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HomeMy WebLinkAbout3537; North Agua Hedionda Interceptor West Segment; North Agua Hedionda Interceptor West Segment; 2007-05-01May 1,2007 4775-05 Mr. Mark Biskup City of Carlsbad 1635 Faraday Avenue Carlsbad, CA 92008 Subject: Biological Resource Letter Report NAHI Western Segment Realignment Project, Carlsbad, California Dear Mr. Biskup: INTRODUCTION In October 2004, the City of Carlsbad certified a Final Environmental Impact Report (EIR) and approved the North Agua Hedionda Interceptor (NAHI) Western Segment Sewer Maintenance Access Road and Shoreline Protection Project. The purposes of that project was to restore the access road that has deteriorated substantially over the years due to wave, water and wind erosion, and provide shoreline stabilization to avert ftirther undermining and/or erosion, and to allow future routine sewer maintenance cleaning, rehabilitation and emergency repairs of the westem segment of the NAHI. In September 2005, the City submitted a coastal development permit application to the California Coastal Commission (Commission) for the project. As part of the Commission permit application process, concerns were raised regarding construction of the shoreline protection wall as well as impacts to environmentally sensitive habitat areas (ESHA) and wetlands. To address the Commission's concerns, the City has re-designed the project to relocate the existing NAHI located along the northern shoreline of the Aqua Hedionda Lagoon to further inland by utilizing micro- tunneling techniques. The re-designed project, referred to as the "NAHI Westem Segment Realignment Project," would eliminate the need to re-establish the sewer maintenance access road and construct the associated trail, as well as construction of the shoreline protection wall and would also avoid impacts to wetlands and to ESHA. The purposes of this letter are to review the biological resources assessment conducted for the original project and provide an updated assessment of impacts associated with the new realignment project. This letter includes discussions of methodology, results (i.e., existing biological conditions), impacts analysis, determination of significant impacts and recommended mitigation measures. This letter report, along with the original Biological Resources Technical Report (Dudek 2004) provides Mr. Mark Biskup Re: B^lo^cal Resources Letter p^ejm^r^AHI Westem Segment Realignment Project 'y- sufficient information to evaluate project impacts to biological resources pursuant to the California Environmental Quality Act (CEQA), state and federal wetlands and endangered species regulations, and the City of Carlsbad Habitat Management Plan (HMP). METHODS Sensitive biological resources present or potentially present onsite were identified through a literature search using the following sources: U.S. Fish and Wildlife Service (2006), California Natural Diversity Database (CDFG 2006 a, b, c), the California Native Plant Society (CNPS) Inventory or Rare and Endangered Vascular Plants (CNPS 2006), and the vegetation and sensitive species mapping performed for the Multiple Habitat Conservation Program (SANDAG 2001). General information regarding wildlife species present in the region was obtained form Unitt (1984), Ehrlich (1988), and Garrett and Dunn (1981) for Birds; Bond (1977) fOTHiammals; Stebbins (1985) for reptiles and amphibians; and Emmel and Emmel (1973) for butterflies. Dudek biologist Jeimifer Tximbull conducted a biological reconnaissance survey and general wildlife survey of the project study area on January 15, 2007. The survey took place fi^om 1:15 to 3:45 pm with weather consisting of clear skies, 60 to 65 degree temperatures, and winds that ranged fi"om three to 12 miles per hour. During this survey the entire project area was walked and vegetation communities within the project study area that were previously mapped by Dudek in 2001 were visually confirmed. A more detailed delineation of vegetation community boundaries was conducted within the proposed staging area B using a global positioning system (GPS) backpack unit with sub- meter accuracy. All wildlife observed within the study area was recorded (Appendix B). Following completion of the field work, the vegetation boimdaries were transferred to a topographic base and digitized into an AutoCAD drawing. Using ArcCAD, a GIS coverage was created, and the acreages of each vegetation type were determined. All vegetation communities were mapped according to Holland (1986) with modifications to accommodate the lack of conformity of the observed communities to those of Holland. Wildlife species detected during the field survey by sight, vocalizations, burrows, and other sign were recorded. Binoculars were used to aid in the identification of observed wildlife. Latin and common names of animals referred to in this report follow Stebbins (1985) for reptiles and amphibians, American Ornithologists' Union (1983,1989,2000) for birds, and Jones et al. (1997) for mammals. A cumulative list of wildlife species observed on the project site during all surveys is presented in Appendix B. DUDEK 4775^5 2 May 2007 Mr. Mark Biskup Re: Biological Resources Letter Report, NAJ^I Western Segment Realignment Project RESULTS Project Location The proposed project is located along the north shore of Agua Hedionda Lagoon fijom Hoover Street in the west to Cove Drive in the east (Figures 1 & 2). Land use within the study area has not changed substantially since the 2004 report. Other physical characters such as hydrology, soils, topography are also unchanged and exist as described in the 2004 report. Vegetation Communities and Land Covers Based on species composition and general physiognomy, eight native vegetation commimities or habitat types were identified onsite: open water, intertidal mudflat, intertidal rocky shore, southern coastal salt marsh, disturbed southern coastal salt marsh, disturbed southern willow scrub, coastal sage scrub, and disturbed coastal sage scrub (Figures 3A-3E). In addition, five altered or non-native vegetation communities or land covers are present: aimual (non-native) grassland, eucalyptus woodland, disturbed land, ornamental, and developed land. The acreage of each vegetation conununity and land cover type within the project study area, based on the 2007 survey, is presented in Table L In general, vegetation communities and land cover types exist in the same location and with the same composition of species as documented in Dudek's previous Biological Resources Technical Report (Dudek 2004). Changes observed during the January2007 site visit include the expansion of coastal salt marsh near Hoover Drive, boundary adjustments of coastal sage scrub in and around proposed staging area B, and conversion of land around the proposed eastern tunnel pit location. Within the vicinity of staging area B, vegetation was mapped at a high level of detail. Three types of communities were identified in the area: coastal sage scrub containing native shrub cover of 50% or greater, disturbed coastal sage scrub supporting native shrub cover of 20 to 50%, and disturbed habitat supporting native shrub cover less than 20%. A minimum mapping unit of 0.1 acrewasused in the area in order to document any potential ESHA, The same mapping thresholds were used in the assessment of highly disturbed land near the proposed eastern tuimel pit location. Although native shrubs are present within that area, shrub cover is less than 20% in any given 0.1-acre area and therefore the area is mapped as disturbed habitat. •m m DUDEK 4775-05 3 May 2007 Mr. Mark Biskup Re: Bioi&gtcal Resources Letter Report, NAHI Westem Segment Realignment PrpJ ect' TABLE 1 EXISTING VEGETATION COMMUNITY & LAND COVER TYPES Annual Grassland 0.08 Coastal Salt Marsh 0.60 Disturtied Coastal Salt Marsh 0.06 Coastal Sage Scrub 4.12 Disturt)ed Coastal Sage Scrub 0.63 Developed Land 8.87 Developed Land - Jurisdictional 0.05 Disturbed Land 5.11 Eucalyptus Woodland 0.38 Intertidal Mudflat 3.22 Intertidal Rocky Beach 0.25 Ornamental Plantings 0.77 Open Water 0.91 Disturbed Southern Wiliov/ Scrub 0.11 Jurisdictional Waters In addition to the regulated wetland habitat types described above, two unvegetated ephemeral stream channels occur in the project study corridor. These areas are defined by a bed and bank support an ordinary high water level between one and three feet ^vide, but do not support wetland vegetation. Rather, they support vegetation consistent with surrounding uplands. As stream channels, these areas are considered non-wetland waters regulated by sections 401 and 404 of the Clean Water Act and Sectionl600oftheFish and GameCode and are therefore considered sensiti^^ resources. The alignment of the eastern drainage was modified as a result of the 2007 survey. This drainage appears to have been realigned during construction of the private residence on that parcel. Zoology-Wildlife Diversity Cumulative survey visits to the project site resulted in the observation of 48 bird species 1 reptile species, 5 mammal species, and 20 invertebrates, including 8 butterfly species and 12 'intertidal DUDEK 4775-05 May 2007 Mr. Mark Biskup Re: BiSlo'^ical Resources Letter Report, NAHI Westem Segment Realignment Project species. Overall composition of wildlife species within the study area has not changed based on conditions observed during the 2007 survey, A list of wildlife species observed within the project area is presented in Appendix B. Sensitive Plant Species One sensitive plant species was confirmed within the project study area: southwestern spiny rush (Juncus acutus spp. leopoldii). As was previously detennined, the site does not support habitat for other sensitive plant species. A cumulative list of plant species observed within the project area is presented m Appendix A. Sensitive Wildlife Species One federally-listed threatened wildlife species was confirmed to occupy habitat with the project study area: two pairs of California gnatcatcher (Polioptila califomicd) . One non-listed wildlife species considered locally sensitive, the salt marsh skipper (Panoquina errans) was previously observed within the project study area and is considered to still be present based on unchanged habitat conditions. Focused surveys resulted in observation of 16 individuals in seven locations throughout the project alignment. The salt marsh skipper is a HMP covered species. The general Agua Hedionda Lagoon environment supports habitat for other sensitive wildlife species including: silvery legless lizard (Anniella pulchra pulchra), coastal westem whiptail {Cnemidophorus tigris multiscutatusX orange-throated whiptail (Cnemidophorus hyperythrus beldingi), San Diego horned- lizard (Phrynosoma coronatum blainvillei). Southern California rufous-crowned sparrow (Aimophila ruficeps canescens), westem snowy plover (Charadrius alexandrinus nivosus), California homed lark {Eremophila alpestris actia), loggerhead shrike (Lanius ludovicianus), large-billed savannah sparrow (Passerculus sandwichensis rostratus), Belding's savannah sparrow (Passerculus sandwichensis beldingi), white-faced ibis (Plegadis chihi), westem burrowing owl (Speotyto cunicularia hypugaea), elegant tem (Sterna elegans), California least tem (Sterna antillarum browni), Dulzura California pocket mouse, (Chaetodipus califomicusfemoralis), San Diego black- tailed jackrabbit (Lepus califomicus bennettii), San Diego desert woodrat (Neotoma lepida intermedia), and American badger (Taxidea taxus). Wildlife Corridors and Habitat Linkages Due to its location and surrounding residential development, the habitat present within the project site is not connected to any substantial natural terrestrial habitat. Several small patches of coastal sage scrub occur northeast of the site but are separated by development. These areas likely fimction more as a buffer for waterbirds using the lagoon or intertidal area than as a movement corridor for DUDEK 4775^5 5 May 2007 Mr. Mark Biskup Re: Biological Resources Letter R^ort, NAHI Western Segment Realignment Project upland species. The intertidal area also is not likely to fimction as a movement corridor as it is bounded on both the east and west ends by marinas. Regional Resource Planning Context The lagoon lies within Local Facilities Management Plan Zone 1 as addressed in the City's Growth Management Program. The planning standards for this zone include no net loss of wetlands, preservation of coastal sage scrub, and management of natural habitats adjacent to the lagoon as wetlands buffers. Unavoidable impacts should be mitigated by creation or enhancement of like habitats adjacent to the lagoon or within biological core and linkage areas. Agua Hedionda Lagoon and surrounding properties are also regulated by the City's Aqua Hedionda Land Use Plan and Local Coastal Program (LCP) (1982). The LCP identifies the lagoon as supporting water quality, viewshed, public use, and biological values that require protection. The proposed project is located within the City of Carlsbad, which has a Habitat Management Plan (HMP) approved in 2004, to guide biological resowce planning, protection and development within the City in conformance with the NCCP. Based on proposed development and biological resources, hard and soft line Focus Planning Areas (FPA) are designated in the HMP. Hard line areas generally require 100% conservation and soft line areas generally require specific conservation standards to be implemented during development review. The proposed project lies mostly vdthin the hardline FPA (Figure 4). The project study corridor contains several habitat types considered sensitive by the HMP: intertidal mudflats, intertidal rocky beach, open water, disturbed southern willow scrub, southern coastal salt marsh and coastal sage scrub. Sensitive species found within the study area which are covered under the HMP include California gnatcatcher and salt marsh skipper. As a public infi-astructure project within the proposed FPA, the HMP allows for impacts to covered habitats and species but also requires mitigation. IMPACTS ANALYSIS The project involves realigning the existing westem segment of the NAHI with a new forcemain pipeline. The carrier pipeline would be constructed of thick wall High Density Polyethylene (HDPE) with heat fiised (welded) joints, or bell and spigot PVC, dependent on constraction methods selected by the Contractor. Total pipeline length would be approximately 2,257 linear feet. The Proposed gravity pipeline will be installed using both conventional trenching methods and micro-tunneling construction methods (Figure 5). The various components of the project include: staging, trenching, microtunnelling, and establishment of a section of non-improved new access road. Once construction has been completed, DUDEK 4775^05 6 May 2007 •m m m Mr. Mark Biskup Re: Biological Resources Letter Report, NAHI Westem Segment Realignment Project the existing westem segment of the NAHI will be abandoned in place. All aspects of the project are incorporated into the Construction Footprint and considered a direct impact with the exception of areas that are microtunnel only and non-improved access used for construction (Figures 6A-E). The microtunnel only areas will have no ground disturbance during construction and the presence of the undergrotmd pipe below the surface will not affect the viability , of vegetation or habitat conditions and therefore no impacts would occur. Construction access would utilize the existing compacted sandy base. Given that no material is being deposited, no structures are being built, and future traffic will be uncommon, this aspect of the project would not alter current environmental conditions in that area. Proposed staging area B is depicted in Figure 6D as it is described in the temporary construction easement for the project. However, construction plans and Mitigation Monitoring and Reporting Plan (MMRP) for the project will note that additional resource avoidance is necessary in this area due to the presence of coastal sage scmb. All direct impacts to coastal sage scrub (including disturbed forms) within staging area B will be avoided during construction through the placement of temporary fencing and monitoring by a qualified biologist. The project design feature will ensure that the project results in no impacts to ESHA. Direct Impacts Implementation of the proposed project would result in impacts to vegetation communities and land cover types listed in Table 2. No direct impacts to jurisdictional waters would occur as a result of the project. Regarding sensitive plant and wildlife species, the project avoids impacts to all known sensitive plant and wildlife species locations as well as suitable habitat areas. Therefore, no direct impacts to sensitive plant or wildlife species would occur. Indirect Impacts Indirect impacts to vegetation conrtmunities and waters from the proposed project primarily would result from adverse construction-related "edge effects" that may include dust, soil erosion, pollution, siltation, and runoff. Most of the indirect impacts to vegetation communities and waters can also affect sensitive wildlife, in addition, short-term noise during construction has the potential to affect wildlife activity including bird breeding behavior. DUDEK 477W)5 7 May 2007 Mr. Mark Biskup Re: Biological Resources Letter Report, NAHI Westem Segment Realignment Project TABLE 2 IMPACTS TO VEGETATION COMMUNITIES & LAND COVER TYPES Annua! Grassland 0.00 Coastal Salt Marsh 0.00 DistuFt)ed Coastal Salt Marsh 0.00 Coastal Sage Scrub 0.00 Disturt}ed Coastal Sage Scrub 0.00 Developed Land 0.22 Developed Land ~ Jurisdictional 0.00 Disturbed Land 1.26 Eucal^tus Woodland 0.00 Intertidal Mudflat 0.00 Intertidal Rocky Beach 0.00 Ornamental Plantings 0.01 Open Water 0.00 Disturbed Southern Willovi/ Scrub 0.00 SIGNIFICANCE/MITIGATION Direct impacts to disturbed land, developed land, and ornamental plantings are not considered significant due to the lack of native species utilizing these land cover types. The indirect short-term impacts of dust, soil erosion, pollution, siltation, runoff, and noise from construction activities are significant to vegetation communities, jurisdictional waters, and sensitive wildlife. These impacts may be mitigated by the implementation of a Best Management Practices (BMP) plan approved by the City that may include tiie use of silt fencing, straw bales, gravel bags, and stabilized construction entrances prior to construction. Noise related impacts to sensitive breeding birds including the California gnatcatcher may be mitigated by avoiding construction activities during the breeding season or by the maintenance of noise levels below 60 dBA Leq at occupied nest locations of sensitive species. The maintenance of appropriate noise levels would be confirmed through nesting bird surveys to determine the presence of sensitive nesting birds within 500 feet of the project construction and noise measurements at nest locations during peak construction activity by a qualified acoustician. DUDEK 4775-05 May 2007 Mr. Mark Biskup Re: Biological Resources Letter Report, NAHI Westem Segment Realignment Project HMP COMPLIANCE The proposed project is compliant with the HMP as it would avoid direct impacts to covered species and habitat. With the implementation mitigation measures for indirect impacts, no resources covered by the HMP would be affected by implementation of the project. If you have any questions or comments, please do not hesitate to contact me at (760) 479-4284. Very truly yours, ^^pul Jos Biologist An. Figures 1 — 6 cc: Pam Drew, City of Carlsbad John Porieous, Dudek Russ Berhoh, Dudek LITERATURE CITED Bond, S.I. 1977. Annotated List of the Mammals of San Diego County, California. Trans. San Diego Soc. Nat. Hist. 18:229-248. California Department of Fish and Game, Nauiral Diversity Data Base (CDFG). 2006a. Rarefind. Version 3.0.5. Computer database. March 3,2006. m California Department of Fish and Game, Natural Diversity Data Base (CDFG). 2006b. Special Animals. Biannual publication, mimeo. February 2006. 55 pp. California Department ofFish and Game, Natural Diversity Data Base (CDFG). 2006c. Special Vascular Plants, Bryophytes, and Lichens List. Biannual pubHcation, mimeo. May2006. 96 pp. California Native Plant Society (CNPS). 2006. Inventory of Rare and Endangered Plants (online edition, v7-06b 4-18-06). California Native Plant Society. Sacramento, CA. DUDEK 4775^5 9 May 2007 Mr. Mark Biskup Re: Biological ResourcesLeifer Report, NAHI Westem Segment Realignment Prdject Carlsbad, City of2005. Habitat Management Plan (HMP). Carlsbad, CA. Dudek 2004. Biological Resources Technical Report for tiie NAHI Westem Segment Maintenance Access Road, and Shoreline Stabilization Project. Endnitas, CA. Ehrlich, P.R. 1988. The Birder's Handbook: a Field Guide to tiie Natural History of North American Birds. Simon and Schuster, Fireside, New York, New York. Emmel, T.C. and J.F. EmmeL 1973. The Butterflies of Southem California. Natural History Museum of Los Angeles County, Science Series 26:1-148. Garrett, K. and J. Dunn. 1981. Birds of Southem California: Status and Distribution. Los Angeles Audubon Societ>% Los Angeles, California. SANDAG (San Diego Association of Governments). 2001 Multiple Habitat Conservation Program CD-ROM Stebbins, R.C. 1985. A Field Guide to Westem Reptiles and Amphibians. Houghton Mifflin Co., Boston, Mass. United States Fish and Wildlife Service (USFWS). 2006. Endangered and Threatened Wildlife and Plants; Review of Native Species that are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Recycled Petitions; Annual Description of Progress on Listing Actions. Federal Register 71(176): 53756 - 53835. Unitt, P.A. 1984. Birds ofSan Diego County. Memoir 13, San Diego Society of Natural History. DUDEK 4775-05 "•^ May 2007 Orange County Mexico r = 8Miles Tijuana m m North Agua Hedionda Sewer Western Segment Realignment Project Biological Resources Letter Report Regional Map FIGURE m i\ > Legend Proposed Realignment *H • ^— Existing NAHI Western Segment XsOURCE: USGS 7.5 Minute^eries, San Luis Rey Quadrangle 500 Feet North Agua Hedionda Sewer Western Segment Realignment Project Biological Resources Letter Report Vicinity Map FIGURE i ft i » i « ft « 1 I i i il i< fti t« fci K « « North Agua Hedionda Sewer Western Segment Realignment Project - Biological Resources Letter Report BEST OR!Q!NAL^'°'°^'^^' & Jurisdictional Delineation Index Map l« k« fta ii ii i I I i I i i t <b a k VEGETATION TYPES/LANDCOVERS: Annual Grassland AGL DH CSM CSS DEV Coastal Salt Marsh Coastal Sage Scrub Developed Land EUC IM IRB Disturbed Habitat Eucalyptus Woodland Intertidal Mudflat Intertidal Rocky Beach NOTE: A lower case'd' in front of a vegetatton type designator indicates that it is disturbed. An upper case 'J' following a vegetation type designator indicates that it is Jurisdictional. . r A: Waters of the U. S. (Plumber Indicates width of unvegetated channel.) O Data Station SENSITIVE ANIMAL SPECIES: CAGHOl California gnatcatcher (Dudek, 2001) CAGN07 California gnatcatcher (Dudek, 2007) SMS Salt marsh skipper (Dudek, 2003) BASE PHOTO SOURCE: CITY OF CARLSBAD SEWER SYSTEM SOURCE: CITY OF CARLSBAD GIS DEPT. (AOJUSTED TO TOPOGRAPHIC FEATURES) ORN ow Ornamental Open Water SWS Southem Willow Scrub Study Area Existing Sewer System CAGN General Area of Calling/Movement (2001^ SENSITIVE PLANT SPECIES: Ac Adolphia caUfomica Ja Juncus acutus ssp, leopoldii NOTE: Number Indicates Indlvtdual plant counts at that location. North Agua Hedionda Sewer Western Segment Realignment Project • Biological Resources Letter Report Biological Resources & Jurisdictional Delineation Map FIGURE 3B ii ij |j II lia ill ki It 12 U i tt i fei ft« tta Ki North Agua Hedionda Sewer Western Segment Realignment Project - Biological Resources Letter Report Biological Resources & Jurisdictional Delineation Map FIGURE 3C I HA ftl ii kill fci fci ki h i k 4 k ti k » k I SEE FIGURE 3B FOR BIOLOGICAL I RESOURCES LEGEND ow-SMS2 SCALE IN FEET North Agua Hedionda Sewer Western Segment Realignment Project • Biological Resources Letter Report Biological Resources & Jurisdictional Delineation Map FIGURE 3D ^1 ii Ii Ii ii ftl fti fci fc« fti fei ftl ii I SEE FIGURE 3B FOR BIOLOGICAL i RESOURCES LEGEND 160 SCALE IN FEET North Agua Hedionda Sewer Western Segment Realignment Project - Biological Resources Letter Report Biological Resources & Jurisdictional Delineation Map Vegetation / Landcover: Agriculture Chaparral Sage Scrub Developed Disturbed Habitat Grassland I Open Water Riparian Scrub / Woodland Wetland Woodland Species Common Species Common Label Name Label Name AC California adolphia LH Loggerhead shrike AG Del Mar manzanita LR Light-footed clapper rail Al San Diego thorn-mint LT California least tern BC Long-billed curlew MD Southern mule deer BF Thread-leaved brodiaea MS Saltmarsh skipper BJ S.D. black-tailed jackrabbit NE Black-crowned night heron BK Black-shouldered kite NH Northern harrier BS Belding's Savannah sparrow OS Osprey BW Burrowing owl OW Orange-throated whiptail CG California gnatcatcher QD Nuttall's scrub oak CH Cooper's hawk RP CA rufous-crowned sparrow CL Del Mar Mesa sand aster SC Ashy spike-moss CV Wart-stemmed ceanothus SP San Diego pocket mouse DD Blochman's dudleya ST Nan-ow-leaved nightshade DL Double-crested cormorant BY Summer holly DO Western dichondra TG Two-striped garter snake EU Cliff spurge TV Turkey Vulture GE Golden eagle WF SW willow flycatcher GS Grasshopper sparrow WG Western grebe HL San Diego horned lizard WP Western snowy plover JA Southwestern spiny rush YC Yellow-breasted chat LB Least Bell's vireo YW Yellow warbler SOURCE: City of Carlsbad & SANDAG . e 750 1,500 3,000 Feet North Agua Hedionda Sewer Western Segment Realignment Project - Biological Resources Letter Report Regional Vegetation & Species and Proposed FPA Hard/Soft Lines Map FIGURE 4 AERIAL SOURCE: AIRPHOTO USA, JAN 2006 Legend O Proposed Access Holes • Proposed Access Hole Rehabilitation Relocated NAHI using Conventional Open Trench Relocated NAHI using Microtunneling Proposed Sewer Lateral (Reconnect existing lateral and provide new lateral stub connection using conventional open trench construction) Microtunneling Pit Area Staging Area , Proposed Non-improved Sewer Access Road — Existing Sewer System — Existing Sewer Easement — Existing Property Lines 100 200 iFPPt North Agua Hedionda Sewer Western Segment Realignment Project - Biological Resources Letter Report Project Components FIGURE SEE FIGURE 6B FOR BIOLOGICAL RESOURCES LEGEND North Agua Hedionda Sewer Western Segment Realignment Project • Biological Resources Letter Report Biological Resources & Jurisdictional Delination Map with Construction Footprint & Non-Improved Access Road Impacts FIGURE 6A VEGETATION TYPES/LANDCOVERS: Annual Grassland AGL DH CSM CSS DEV Coastal Salt Marsh Coastal Sage Scrub Developed Land EUC IM IRB Disturbed Habitat Eucalyptus Woodland Intertidal MudHat Intertidal Rocky Beach NOTE: A lower case'd' in front of a vegetation type designator indicates that it is disturbed. An upper case 'J' following a vegetation type designator indicates that it is Jurisdictional. Waters of the U. S. (Number Indicates width of unvegetated channel) O Data Station Relocated Conventional Open Trench Relocated Microtunneling Microtunneling Pit Area Staging Area SENSITIVE ANIMAL SPECIES: CAGNOI California gnatcatcher (Dudek, 2001) CAGH07 California gnatcatcher (Dudek, 2007) SMS Sa/£ marsh skipper (Dudek, 2003) BASE PHOTO SOURCE: CITY OF CARLSBAD SEWER SYSTEM SOURCE: CITY OF CARLSBAD GIS DEPT. (ADJUSTED TO TOPOGRAPHIC FEATURES) ORN OW SWS Ornamental Open Water Southern Willow Scrub ' Study Area Construction Footprint Impact Proposed Non-Improved Access Road Impact Proposed Sewer Lateral Existing Sewer System CAGN General Area of Calling/Movement (2001) SENSITIVE PLANT SPECIES: Ac Adolphia califomica Ja Juncus acutus ssp. leopoldii NOTE: Number indicates individual plant counts at that location. North Agua Hedionda Sewer Western Segment Realignment Project - Biological Resources Letter Report Biological Resources & Jurisdictional Delination Map with Construction Footprint & Non-Improved Access Road Impacts North Agua Hedionda Sewer Western Segment Realignment Project • Biological Resources Letter Report Biological Resources & Jurisdictional Delination Map with Construction Footprint & Non-Improved Access Road Impacts FIGURE 6C SEE FIGURE SB FOR BIOLOGICAL RESOURCES LEGEND North Agua Hedionda Sewer Western Segment Realignment Project - Biological Resources Letter Report Biological Resources & Jurisdictional Delination Map with Construction Footprint & Non-Improved Access Road Impacts FIGURE 6D I SEE FIGURE 6B FOR BIOLOGICAL I RESOURCES LEGEND 160 SCALE IN FEET North Agua Hedionda Sewer Western Segment Realignment Project • Biological Resources Letter Report Biological Resources & Jurisdictional Delination Map with Construction Footprint & Non-Improved Access Road Impacts FIGURE 6E APPENDIX A CUMULATIVE UST OF PLANT SPECIES OBSERVED ONSITE VASCULAR PLANT SPECIES ANGIOSPERMAE (DICOTYLEDONES) ACANTHACEAE - ACANTHUS FAMILY * Thunbergia alata - black-eyed susan vine AIZOACEAE - CARPET-WEED FAMILY * Aptenia cordifolia - aptenia * Carpobrotus edulis - Hottentot-fig * Mesembryanthemum crystallinum - crystal ice plant * Mesembryanthemum nodijlorum - sea-fig AMARANTHACEAE - AMARANTH FAMILY Amaranthus blitoides - prostrate amaranth ANACARDIACEAE - SUMAC FAMILY Malosma laurina - laurel sumac Rhus integrifolia - lemonadebeny Rhus ovata - sugar bush Toxicodendron diversilobum - poison-oak APIACEAE - CARROT FAMILY * Foeniculum vulgare - sweet fennel APOCYNACEAE - DOGBANE FAMILY * Nerium oleander - oleander ASTERACEAE - SUNFLOWER FAMILY Ambrosia confertifolia - weak-leaved burweed Ambrosia psilostachya var. califomica - western ragweed Artemisia califomica - coastal sagebrush Artemisia douglasiana - California mugwort Baccharis pilularis - coyote brush Baccharis salicifolia - mule fat Baccharis sarothroides - broom baccharis * Conyza canadensis - horseweed * Chrysanthemum coronarium - garland chrysanthemum L^w Wi-ix ^ ^ May 2007 APPENDIX A CARYOPHYLLACEAE - PINK FAMILY * Spergularia bocconii - sand-spurrey CHENOPODIACEAE - GOOSEFOOT FAMILY Atriplex lentiformis- big saltbush, quail brush ** Atriplexpacifica - south coast saltbush ^ Atriplexpatula - spear oracle ^ * Atriplex semibaccata - Australian saltbush Atriplex triangularis - spearscale * * Bassia hyssopifolia - five-hooked bassia * * Chenopodium ambrosioides - Mexican tea * Chenopodium murale - nettle-leaved goosefoot Salicomia subterminalis - Parish's pickleweed Salicomia virginica - common pickleweed * Salsola tragus - Russian-thistle <m Suaeda califomica - California sea-blite CONVOLVULACEAE - MORNING-GLORY FAMILY Calystegia macrostegia - westem bindweed - Cressa truxillensis - alkali weed m CRASSULACEAE - STONECROF FAMILY Crassula argentea - jade plant * Dudleya pulverulenta - chalk dudleya CUSCUTACEAE - DODDER FAMILY Cuscuta salina - salt marsh dodder urn * EUPHORBIACEAE - SPURGE FAMILY ^ Chamaesyce sp. - spurge * Ricinus communis - castor-bean FABACEAE - PEA FAMILY « Lotus scoparius - deerweed * Medicago polymorpha - California biirclover DUDEK 477S05 A-3 May 2007 m APPENDIX A g^MULATIVmy^llE^ PLANT SPEglES QBSB?VED ONSITE SI POLYGONACEAE - BUCKWHEAT FAMILY Eriogonumfasciculatum - California buckwheat * Rumex crispus - curly dock PRIMULACEAE - PRIMROSE FAMILY * Anagallis arvensis - scarlet pimpernel RUBIACEAE - MADDER FAMILY Galium angustifolium - narrow-leaved bedstraw - SALICACEAE - WILLOW FAJVHLY ^ Populusfremontii - Fremont's cottonwood ^ Salix exigua - narrow-leaved willow Salix gooddingii var. gooddingii - black willow " Salix lasiolepis var. bracelinae - arroyo willow m SAURURACEAE - LIZARD'S-TAIL FAMILY Anemopsis califomica - yerba mansa SOLANACEAE - NIGHTSHADE FAMILY « * Datura wrightii - westem jimsonweed Lycium califomicum - California box-thom Nicotiana glauca - tree tobacco TAMARICACEAE - TAMARISK FAMILY ^ * Tamarix sp. - tamarisk URTICACEAE - NETTLE FAMILY • Urtica dioica - giant creek nettle ^ ZYGOPHYLLACEAE - CALTROP FAMILY * Tribulus terrestris - puncture vine * ANGIOSPERMAE (MONOCOTYLEDONES) ARECACEAE - PALM FAMILY m Washingtonia robusta - fan palm DUDEK A-5 May 2007 T ^ ' APPENDIX A ^^' mvm^mE us^mmfims^ms OBSERVED ONSITE ZOSTERACEAE - EEL-GRASS FAMILY Zostera marina - eel-grass signifies introduced (non-native) species 4775-05 May 2007 m m m A^pr^^r V APPENDIX B j4CUMliM^e/gy^l^ SPECIES 0^§€RVED ONSITE WILDLIFE SPECIES -INVERTEBRATES CLASS CRUSTACEA - BARNACLES, BEACH HOPPERS, SHRIMPS, LOBSTERS, CRABS, ETC. Balanus glandula - barnacle Hemigrapsus oregonensis - mud-flat crab CLASS GASTROPODA - SNAILS, LIMPETS, SEA HARES, NUDIBRANCHS, ETC. Collisella digitalis - fingered limpet CoUisella scabra - rough limpet Littorina sp. (probably L. scutulata)- periwinkle species Lottia gigantea - giant owl limpet Tegula funebralis - black tegula CLASS BIVALVLV - CLAMS, COCKLES, MUSSELS, OYSTERS, SHIPWORMS, ETC. Mytilus edulis - blue mussel Ostrea lurida - Pacific oyster Tagelus subteres - razor clam Argopecten aequisulcatus - speckled scallop Tresus nuttalli - gaper clam BUTTERFLIES AND MOTHS HESPERHDAE - SKIPPERS Hylephila phyleus - fiery skipper Panoquina errans - salt marsh skipper PIERIDAE - WHITES AND SULFURS Pieris rapae - cabbage butterfly LYCAENIDAE - BLUES, HAIRSTREAKS, & COPPERS Brephidium exile - pygmy blue Leptotes marina - marine blue Blue species DUDEK B-1 May 2007 FNL APPENDIX B '£aJSTX)F WILDLIFESPECIES OSBERVED ONSITE « Actitis macularia - spotted sandpiper ^ Calidris mauri - westem sandpiper ^ Catoptrophorus semipalmatus - willet Limosa fedoa - marbled godwit * Numenius americanus — long-billed curlew M Numenius phaeopus - whimbrel LARIDAE - GULLS & TERNS Larus occidentalis - westem gull ^ Larus califomicus - California gull m Sterna caspia - Caspian tem Sterna forsteri - Forster's tem * ACCIPITRIDAE - HAWKS V Buteo jamaicensis ~ red-tailed hawk FALCONIDAE - FALCONS Falco sparverius - American kestrel PHASIANIDAE - PHEASANTS & QUAILS Callipepla califomica - California quail COLUMBIDAE - PIGEONS & DOVES Columba livia - rock dove Zenaida macroura - mourning dove TROCHILIDAE - HUMMINGBIRDS Calypte anna - Aima's hununingbird Calypte costae - Costa's hummingbird TYRANNIDAE - TYRANT FLYCATCHERS Sayomis nigricans ~ black phoebe Sayomis soya — Say's phoebe Tyrannus verticalis - westem kingbird Tyrannus vociferans ~ Cassin's kingbird DUDEK 4775-05 B-3 May 2007 r Fi F:>ini> APPENDIX B .ftWiGUMULATiVE LIST£>RWLDLIFE~SPECIES OBSERVED ONSITE MAMMALS LEPORIDAE - HARES & RABBITS Sylvilagus bachmani ~ bmsh rabbit GEOMYIDAE - POCKET GOPHERS Thomomys bottae - Botta's pocket gopher HETEROMYIDAE - POCKET MICE & KANGAROO RATS Chaetodipus califomicus - California pocket mouse CANIDAE - WOLVES & FOXES * Cams familiaris - domestic dog MUSTELIDAE - WEASELS, SKUNKS, & OTTERS Mephitis mephitis - striped skunk signifies introduced (non-native) species DUDEK 4775-05 B-5 May 2007