year 1, qualitative monitoring occurred during regular site visits and the annual monitoring event on June 30, 2011. During qualitative monitoring site visits, the restoration ecologist identified any issues that need immediate attention (e.g., exotic species requiring removal, trash, erosion, and any other significant observations). Qualitative monitoring was conducted by a qualified restoration ecologist and consisted of walking the project site to assess general health of native plant species, emergent native seedlings, soil conditions, presence exotic species, and erosion problems. In addition to visual assessments, permanent photostations were established prior to installation in an effort to capture the extent of the restoration site with respect to the vegetation community both in and adjacent to the site. There are eight permanent photo locations on site, which are shown in Figure 3. When possible, the qualitative site inspections are combined with the maintenance periods to facilitate the immediate resolution of maintenance issues. During Year 1, qualitative site visits were conducted monthly at a minimum with visits by the project ecologist, Lindsay Teunis, on the following dates: • August 26, 30, and 31, 2010 • September 28, 2010 • October 5, 2010 • November 2 and 22, 2010 • December 20 and 23, 2010 • January 20, 2011 • February 22, 2011 • March 15, 2011 • April 15, 2011 • May 19, 2011 • June 30, 2011 3.0 RESULTS AND COMPARISON TO PERFORMANCE CRITERIA The following section presents the results of the quarterly quantitative and qualitative monitoring efforts from the Year 1 monitoring event. 3.1 Quantitative Monitoring Results Container plant survival rate and the absolute percent native cover assessments are presented below, along with a comparison to the project performance criteria. Page 13 Encinas Creek Bridge Replacement Project Year 1 Revegetation Monitoring Report 3.1.1 Container Plant Survival Assessment Regular site visits were performed by AECOM during Year 1 to quantify the health of the restoration site based on container plant survival for both the upland and wetland species. Table 8 describes the summary data for the survival of container plant species from the quarterly estimates, beginning in August 2010 and ending on June 30, 2011. The container plant survival percentages for September 2010 are based on qualitative observations of the initial 70 one-gallon container plants installed in the upland area and 20 one-gallon container plants installed in the wetland in August 2010. The remaining quarterly estimates of percent survival are based on those container plants surviving at the previous time period in addition to any supplemental planting that occurred to compensate for the initial loss. Table 8. Percent Container Plant Survival during Year 1 % Survival Month1 September 20102 December 20103 March 20113 June 20113 Upland 60 100 100 100 Wetland 50 90 100 100 1 Container plant survival was conducted quarterly during Year 1. 2 Survival percentages for September 2010 are based on qualitative observations of 70 one-gallon container plants in the upland and 20 one-gallon plants in the wetland. 3 Survival percentages for December 2010 and March 2011 are based on qualitative observations of the surviving one-gallon container plants from initial planting and additional supplemental planting that occurred. Container planting at the Encinas Bridge Revegetation Site consisted of the plants specified in the Revegetation Specifications (AECOM 2009) for the CVFM habitat (wetland) and supplemental upland habitat planting deemed necessary during the 90-day plant establishment period. In addition, supplemental planting of emergent marsh species occurred periodically during Year 1 to bring the wetland plant survivability to 100 percent of the original plant quantities recommended in the Revegetation Specifications. It should be noted that the only formal container plant success standard pertains to the CVFM habitat as the upland habitat was supplemental, however, both areas are achieving 100 percent survival based on the initial planting quantities. 3.2 Qualitative Analysis During the annual site assessment conducted on June 30, 2011, observations were made of flora within and adjacent to the restoration site and bare ground, and of the health of both planted/seeded and volunteer native species. Photostations were used to qualitatively analyze the Encinas Creek Bridge Replacement Project Page 14 Year 1 Revegetation Monitoring Report native plant establishment during Year 1 (Attachment 3, Photos 1 through 16). A list was compiled of all plant species within the site in addition to species occurring in the immediate vicinity (Table 9). On June 30, 2011, a total of 33 species were observed in the restoration site, 25 of which are native. Table 9. Encinas Creek Year 1 Species List Family Scientific Name Common Name In Project Area Adjacent Aizoaceae Carpobrotus edulis* hottentot fig X X Asteraceae Ambrosia psilostachya Western ragweed X X Baccharis pilularis coyotebush X Baccharis salicifolia mulefat X Deinandra sp. tarweed X X Eriophyllum confertiflorum golden yarrow X X Hazardia squarrosa sawtoothed goldenbush X Heliotropium curassavicum salt heliotrope X X Heterotheca grandiflora telegraph weed X X Isocoma menziesii Menzies’ goldenbush X X Pluchea odorata marsh fleabane X Pseudognaphalium californicum California cudweed X X Xanthium spinosum* spiny cocklebur X X Brassicaceae Cakile maritima* sea rocket X X Matthiola incana* stock X X Caryophyllaceae Polycarpon tetraphyllum* fourleaf manyseed X Chenopodiaceae Chenopodium album* lamb’s quarters X X Salicornia virginica pickleweed X X Cyperaceae Bolboschoenus californicus California bulrush X Bolboschoenus robustus sturdy bulrush X Schoenoplectus acctus common tule X Schoenoplectus americanus three square bulrush X Euphorbiaceae Chamaesyce pediculifera spurge X X Croton californicus California croton X Fabaceae Lotus scoparius deerweed X Frankeniaceae Frankenia salina alkali heath X X Lamiaceae Salvia columbariae chia X X Plantaginaceae Plantago erecta dotseed plantain X Poaceae Distichilus spicata saltgrass X X Limonium sinuatum* statice X X Polygonaceae Eriogonum fasciculatum California buckwheat X Polygonum arenastrum* oval-leaf knotweed X X Typhaceae Typha latifolia broad-leave cattail X X *Indicates a nonnative plant species (introduced). The approximate native vegetative cover observed within the CVFM habitat was approximately 10 to 15 percent with only traces of nonnative species observed. This portion of the site is Page 15 Encinas Creek Bridge Replacement Project Year 1 Revegetation Monitoring Report composed of large cobble and coarse sand and has a heavy saltwater influence from the wave action and infiltration from the adjacent Pacific Ocean. In addition, some erosion has occurred along the toe of the slope lining the creek channel. The native cover is lower than the success standards outlined in the Revegetation Specifications for Year 1 (Table 2), but this is not unusual considering the prevalence of cobble, heavy saltwater influence, and erosion within this habitat on site. Although lower than the success standard, the density of the existing CVFM within the project site is very similar the habitat prior to construction which was low (Attachment 3, Photo 23). In addition the existing habitat supports a higher diversity of species and low nonnative cover relative to the impacted habitat. The low nonnative cover within the wetland is meeting the success standard for Year 1. It should be noted that the new bridge footprint is smaller than the original bridge footprint thereby providing additional acreage for CVFM (Figure 3). The approximate native vegetative cover observed within the upland habitat was approximately 50 percent with some areas achieving greater than 80 percent cover. The observed nonnative species occurred at very low densities within the upland habitat and covered less than 1 percent of the area. Nonnative cover is meeting the Year 1 success standards and native cover is on track to meet Year 2 (Table 3). Although there are no specific success standards for the two revegetated vehicle pull-out areas, qualitative monitoring occurred as part of Year 1 monitoring. The approximate native vegetative cover at the pull-out site north of the bridge is approximately 80 percent (Attachment 3, Photo 17). The native cover in this area is greater than it was before the beginning of the bridge replacement and can be considered successful. The approximate native vegetative cover at the pull-out site south of the bridge is approximately 40 percent (Attachment 3, Photo 18). Non- native vegetative cover at both pull-out sites is less than 5 percent. In addition to treating nonnative species within the project boundary, the pampas grass (Cortaderia selloana) population located immediately east of the project area was treated with herbicide during Year 1 and has not regenerated. 4.0 CONCLUSION AND RECOMMENDATIONS The following section includes the conclusions from Year 1 monitoring in addition to recommendations for Year 2. Encinas Creek Bridge Replacement Project Page 16 Year 1 Revegetation Monitoring Report 4.1 Conclusions Based on the data presented in this annual monitoring report, the restoration site is continuing to function as designed and is on track to meeting Year 2 success standards. Quantitatively, container plant survival is meeting the 100 percent survival success standard in the wetland and upland area (with only minimal supplemental or replacement planting). Qualitatively, native vegetative cover is meeting the success standards for the upland habitat. Although native vegetative cover for the CVFM is below success standards for Year 1, the area is showing signs of natural propagation of the existing species and is already higher quality (higher species richness and low nonnative cover) relative to the habitat prior to construction. In addition, it should be noted that the wetland cover post-construction is higher than the wetland cover prior to construction (Attachment 3, Photo 23). Native cover is expected to continue to increase with additional propagation of native species from both the existing native species around the site and the surviving container plants. In addition, minimal supplemental planting and seeding will take place in Year 2 (see recommendations below). The native vegetation within the site is continuing to increase and is expected to meet Year 2 criteria on schedule. Non-native vegetative cover over the entire site is meeting the Year 1 success standards of less than 1 percent and is expected to meet the Year 2 success standard. 4.2 Recommendations The following are recommendations to maximize site performance. All recommendations are within the current scope of work and will be implemented by AECOM. These measures are recommended in an effort to meet success standards outlined in the Revegetation Specifications (AECOM 2009) for Year 2 (Tables 2 and 3). 1. The following actions are recommended to increase native cover within the CVFM habitat: a. Emergent alkali heath, saltgrass and pickleweed can be harvested from areas adjacent to the site and planted within the marsh habitat to enhance native cover and reduce erosion potential, specifically along the toe of the slope. b. Marsh fleabane seed can be collected from existing plants on site and directly seeded within the marsh habitat on site. c. Supplemental plantings of mulefat, bulrush and cattail, collected from near the site can be installed during Year 2 to increase native cover in the marsh habitat. Page 17 Encinas Creek Bridge Replacement Project Year 1 Revegetation Monitoring Report d. Although planting should ideally occur in winter months, we recommend a small effort this summer to attempt to establish root structure along the slope. 2. The following actions are recommended to increase native cover within the upland habitat: a. Supplemental seeding is recommended for the bare ground area within the upland habitat. The same seed mix previously used can be applied for supplemental seeding. This action should occur in the fall months (October through early December) and should be coordinated with an impending rain event. b. Supplemental planting and seeding is recommended for the vehicle pull-out area south of the site. Soil decompaction using hand tools is recommended before planting the area. The same supplemental plant palette can be used for this area. This action should occur in the fall months (October through early December) to benefit from natural rain events and increase chance of survival. One DriWater container should be installed with each container plant to further facilitate survival and growth. 3. As the rainy season (considered October through April) approaches erosion control measures such as straw wattles and sand bags should be placed along the top of the bridge wingwalls along the east side to limit erosion and impacts to the revegetated slopes. REPORT CERTIFICATION "I certify under penalty of law that I have personally examined and am familiar with the information submitted in this document and all attachments and that, based on my inquiry of those individuals immediately responsible for obtaining the information, I believe that the information is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment." Sherri Howard, City of Carlsbad, Project Manager Encinas Creek Bridge Replacement Project Page 18 Year 1 Revegetation Monitoring Report This page intentionally left blank. ATTACHMENT 1 30-DAY REVEGETATION MEMO AECOM 1420 Kettner Boulevard Suite 500 San Diego, CA 92101 www.aecom.com 619.233.1454 tel 619.233.0952 fax July 7, 2010 Mr. Jacob Moeder, Project Manager City of Carlsbad 1635 Faraday Avenue Carlsbad, CA 92008 Dear Mr. Moeder: This letter is being submitted as documentation of the 30-day monitoring of the revegetation area associated with the Encinas Creek Bridge Replacement Project (project). Overview Construction activities associated with the replacement of Encinas Creek Bridge were conducted between February 16 and May 28, 2010. Revegetation of the temporary disturbance areas was completed over the course of 3 days, May 26 to 28, 2010. The roadway re-opened to traffic on May 28, 2010. The project is currently in the 90-day revegetation maintenance and monitoring period. Mitigation is required by various project permits, as shown in the table below. Mitigation is occurring on-site at a 1:1 replacement ratio within the temporary impact areas. Two primary habitats were impacted: coastal and valley freshwater marsh (CVFM) (0.004 acre) and disturbed upland (0.255 acre). Revegetation installation and maintenance during the 90-day plant establishment period is the responsibility of the contractor (Burt Salas) and subcontractor (Nature’s Image). Revegetation installation occurred from May 26 to May 28, 2010, per the revegetation specifications (AECOM 2009). Revegetation included two distinct seed mixes (upland and wetland mixes) and a combination of hydroseeding and container planting. PERMITS California Regional Water Quality Control Board (RWQCB), 401 Water Quality Certification (09C-046) California Coastal Commission (CCC), Coastal Development Permit 6-09-051 U.S. Army Corps of Engineers (USACE), Section 404, Nationwide Permit 14 Linear Transportation Projects, general terms and conditions California Department of Fish and Game (CDFG), Lake or Streambed Alteration Notification No. 1600-2009-0168-R5 Carlsbad Planning Commission Resolutions No. 6624–6627 Department of Parks and Recreation Right of Entry Permit, 30 April 2009 Encinas Creek Bridge Replacement Project – Temporary Impact Revegetation Specifications Encinas Creek Bridge Replacement Project Mitigation Monitoring and Reporting Program (MMRP) AECOM has been tasked by the City of Carlsbad (City) to conduct site visits at 30-day intervals to document the site’s progress, including photo documentation, identification of presence of species that need to be weeded, and suggestion of additional remedial measures that need to be implemented by the contractor. This letter documents the results of AECOM’s 30-day monitoring visit. 30-Day Site Visit Summary The following is a summary of the project biologist’s observations of the Encinas Creek Bridge Replacement Project on June 28, 2010. Mr. Jacob Moeder, Project Manager City of Carlsbad July 7, 2010 Page 2 Surveyor: Lindsay Teunis, Restoration Ecologist/Project Biologist Monitoring Date, Time, and Conditions: June 28, 2010; 8:00 a.m.; overcast; wind less than 1 mile per hour; approximately 60°F Site Condition (Excellent, Good, Fair, Needs Improvement): Fair The maintenance contractor (Natures Image) has been visiting the site twice a week to water and weed as necessary. To date, no seedlings have emerged from the hydroseed mix. Approximately 20, 1-gallon emergent container plants were planted adjacent to the channel to supplement the recovery of the impacted freshwater marsh. Currently, many of these plants appear dead or significantly stressed. It is difficult to determine the cause of this, which could include planting in the summer and the lack of freshwater flowing at this time of year. The plants were likely propagated using only freshwater and may be experiencing some shock. Although water is observed in the channel, it appears to be predominantly saltwater at this time, resulting from the wave action of the adjacent beach. The site was evaluated for presence of non-native species. A small pre-existing patch of arundo is beginning to develop on the southeast corner of the project area. No other nonnative species were observed in the revegetation area during the 30-day monitoring visit. All erosion control materials were in good condition, and no erosion was observed in the revegetation area. Recommendations: At this time, no specific remediation is recommended. However, should the stressed container plants not survive or recover the container plants may need to be replaced. This will be assessed during the 60-day monitoring visit and replanting may be recommended at that time. Natures Image should continue frequent watering (twice per week) of the site through the summer months and should continue weeding at regular intervals. In addition, Natures Image should begin treatment of the small patch of arundo resprouting in the southeast corner of the site. Arundo is a highly invasive species and should be treated immediately following resprouting. Fresh new sprouts (less than 5 inches tall) were observed in the area. It is recommended that herbicide application occur in approximately 2 weeks or when the sprouts have grown to approximately 1 foot. Arundo growth should be monitored bi-monthly thereafter, to assess the need for future treatments. Mr. Jacob Moeder, Project Manager City of Carlsbad July 7, 2010 Page 3 The 60-day site visit is schedule for Monday, July 26, 2010. Please contact me if you have any questions or comments at (619) 233-1454 or lindsay.teunis@aecom.com. Sincerely, Lindsay Teunis Project Biologist 07080213 Encinas Creek 30-day Monitoring Memo_MF_LTE-TE Car l sbadBoul evardCar l sbadBoul evar d[Sout hbound] [Nor t hbound]PacificOc e a nE n c i n a s Cr e e k New Bridge Footprint Old Bridge Footprint Temporary Construction Impact Area 100-footBufferofTemporary ConstructionImpactArea 100-f ooRoa dRi ght Encinas Creek Bridge Replacement Project Source: DigitalGlobe 2008 / Project Data -- City of Carlsbad 2009 ; SanGIS 2009/ EDAW 2009 Scale: 1 = 1,500; 1 inch = 125 feet Path: P:\2007\07080213.01 Encinas Creek Bridge Replacement\6.0 GIS\6.3 Layout\fig_site_footprint_8x11.mxd, 08/24/09, AugelloP I Revegetation Monitoring Permanent Photo Stations 5210521 62.5 Feet New Bridge Footprint Photo Station Study Area Boundary LEGEND i!(1i!(7 i!(8i!(6 i!(5 i!(5 i!(4 i!(3 i!(2 January 2009 Pre-Construction Photos (taken during jurisdictional delineation) Photograph: 1 Photo Date: 1/8/2009 Location: Permanent Station 1 Direction: northwest Comment: Note ice plant covering slopes adjacent to channel. Photograph: 2 Photo Date: 1/8/2009 Location: View of freshwater marsh on north side of channel Direction: northwest Comment: Note ice plant covering slopes adjacent to channel. May 2010 Pre-Revegetation Photos Photograph: 1 Photo Date: 5/25/2010 Location: Permanent Station 1 Direction: northwest Comment: Pink flags mark location for 1-gallon container plants. Photograph: 2 Photo Date: 5/25/2010 Location: Permanent Station 2 Direction: South Comment: None Photograph: 3 Photo Date: 5/25/2010 Location: on-site Direction: N/A Comment: Supplemental photo of emergent container species for freshwater marsh. Photograph: 4 Photo Date: 5/24/2010 Location: Permanent Station 4 Direction: East Comment: Prior to plant installation. Water in channel at this time is primarily saltwater from wave splash. Photograph: 5 Photo Date: 5/24/2010 Location: Permanent Station 5 Direction: East Comment: Prior to plant installation. Water in channel at this time is primarily saltwater from wave splash. May 2010 Post-Revegetation Installation Photos Photograph: 1 Photo Date: 5/26/2010 Location: Permanent Station 1 Direction: West Comment: None Photograph: 2 Photo Date: 5/26/2010 Location: View of Permanent Station 4 Direction: Northeast Comment: Note, hay matte covering hydroseeded slopes. Photograph: 3 Photo Date: 5/26/2010 Location: View of Permanent Station 5 Direction: North Comment: Note flagging marking container plants at base of slope. Photograph: 4 Photo Date: 5/26/2010 Location: View of Permanent Station 6 Direction: Southeast Comment: Note thriving saltmarsh in background. Flooding from construction pushed back ice plant, allowing saltmarsh species to grow. Photograph: 5 Photo Date: 5/26/2010 Location: Permanent Station 7 Direction: North Comment: Slope and terrace seeded with upland mix. Photograph: 6 Photo Date: 5/26/2010 Location: Permanent Station 8 Direction: North Comment: Additional area seeded with upland mix. June 2010 30-Day Site Visit Final Permanent Photo Stations Photograph: 1 Photo Date: 6/28/2010 Location: Permanent Station 1 Direction: West Comment: None Photograph: 2 Photo Date: 6/28/2010 Location: Permanent Station 2 Direction: Southwest Comment: None Photograph: 3 Photo Date: 6/28/2010 Location: Permanent Station 3 Direction: Southwest Comment: No weeds on-site at this time. A small arundo patch may begin to reemerge immediately upstream (right in photo) of the seeded area. Photograph: 4 Photo Date: 6/28/2010 Location: Permanent Station 4 Direction: West Comment: Water in channel at this time is primarily saltwater from wave splash. Many of the container plants appear to be dying. Photograph: 5 Photo Date: 6/28/2010 Location: Permanent Station 5 Direction: West Comment: Water in channel at this time is primarily saltwater from wave splash. Many of the container plants appear to be dying. Photograph: 6 Photo Date: 6/28/2010 Location: Permanent Station 6 Direction: South Comment: No weeds on-site at this time. No native plants have emerged yet. Photograph: 7 Photo Date: 6/28/2010 Location: Permanent Station 7 Direction: North Comment: No weeds on-site at this time. No native plants have emerged yet. Photograph: 8 Photo Date: 6/28/2010 Location: Permanent Station 8 Direction: North Comment: Additional upland impact area seeded. No weeds at this time. ATTACHMENT 2 60-DAY REVEGETATION MEMO AECOM 1420 Kettner Boulevard Suite 500 San Diego, CA 92101 www.aecom.com 619.233.1454 tel 619.233.0952 fax August 6, 2010 Mr. Jacob Moeder, Project Manager City of Carlsbad 1635 Faraday Avenue Carlsbad, CA 92008 Subject: Encinas Creek Regevetation 60-Day Monitoring Memo Dear Mr. Moeder: This letter is being submitted as documentation of the 60-day monitoring of the revegetation area associated with the Encinas Creek Bridge Replacement Project (project). Overview Construction activities associated with the replacement of Encinas Creek Bridge were conducted between February 16 and May 28, 2010. Revegetation of the temporary disturbance areas was completed over the course of 3 days, May 26 through 28, 2010. The roadway reopened to traffic on May 28, 2010. The project is currently in the 90-day revegetation maintenance and monitoring period. Mitigation is required by various project permits, as shown in the table below. Mitigation is occurring on-site at a 1:1 replacement ratio within the temporary impact areas. Two primary habitats were impacted: coastal and valley freshwater marsh (CVFM) (0.004 acre) and disturbed upland (0.255 acre). Revegetation installation and maintenance during the 90-day plant establishment period is the responsibility of the contractor (Burt Salas) and subcontractor (Nature’s Image). Revegetation installation occurred from May 26 through May 28, 2010, per the revegetation specifications (AECOM 2009). Revegetation included two distinct seed mixes (upland and wetland mixes) and a combination of hydroseeding and container planting. PERMITS California Regional Water Quality Control Board (RWQCB), 401 Water Quality Certification (09C-046) California Coastal Commission (CCC), Coastal Development Permit 6-09-051 U.S. Army Corps of Engineers (USACE), Section 404, Nationwide Permit 14 Linear Transportation Projects, general terms and conditions California Department of Fish and Game (CDFG), Lake or Streambed Alteration Notification No. 1600-2009-0168-R5 Carlsbad Planning Commission Resolutions No. 6624–6627 Department of Parks and Recreation Right of Entry Permit, April 30, 2009 Encinas Creek Bridge Replacement Project – Temporary Impact Revegetation Specifications Encinas Creek Bridge Replacement Project Mitigation Monitoring and Reporting Program (MMRP) Mr. Jacob Moeder Project Manager, City of Carlsbad August 6, 2010 Page 2 AECOM has been tasked by the City of Carlsbad (City) to conduct site visits at 30-day intervals to document the site’s progress, including photo documentation, identification of presence of species that need to be weeded, and suggestion of additional remedial measures that need to be implemented by the contractor. This letter documents the results of AECOM’s 60-day monitoring visit. 60-Day Site Visit Summary The following is a summary of the project biologist’s observations of the Encinas Creek Bridge Replacement Project on July 27, 2010. Surveyor: Michelle Fehrensen, Biologist/Regulatory Specialist Monitoring Date, Time, and Conditions: June 27, 2010; 11:00 a.m.; overcast; wind less than 1 mile per hour; approximately 60°F Site Condition (Excellent, Good, Fair, Needs Improvement): Needs Improvement The 90-day success standards, as outlined in the Contractor Specifications for the project site, are shown in Tables 1 and 2 below. Table 1. Coastal and Valley Freshwater Marsh Success Standards Success Standard 90-Day Plant Establishment Period1 Year 1 Year 2 Remedial Measures if Standard Is Not Being Met Container Plant Survival 100 percent 100 percent 100 percent Replant as needed to maintain survival standard; increase plant care (e.g., watering) as needed. Native Seed Germination and Cover 20 percent cover from seeded species and volunteers 60 percent cover from seeded species and volunteers 90 percent cover from seeded species and volunteers Reseed as needed; increase plant care (e.g., watering) and weed control as needed. Weed Control Weed cover under 5 percent and no invasive exotics Weed cover under 1 percent and no invasive exotics 0 percent weeds Increase weed control. Trash and Debris No trash or debris No trash or debris No trash or debris Remove trash and debris as needed. Erosion Control No gully formation or associated sediment transport No gully formation or associated sediment transport No gully formation or associated sediment transport Repair erosion and install and maintain appropriate erosion control materials to prevent erosion. 1 The initial plant establishment period of 90 days is the responsibility of the Contractor. Following successful completion of the plant establishment period, the remaining maintenance and monitoring requirements will be the responsibility of the City. Mr. Jacob Moeder Project Manager, City of Carlsbad August 6, 2010 Page 3 Table 2. Disturbed Upland Habitat Success Standards Success Standard 90-Day Plant Establishment Period1 Year One Year Two Remedial Measure if Standards is Not Being Met Seed Germination and Cover 15 percent cover from seeded species and volunteers (native species and nonproblematic weeds) 50 percent cover from seeded species and volunteers (native species and nonproble- matic weeds) 80 percent cover from seeded species and volunteers (native species and nonproblematic weeds) Reseed as needed; increase plant care (e.g., watering) as needed. Weed Control2 Cover of problematic invasive exotics under 5 percent Cover of problematic invasive exotics under 1 percent 0 percent cover of problematic invasive exotics Increase weed control of problematic invasive exotics. Trash and Debris No trash or debris No trash or debris No trash or debris Remove trash and debris as needed. Erosion Control No gully/rill formation or associated sediment transport No gully/rill formation or associated sediment transport No gully/rill formation or associated sediment transport Repair erosion and install and maintain appropriate erosion control materials to prevent erosion. 1 The initial plant establishment period of 90 days is the responsibility of the Contractor. Following successful completion of the plant establishment period, the remaining maintenance and monitoring requirements will be the responsibility of the City. 2 Problematic invasive exotics are defined here as plants listed by Cal-IPC as “moderate” or “high” threats to California wildlands; www.cal-ipc.org. The project site is currently not on track to meet a few of the primary success standards for the 90-day plant establishment period including container plant survival (100 percent), seed germination and native cover. To date, minimal to no seedlings have emerged from the hydroseed mix. One Ambrosia psilostachya (western ragweed) was observed on the north bank in the upland seed mix area. Approximately twenty 1-gallon emergent container plants were planted adjacent to the channel to supplement the recovery of the impacted freshwater marsh. Currently, at least six of these plants are completely dead and several others appear significantly stressed. It is difficult to determine the cause of this; however, it is likely a combination of factors that are inhibiting the success of the wetland plantings, including planting out of the rainy season (May 2010) and the lack of freshwater flowing at this time of year. The plants were likely propagated using only freshwater or brackish water and may be experiencing some shock. Although water is observed in the channel, it appears to be predominantly saltwater at this time, resulting from the wave action of the adjacent beach. In addition to assessing the progress of the revegetation effort, the site was evaluated for presence of nonnative species, trash, and erosion issues. Weeding is being completed at regular intervals and minimal to no nonnative species were observed in the revegetation Mr. Jacob Moeder Project Manager, City of Carlsbad August 6, 2010 Page 4 area during the 60-day monitoring visit. One plant on the south bank of the upland area was not identified in the field but may be the nonnative Kochia scoparia. This plant may be allowed to continue to grow until proper identification can be made (e.g., larger size or blooming period). No trash or debris was observed on-site and all erosion control materials were in good condition, and no erosion was observed in the revegetation area. Photo monitoring at the permanent photo stations is being conducted at each site visit. See Attachment 1 for the photos taken on July 27, 2010. Recommendations: Traditionally, it is recommended that planting of upland species occur in the fall to take advantage of the rain and natural growing season of Southern California species; however, if the contractor intends to reach the 90-day success criteria by the end of August, supplemental planting should occur immediately. At this time, it is recommended that the upland area be supplemented with container plantings and that dead or dying wetland emergent container plants be replaced. All dead plant material should be left in place with replacement containers planted adjacent to the original plant. The following table provides recommended upland species for planting in the revegetation area. The Project Biologist (Ms. Lindsay Teunis) has confirmed with Tree of Life that all species are available for immediate purchase. Table 3. Plant Species Recommended for Supplemental Upland Planting Common Name Species Size/Quantity California buckwheat Eriogonum fasciculatum ssp. Fasciculatum 1 gal./15 Deerweed Lotus scoparius 1 gal./15 Golden yarrow Eriophyllum confertiflorum 1 gal./10 Menzies’ goldenbush  Isocoma menziesii var. menziesii 1 gal./15  Sawtoothed goldenbush Hazardia squarrosa 1 gal./15 Nature’s Image should continue frequent watering (twice per week) of the site through the summer months and should continue weeding at regular intervals. In addition, two 1-quart reusable DriWater containers should be installed at each container plant location so newly planted container plants can survive through the summer. The 90-day site visit is scheduled for Monday, August 30, 2010. At this meeting, AECOM’s biologist will assess the site against the established success criteria for the plant establishment period, as outlined in the tables above. Mr. Jacob Moeder Project Manager, City of Carlsbad August 6, 2010 Page 5 AECOM is available to discuss these recommendations further upon request and is also available to discuss alternative solutions. Please contact me if you have any questions or comments at (619) 233-1454 or lindsay.teunis@aecom.com. Sincerely, Lindsay Teunis Project Biologist 07080213 Encinas Creek 60-day Monitoring Letter Rpt.doc Car l sbadBoul evardCar l sbadBoul evar d[Sout hbound] [Nor t hbound]PacificOc e a nE n c i n a s Cr e e k New Bridge Footprint Old Bridge Footprint Temporary Construction Impact Area 100-footBufferofTemporary ConstructionImpactArea 100-f ooRoa dRi ght Encinas Creek Bridge Replacement Project Source: DigitalGlobe 2008 / Project Data -- City of Carlsbad 2009 ; SanGIS 2009/ EDAW 2009 Scale: 1 = 1,500; 1 inch = 125 feet Path: P:\2007\07080213.01 Encinas Creek Bridge Replacement\6.0 GIS\6.3 Layout\fig_site_footprint_8x11.mxd, 08/24/09, AugelloP I Revegetation Monitoring Permanent Photo Stations 5210521 62.5 Feet New Bridge Footprint Photo Station Study Area Boundary LEGEND i!(1i!(7 i!(8i!(6 i!(5 i!(5 i!(4 i!(3 i!(2 Attachment 1 REVEGETATION PHOTO MONITORING July 2010 60-Day Site Visit Final Permanent Photo Stations Photograph: 1 Photo Date: 7/27/2010 Location: Permanent Station 1 Direction: West Comment: None Photograph: 2 Photo Date: 7/27/2010 Location: Permanent Station 2 Direction: Southwest Comment: None Photograph: 3 Photo Date: 7/27/2010 Location: Permanent Station 3 Direction: Southwest Comment: None Photograph: 4 Photo Date: 7/27/2010 Location: Permanent Station 4 Direction: West Comment: Water in channel at this time is primarily saltwater from wave splash. Many of the container plants appear to be dying. Photograph: 5 Photo Date: 7/27/2010 Location: Permanent Station 5 Direction: West Comment: Water in channel at this time is primarily saltwater from wave splash. Many of the container plants appear to be dying. Photograph: 6 Photo Date: 7/27/2010 Location: Permanent Station 6 Direction: South Comment: No weeds on-site at this time. No native plants have emerged yet. Photograph: 7 Photo Date: 7/27/2010 Location: Permanent Station 7 Direction: North Comment: No weeds on-site at this time. No native plants have emerged yet. Photograph: 8 Photo Date: 7/27/2010 Location: Permanent Station 8 Direction: North Comment: Additional upland impact area seeded. No weeds at this time. Vehicle tracks evident. ATTACHMENT 3 PHOTO MONITORING Attachment 3, Page 1 of 12 Encinas Creek Bridge Replacement Project Year 1 Annual Monitoring Site Visit Installation and Year 1 Photos – Permanent Stations Photograph: 1 Photo Date: 6/28/2010 Location: Permanent Station 1 Direction: West Comment: None Photograph: 2 Photo Date: 6/30/2011 Location: Permanent Station 1 Direction: West Comment: Sea rocket visible on south slope. The species was mistaken by the maintenance crew. All sea rocket was removed following this site visit. Attachment 3, Page 2 of 12 Photograph: 3 Photo Date: 6/28/2010 Location: Permanent Station 2 Direction: Southwest Comment: None Photograph: 4 Photo Date: 6/30/2011 Location: Permanent Station 2 Direction: Southwest Comment: Note channel is primarily dry in the wetland revegetation area. No fresh water is entering the creek at this time. Attachment 3, Page 3 of 12 Photograph: 5 Photo Date: 6/28/2010 Location: Permanent Station 3 Direction: Southwest Comment: No weeds on site at this time. A small arundo patch may begin to reemerge immediately upstream (right in photo) of the seeded area. Photograph: 6 Photo Date: 6/30/2011 Location: Permanent Station 3 Direction: Southwest Comment: Hydroseed is not sprouting. This is likely due to the season. Attachment 3, Page 4 of 12 Photograph: 7 Photo Date: 6/28/2010 Location: Permanent Station 4 Direction: East Comment: Water in channel at this time is primarily saltwater from wave splash. Many of the container plants appear to be dying. Photograph: 8 Photo Date: 6/30/2011 Location: Permanent Station 5 Direction: West Comment: Water in channel at this time is primarily saltwater from wave splash. Many of the container plants appear to be dying. Replant in late fall. Attachment 3, Page 5 of 12 Photograph: 9 Photo Date: 6/28/2010 Location: Permanent Station 5 Direction: East Comment: Water in channel at this time is primarily saltwater from wave splash. Many of the container plants appear to be dying. Photograph: 10 Photo Date: 6/30/2011 Location: Permanent Station 4 Direction: West Comment: Water in channel at this time is primarily saltwater from wave splash. Many of the container plants appear to be dying. Replant in late fall. Attachment 3, Page 6 of 12 Photograph: 11 Photo Date: 6/28/2010 Location: Permanent Station 6 Direction: South Comment: No weeds on site at this time. No native plants have emerged yet. Photograph: 12 Photo Date: 6/30/2011 Location: Permanent Station 6 Direction: South Comment: Few weeds on site at this time. No native plants have emerged yet. Attachment 3, Page 7 of 12 Photograph: 13 Photo Date: 6/28/2010 Location: Permanent Station 7 Direction: North Comment: No weeds on site at this time. No native plants have emerged yet. Photograph: 14 Photo Date: 6/30/2011 Location: Permanent Station 7 Direction: North Comment: Few weeds on site at this time. No native plants have emerged yet. Note split rail fence installed by City to protect area from cars pulling out. Attachment 3, Page 8 of 12 Photograph: 15 Photo Date: 6/28/2010 Location: Permanent Station 8 Direction: North Comment: Additional upland impact area seeded. No weeds at this time. Photograph: 16 Photo Date: 6/30/2011 Location: Permanent Station 8 Direction: North Comment: Additional upland impact area seeded. Few weeds at this time, including sea rocket. Attachment 3, Page 9 of 12 Supplemental Photos Photograph: 17 Photo Date: 6/30/2011 Location: Supplemental Photo Direction: North Comment: Vehicle pull-out area north of the site. Native plant cover is close to 100 percent. No further revegetation or monitoring needed at this location. Photograph: 18 Photo Date: 6/30/2011 Location: Supplemental Photo Direction: South Comment: Vehicle pull-out area south of the site. Native plant cover is approximately 30 percent. Recommend reseeding this area during fall 2011. Revegetated Vehicle Pull-out Area north of the restoration site. Attachment 3, Page 10 of 12 Photograph: 19 Photo Date: 6/30/2011 Location: Supplemental Photo Direction: NA Comment: Wetland plants are growing well and spreading independently from original plantings. Photograph: 20 Photo Date: 6/30/2011 Location: Supplemental Photo Direction: NA Comment: Mulefat cuttings are surviving. Recommend planting more cuttings on the north side of the wetland. Attachment 3, Page 11 of 12 Photograph: 21 Photo Date: 6/30/2011 Location: Supplemental Photo Direction: NA Comment: Pliable edging installed on north side of site (upland) to keep iceplant from spreading into the site. Photograph: 22 Photo Date: 6/30/2011 Location: Supplemental Photo Direction: NA Comment: Approximately 65 percent native cover on the north side of the site (upland). Revegetation efforts are successful during Year 1. Attachment 3, Page 12 of 12 Photograph: 23 Photo Date: 1/8/2009 Location: Supplemental Photo – wetland prior to construction Direction: west Comment: Note that emergent wetland within the project footprint was minimal on the north side (yellow circle) prior to bridge replacement and consisted of the highly invasive giant reed on the south side (left side of photo).