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Home My WebLink About6607; CMP Replacement Hoover/Lagoon & Highland/Adams; CMP Replacement Hoover/Lagoon & Highland/Adams; 2012-04-01Biological Resources Report for the Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams ty of Carlsbad Utilities Engineering Division 1635 Faraday Avenue Carlsbad, CA 92008 Contact: Sherri Howard, Associate Engineer PREPARED BY: 605 Third Street Encinitas, CA 92024 DRAFT Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Prepared for: City of Carlsbad - Utilities Engineering Division 1635 Faraday Avenue Carlsbad, California 92008 Contact: Sherri Howard, Associate Engineer Prepared by: DUDEK 605 Third Street Encinitas, California 92024 Contact: Vipul joshi APRIL 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams TABLE OF CONTENTS Section Paqe No. 1.0 INTRODUCTION 1 2.0 REGULATORY SETTING ...1 2.1 North County Multiple Habitat Conservation Plan 1 2.2 Agua Hedionda Land Use Plan and Local Coastal Program 2 2.3 California Coastal Commission 2 3.0 PROJECT SETTING 2 3.1 Project Location 2 3.2 Topography and Soils 3 3.3 On-site and Surrounding Land Uses 3 4.0 PROJECT DESCRIPTION 3 5.0 METHODS 4 5.1 Literature Review 4 5.2 Field Reconnaissance 4 5.2.1 Vegetation Community and Land Cover Mapping 19 5.2.2 Flora '. 19 5.2.3 Fauna....: 19 5.2.3 Jurisdictional Delineation 19 5.2.5 Survey Limitations 21 6.0 RESULTS 22 6.1 Vegetation Communities, Land Covers, and Floral Diversity 22 6.1.1 Open Water-64100 23 6.1.2 Beach-64400 23 6.1.3 Coastal Brackish Marsh - 52200 23 6.1.4 Coastal Sage Scrub (including disturbed) - 32500 23 6.1.5 Non-native Grassland - 42200 24 6.1.6 Disturbed Habitat - 11300 25 6.1.7 Developed- 12000 ; 25 6.1.8 Floral Diversity : -. 25 6.2 Wildlife 25 6.3 Special-Status and/or Regulated Resources 27 6.3.1 Special-status Plant Species; 27 6.3.2 Special-status Wildlife Species 27 6.4 Jurisdictional Delineation '. 46 7216 DUDEK i April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams 7.0 IMPACTS.... 46 7.1 Permanent Impacts 47 7.1.1 Hoover/Lagoon 48 7.1.2 Highland/Adams 48 7.2 Temporary Impacts 48 7.2.1 Hoover/Lagoon... : 48 7.2.2 Highland/Adams..... 49 7.3 Determination of Significance 49 7.3.1 Direct Permanent 49 7.3.2 Direct Temporary 50 7.3.3 Indirect Temporary 50 8.0 RECOMMENDED AVOIDANCE AND MINIMIZATION MEASURES 50 8.1 HMP Compliance 50 8.2 Recommended Mitigation Measures 50 9.0 REFERENCES.. 52 APPENDICES A Cumulative List of Plant Species within the Project Area B Cumulative List of Wildlife Species within the Project Area FIGURES 1 Regional Map 5 2 Vicinity Map ....7 3 Regional Planning 9 4a Biological Resources Map - Hoover/Lagoon Project Area 11 4b Biological Resources Map - Highland/Adams Project Area 13 5a Proposed Impacts - Hoover/Lagoon Project Area 15 5b Proposed Impacts - Highland/Adams Project Area 17 TABLES 1 Survey Conditions 4 2 Vegetation Communities and Land Cover Types within the Project Area 22 3 Special-Status Plant Species Observed or Potentially Occurring on the Project Site 29 4 Special-status Wildlife Species Observed or Potentially Occurring in the Project Area .37 5 Results of Jurisdictional Delineation 46 6 Impacts to Vegetation Communities within the Project Area 47 7216 DUDEK ii April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams 1.0 INTRODUCTION This report describes the existing biological conditions within 250 feet of two projects proposed as part of the Corrugated Metal Pipe Replacement Program (proposed project). The proposed project consists of either replacing or repairing sections of pipe at two separate locations: Adams Street/Highland Drive and Hoover Street/Agua Hedionda Lagoon, both located within the City of Carlsbad (City), California (Figures 1 and 2). The purpose of this report is to (1) describe the conditions of biological resources within the project area in terms of vegetation, flora, wetlands, wildlife, and wildlife habitats; (2) quantify potential direct and indirect impacts to biological resources that will resuh from the project; (3) discuss those impacts in terms of biological significance in view of federal, state, and local laws and City policies; and (4) specify measures to mitigate any impacts that would occur to biological resources requiring mitigation in accordance with the City's Biology Guidelines (Technology Associates 2008). 2.0 REGULATORY SETTING 2.1 North County Multiple Habitat Conservation Plan The City is a member of the North County Multiple Habitat Conservation Plan (MHCP; SANDAG 2001) and has adopted a Habitat Management Plan (HMP), which is a subarea plan under the MHCP. The MHCP is a comprehensive, multiple-jurisdictional planning tool designed to create, manage, and monitor an ecosystem preserve in northwestern San Diego County. The HMP is a citywide program with the purpose of preserving the diversity of species and habitats as well as sensitive biological resources while allowing for development that is consistent with City plans. The objectives of the HMP are to develop a plan that conserves the full range of vegetation types with the focus on rare species and habitat, conserves areas capable of supporting covered species in perpetuity, and maintains functional wildlife corridors and habitat linkages. Based on proposed development and biological resources, hard- and soft-line Focus Planning Areas (FPAs) 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. Portions of the Hoover/Lagoon project area are within an existing hardline FPA, while a portion ofthe Highland/Adams project area is located within a proposed standards area (Figure 3). 7216 DUDEK 1 April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams 2.2 Agua Hedionda Land Use Plan and Local Coastal Program Agua Hedionda Lagoon and surrounding properties are also regulated by the City's Agua Hedionda Land Use Plan and Local Coastal Program (LCP) (City of Carlsbad 1982). The LCP identifies the lagoon as supporting water quality, viewshed, public use, and biological values that require protection. According to the Land Use Plan, portions of the open space in which the projects are located are designated as low-to-medium residential and recreation commercial. The portions of the shoreline are designated as open space (Exhibit C, City of Carlsbad 1982). 2.3 California Coastal Commission Both projects are located within the boundaries of the coastal zone within a coastal deferred certification area. Under the California Coastal Act (CCA), the California Coastal Commission (CCC) regulates the "coastal zone" and requires a coastal development permit for almost all development within this zone. The CCA also protects designated sensitive coastal areas by providing additional review and approvals for proposed actions in these areas. The CCA defines wetlands as "lands within the coastal zone which may be covered periodically or permanently with shallow water and include saltwater marshes, swamps, mudflats, and fens" (California Public Resources Code, Section 30121). The CCA allows diking, filling, or dredging of wetlands for certain uses, such as restoration. The CCA also directs each city or county within the coastal zone to prepare an LCP for CCC certification (Califomia Public Resources Code, Section 30500). Certain coastal areas located within a county or city jurisdiction area are known as "areas of deferred certification" (ADCs). Such geographic areas are not considered by the CCC to be part ofthe final, certified LCP, even while surrounded by other areas that are addressed by the LCP. The creation of an ADC results generally from a lack of agreement between the CCC and a county or city regarding the LCP policies or zoning provisions that should apply to a specific geographic area. Certification by the CCC of the remainder of the LCP jurisdiction area may occur, but the site of the disagreement remains "uncertified." 3.0 PROJECT SETTING 3.1 Project Location The proposed projects occur in two separate locations. One project is located along Hoover Street, southwest of Adams Street, and within vacant land adjacent to the Agua Hedionda Lagoon (Hoover/Lagoon), and the other project is located at the intersection of Highland Drive and Adams Street (Highland/Adams) within the City of Carlsbad, San Diego County (Figures 1 and 2). Both project areas are located on the U.S. Geological Survey (USGS) 7.5 minute San Luis Rey quadrangle. Township 12 South, Range 4 West, Section 8. 7216 DUDEK 2 April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams 3.2 Topography and Soils The Hoover/Lagoon project area is located immediately adjacent to Hoover Street, which slopes southwest toward the lagoon. The pipeline extends southwest of Hoover Street, into disturbed habitat, and continues to slope toward that lagoon. Elevations range from approximately 0 to 80 feet above mean sea level (amsl). The Highland/Adams project area is located primarily within roadways, and only a small portion ofthe project is located within native habitat. Topography within the immediate project vicinity is relatively flat. A slope of native vegetation that leads to the lagoon is located just south of this project area. Two soil types are located within the entire project area. Soils within the Hoover/Lagoon project consist of Carlsbad gravelly loamy sand, 9% to 15% slopes. These moderately well-drained soils are derived from ferruginous sandstone. The soils vvithin the Highland/Adams are marina loamy coarse sand, 9% to 30% slopes. These soils are classified as somewhat excessively drained, and the parent material is eolian sand derived from mixed sources. 3.3 On-site and Surrounding Land Uses Both proposed projects are located northeast of the Agua Hedionda lagoon. A patch of vacant land is located between the lagoon and Adams Street (Figures 4a and 4b) that is identified as Hedionda Point in the Agua Hedionda Land Use Plan (City of Carlsbad 1982). Residential development surrounds the vacant land and both project areas to the north, south, and east. Interstate 5 is located west of the lagoon and both project areas. The General Plan Land Use designation is Residential low to medium density and the zoning is R-1-15000 for vacant and adjacent lots. 4.0 PROJECT DESCRIPTION The Hoover/Lagoon project involves rehabilitating approximately 474 lineal feet of 21-inch corrugated metal pipeline (CMP) with a cured-in-place liner. The project also includes replacing approximately 24 lineal feet of 21-inch CMP with 18-inch high-density polyethylene (HDPE) pipe via open trench immediately upstream of the damaged drainage outfall structure. The project is located within the public right-of-way of Hoover Street and vacant land between the southern end of Hoover Street and the northern edge of the Agua Hedionda Lagoon. In addition, the project includes the construction of a 1) storm drain cleanout, 2) headwall, and 3) riprap energy dissipater (Figure 5a). The Highland/Adams portion ofthe proposed project consists of replacing approximately 132 lineal feet of 12- and 15-inch damaged and degraded CMP with an 18-inch reinforced concrete pipe (RCP) within the public right-of-way at the intersection of Highland Drive and Adams 7216 DUDEK 3 April2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams Street. In addition, the project includes construction of 1) two catch basins, 2) two storm drain cleanouts, 3) a concrete drainage swale, 4) a concrete drainage ditch, 5) a concrete spillway, and 6) a riprap energy dissipater (Figure 5 b). Staging for equipment storage, etc., during construction for both projects is assumed to occur within roadways or other disturbed, vacant lots that are devoid of biological resources. 5.0 METHODS Data regarding biological resources present in the project area were obtained through a review of pertinent literature and field reconnaissance; both are described in detail as follows. 5.1 Literature Review Special-status biological resources present or potentially present on site were identified through a literature search using the following sources: Habitat Management Plan for Natural Communities in the City of Carlsbad (City of Carlsbad 1999); U.S. Fish and Wildlife Service (USFWS) (2012); California Department of Fish and Game (CDFG) (2011a-b and 2012a-c); and the California Native Plant Society's (CNPS's) online Inventory of Rare and Endangered Vascular Plants iCN?S 2012). 5.2 Field Reconnaissance Dudek biologists Callie Ford and Patricia Schuyler conducted vegetation mapping, a botanical inventory, a general wildlife survey, and a jurisdictional delineation on January 27, 2012. Survey conditions are included in Table 1. Table 1 Survey Conditions Date-• Staff Survey Duration Temperature , . Skies' • Wind Jan 27,2012 Callie Ford; Patricia Schuyler 1300-1730 79<'F Clear, 0% cloud cover 0 to 2 mph DUDEK 7216 April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams INTENTIONALLY LEFT BLANK 7216 DUDEK 6 April 2012 DUDEK SOURCE: USGS 7,5-Minute Series San Luis Rey Quadrangle. FIGURE 2 Vicinity Map 7216 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams 400 =J Feet DUDEK 7216 SOURCE: Bing 2011, Cityof Carlsbad 2011 FIGURE 3 Regional Planning Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams FIGURE 4a Biological Resources Map - Hoover/Lagoon Project Area Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams DUDEK SOURCE: BING 2011, Harris SAssociates 7216 FIGURE 5b Proposed Impacts - Highland/Adams Project Area Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Higtiland/Adams Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams 5.2.1 Vegetation Community and Land Cover Mapping Plant communities were mapped in the field directly onto a 100-scale (1 inch =100 feet) color digital orthographic map of the property. These boundaries and locations were digitized by Dudek geographic information system (GIS) technician Tyler Friesen using ArcGIS software. Vegetation community classifications used in this report follow Holland (1986), as revised by Oberbauer et al. (2008). 5.2.2 Flora All plant species encountered during the field surveys were identified and recorded. Those species that could not be identified immediately were brought into the laboratory for further investigation. Latin and common names for plant species with a California Rare Plant Rank (CRPR) (formerly CNPS List) follow the CNPS On-Line Inventory of Rare, Threatened, and Endangered Plants of California (2010). For plant species without a CRPR, Latin names follow the Jepson Interchange List of Currently Accepted Names of Native and Naturalized Plants of California (Jepson Flora Project 2010), and common names follow the U.S. Department of Agriculture (USDA) Natural Resources Conservation Service Plants Database (USDA 2010). 5.2.3 Fauna Dudek biologists walked both project areas to identify and record all wildlife species, as detected during field surveys by sight, calls, tracks, scat, or other signs. In addition to species actually observed, expected wildlife usage of the site was determined according to known habitat preferences of regional wildlife species and knowledge of their relative distributions in the area. No trapping or focused surveys for special-status or nocturnal species was conducted. Latin and common names of animals follow Stebbins (2003) for reptiles and amphibians, American Ornithologists' Union (AOU 2012) for birds, Wilson and Reeder (2005) for mammals, and Emmel and Emmel (1973) for butterflies. 5.2.3 Jurisdictional Delineation A jurisdictional delineation was conducted within the project boundary to delineate areas under the jurisdiction of the CDFG, pursuant to Sections 1600-1603 ofthe California Fish and Game Code, under the jurisdiction of the U.S. Army Corps of Engineers (ACOE), pursuant to Section 404 of the federal Clean Water Act (CWA), under jurisdiction of Regional Water Quality Control Board (RWQCB), pursuant to CWA Section 401 and the Porter-Cologne Act, and under the jurisdiction of the CCC under the CCA. The ACOE jurisdictional wetiands delineation was conducted in accordance with the U.S. Army Corps of Engineers Wetland Delineation Manual 7216 DUDEK 19 April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams (ACOE 1987), the Interim Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Arid West Region (ACOE 2008), and Rapanos Guidance (ACOE and EPA 2008); hydrology, vegetation, and soils were examined at potential wetland sites and were recorded on wetiand determination data forms. A predominance of hydrophytic vegetation, where associated with a stream channel, was used to define CDFG-regulated riparian vegetation. The limits of areas under the jurisdiction of the RWQCB generally match those areas delineated as ACOE-jurisdictional. However, stream channels with evidence of an ordinary high water mark (OHWM) that lack connectivity to "waters of the U.S." may be considered to be under the jurisdiction of RWQCB and CDFG but not under the jurisdiction of ACOE. CCC jurisdiction was based on presence of any one of the three wetland criteria. ACOE jurisdiction of tidal wetlands, regardless of the presence/absence of indicators, extends to 18 inches above mean ordinary high tide elevation. Based on tide charts for the Carlsbad area, ordinary mean high tide was determined to be approximately 3 feet amsl, and therefore tidal wetlands jurisdiction extends to the 4.5-foot contour amsl (Anderson 2011). It is presumed that RWQCB and CCC also take jurisdiction over this tidal area. Additional wetiands jurisdiction may occur above the 4.5-foot contour, but would be based on presence of appropriate wetlands indicators. CDFG, under the Lake and Streambed Alteration program, does not regulate impacts to marine wetlands that are supported by tidal influences. The extent of wetiand features was determined in the field by collecting data using a Global Positioning System (GPS) unit; the shapes were then transferred to topographic base, and GIS coverage was created. The results of the study include areas delineated as jurisdictional by the ACOE, RWQCB, and the CCC. Since the project area is solely influenced by tides, none ofthe wetiands on site is under the jurisdiction of the CDFG. Hydrophytic Vegetation Seasonal changes in species composition, human land-use practices, wildfires, and other natural disturbances can adversely affect the wetlands vegetation determination. During the delineation, a data station point was considered positive for hydrophytic vegetation if it passed the basic dominance test (Indicator 1), meaning that more than 50% of the dominant species sampled were characterized as either obligate, facultative wetland, and/or facultative per the National List of Plant Species that Occur in Wetlands:' 1988 National Summary (Reed 1988). In those cases where the dominance test failed, the vegetation parameter was reevaluated using the prevalence index (Indicator 2), which takes into account all plant species in the community, not just dominants. The standard plot sampling technique was used to sample vegetation within a 5-foot radius for herbaceous vegetation and a 10-foot radius for trees, shrubs, and woody vines. All plant species 7216 DUDEK 20 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams observed during the surveys were identified and recorded. Where plant identification could not be made in the field, a sample was taken and later identified in the laboratory. Hydric Soils According to the National Technical Committee for Hydric Soils, hydric soils are "soils that are formed under conditions of saturation, flooding, or ponding long enough during the growing season to develop anaerobic conditions in the upper part" (USDA Soil Conservation Service 1994). Soil pits were prepared using a "sharp shooter" shovel to determine whether hydric soils were present. The presence of hydric soils was determined through consultations with the 1987 Manual as well as Field Indicators of Hydric Soils in the United States v. 7.0 (NRCS 2010) and the Interim Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Arid West Region (ACOE 2008). Munsell Soil Color Charts were used to determine soil chroma and value. Soil pits were prepared to a depth of 12 inches. Dry soils were moistened to obtain the most accurate color. In general, soils from test pits were determined to be hydric if they exhibited redoximorphic features (e.g., redox concentrations, redox depletions, reduced matrix or depleted matrix). Hydrology In accordance with the guidelines prescribed in the Arid West supplement (ACOE 2008), wetland hydrology indicators are separated into four major groups: A, B, C, and D. Group A indicators are based on direct observations of surface flow, ponding, and soil saturation/groundwater. Group B indicators consist of evidence that the project area has been or is currently subjected to ponding—including, but not limited to, water marks, drift deposits, and sediment deposits. Group C indicators include signs of previous and/or current saturation, including oxidized rhizospheres surrounding living roots and the presence of reduced iron or sulfur, both of which are indicative of extended periods of soil saturation. Group D indicators consist of "vegetation and soil features that are indicative of current rather than historic wet conditions and include a shallow aquitard and results of the Facultative (FAC)-Neutral test" (ACOE 2008). Each group is subdivided into primary and secondary categories based on their frequency and reliability to occur in the Arid West region. 5.2.5 Survey Limitations Limitations of the survey include a diurnal bias and the absence of trapping for small mammals, reptiles, and amphibians. The survey was conducted during the daytime to maximize the detection of most animals. Birds represent the largest component of the vertebrate fauna, and because most birds are active in the daytime, diurnal surveys maximize the number of bird observations. Conversely, diurnal surveys usually result in few observations of mammals, many 7216 DUDEK 21 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams of which may only be active at night. In addition, many species of reptiles and amphibians are secretive in their habits and are difficult to observe using standard meandering transects. The survey was conducted during the winter season, which resulted in detection and identification of most perennial plant species that occur in the area. However, spring and summer blooming herbaceous plants would not have been observed. The purpose ofthe field survey was to determine the likelihood of occurrence of any special-status plant or wildlife species based on the presence/absence of suitable habitat and other natural history elements that might predict their occurtcnce. 6.0 RESULTS 6.1 Vegetation Communities, Land Covers, and Floral Diversity Based on species composition and general physiognomy, four native plant communities and three non-native plant communities or land cover types were observed within the project area. The Hoover/Lagoon project area is located within and surrounded by developed lands, coastal sage scrub (including disturbed), non-native grasslands, disturbed habitat, beach, open water, and coastal brackish marsh. The Highland/Adams project area is located within and surrounded by developed lands to the north and east and coastal sage scrub from Adams Street to the lagoon. Of these communities, coastal brackish marsh and coastal sage scrub are the only special-status communities. Acreages for the seven vegetation communities and land cover types are provided in Table 2. Table 2 Vegetation Communities and Land Cover Types within the Project Area Vegetation Commuhity/Lahd Cover Type hoover/Lagoon Highland/Adams • Total Acreage . Open Water 1.92 . — , 1.92 Beach 0.47 — 0.47 Coastal Brackish Marsh 0.06 — • 0.06 Coastal Sage Scrub (Including Disturbed) 0.76 2.92 3.68 Non-native Grassland 1.43 — 1.43 Disturbed Habitat 2.68 — 2.68 Developed 3.66 3.78 7.44 Total* 10.98 6.69 17.68 'Totals may not sum due to rounding. DUDEK 22 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams 6.1.1 Open Water-64100 This habitat type refers to the lagoon area beyond the shore/beach that permanently contains water and does not contain emergent vegetation. A total of 1.92 acres of open water is mapped within the Hoover/Lagoon project area. 6.1.2 Beach-64400 According to Draft Vegetation Communities of San Diego County (Oberbauer et al. 2008), beach is described as sandy and/or cobbly habitat on coastal strands, lagoons, or lakes. Ocean beaches are a shoreline feature of deposited sand formed by waves and tides off the coast. Beaches on lakes may be a result of waves, disturbance, or geological formations. These are mainly unvegetated areas; however, upper portions may be thinly populated with herbaceous species. On site, the transitional zone between the lagoon and vegetation is mapped as beach. This area lacks vegetation and is composed of sandy soils. A total of 0.47 acre of beach is mapped within the Hoover/Lagoon project area. 6.1.3 Coastal Brackish Marsh - 52200 Coastal brackish marsh is dominated by perennial, emergent, herbaceous monocots to 2 meters (6.5 feet) tall, and cover is often complete and dense. This vegetation community is similar to salt and freshwater marshes and contains some plants characteristic of each; however, the water in the lagoon is brackish from both freshwater and ocean inputs. Salinity may vary considerably within this area and may increase at high tide or during seasons of low freshwater runoff or both. A small patch of coastal brackish marsh is located on 0.062 acre within the Hoover/Lagoon project area. Species within this vegetation community include salt grass {Distichlis spicata), Virginia glasswort {Salicornia virginica), California seablite {Suaeda californica), and southwestem spiny rush {Juncus acutus ssp. leopoldii). 6.1.4 Coastal Sage Scrub (inciuding disturbed) - 32500 Coastal sage scrub is composed of a variety of soft, low shrubs, characteristically dominated by drought-deciduous. species such as California sagebrush {Artemisia californica), flat-top buckwheat {Eriogonum fasciculatum), and sages {Salvia spp.), with scattered evergreen shrubs, including lemonadeberry {Rhus integrifolia) and laurel sumac {Malosma laurina). It typically develops on xeric slopes (Oberbauer et al. 2008). 7216 DUDEK 23 Apnl 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Coastal sage scrub and all its variants generally are recognized as sensitive plant communities by local, state, and federal resource agencies. It supports a diversity of sensitive plants and animals, and it is estimated that it has been reduced by 75% to 80% of its historical coverage throughout Southern California. It is the focus of the current State of California Natural Communities Conservation Planning Program (NCCP). Both the Hoover/Lagoon and Highland/Adams project areas support coastal sage scrub vegetation (Figures 4a and 4b). There are two patches of coastal sage scrub located within the Hoover/Lagoon project area (totaling 0.76 acre), and they include both undisturbed and disturbed coastal sage scrub. Undisturbed coastal sage scrub is dominated by Califomia sagebrush and laurel sumac. Regions mapped as disturbed coastal sage scrub contain few shrubs and appear to have been mowed or cleared. Hottentot fig {Carpobrotus edulis) and non-native grasslands from surrounding areas encroach upon the coastal sage scrub found within the Hoover/Lagoon project area. Almost the entire Highland/Adams project area south of Adams Street is mapped as coastal sage scrub; this area totals 2.92 acres. This project area is dominated by California sagebmsh and laurel sumac; thickleaf yerba santa {Eriodictyon crassifolium) is also present throughout much of the project area. 6.1.5 Non-native Grassland - 42200 Non-native grassland contains a dense-to-sparse cover of annual grasses and is often associated with numerous species of showy-flowered, native annual forbs (Oberbauer et al. 2008); the presence of wild oat {Avena spp.), bromes {Bromus spp.), filaree {Erodium spp.), and mustards {Brassica spp.) are common indicators of this community in San Diego County. Non-native grassland may occur where disturbance by maintenance (mowing, scraping, disking, spraying, etc.), grazing, repetitive fire, agriculture, or other mechanical dismption has altered soils and removed native seed sources from areas formerly supporting native vegetation. Non-native grassland typically occurs adjacent to roads or other developed areas where there has been some historic disturbance. Non-native grassland may support sensitive plant and animal species and provide valuable foraging habitat for raptors. On site, non-native grassland occurs on the north and south side of Adams Street within the Hoover/Lagoon project area and totals 1.43 acres. These areas are dominated by non-native species including red brome {Bromus madritensis ssp. rubens), slender oat {Avena barbata), and filaree {Erodium botrys and E. cicutarium). Some native annual forbs including cryptantha {Cryptantha spp.) and miniature suncup {Camissonia micrantha) are also present. 7216 DUDEK 24 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams 6.1.6 Disturbed Habitat-11300 Disturbed habitat is characterized by predominately non-native species introduced and established through human action. These areas have been physically disturbed and are no longer recognizable as a native or naturalized vegetation association, but continue to retain a soil substrate (Oberbauer et al. 2008). The disturbed habitat within the Hoover/Lagoon project area, totaling 2.68 acres, is primarily dominated by Hottentot fig. The disturbed habitat from Hoover Street to the lagoon has been subject to grading in the past and currently contains straw waddles for erosion control. Some native vegetation has begun to establish in the area, including Menzies' goldenbush {Isocoma menziesii) and big saltbush {Atriplex lentiformis); however, these shrubs are scattered and do not provide enough cover to be categorized into a vegetation community. 6.1.7 Developed-12000 Developed areas include areas that have been constructed upon or otherwise physically altered to an extent that native vegetation is no longer supported. Developed land is characterized by permanent or semipermanent structures, pavement or hardscape, and landscaped areas that often require irrigation (Oberbauer et al. 2008). Within both project areas, developed areas include roads, homes, and associated non-native landscaping. A total of 3.66 acres is developed in the Hoover/Lagoon project area and 3.78 acres within the Highland/Adams project area. 6.1.8 Floral Diversity A total of 34 species of vascular plants, 23 native (68%) and 11 non-native (32%), was recorded within the project areas (Appendix A). The recorded flora of the site is limited because surveys were conducted during winter and fall, and vegetation communities within the project area are limited in diversity and extent. 6.2 Wildlife Birds Twelve bird species were observed during the survey visit (Appendix B). The diversity of birds is limited due to the small amount of habitat, relatively low habitat quality, and small size ofthe project area. The coastal sage scrub and non-native grassland on site provide habitat for a variety of birds, including black phoebe {Sayornis nigricans), lesser goldfinch {Spinus psaltria), Bewick's wren {Thryomanes bewickii), Anna's hummingbird {Calypte anna), and yellow- rumped warbler {Dendroica coronata). The federally threatened coastal Califoraia gnatcateher {Polioptila californica californica) is known to occur near the project area and is presumed present within coastal sage scrub found in the project area. The coastal brackish marsh, beach, 7216 DUDEK 25 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams • and open water areas provide habitat for a number of birds, including the CDFG Species of Special Concern (SSC) American white pelican {Pelecanus erythrorhynchos), killdeer {Charadrius vociferus), spotted sandpiper {Actitis macularius), and American coot {Fulica americana). One California brown pelican {Pelecanus occidentalis califomicus), a CDFG fully protected species, was observed foraging in the lagoon during surveys, but was not recorded within the project area. Reptiles and Amphibians No reptile species were observed on site. However, reptiles common in the area and likely to occur on site include side-blotched lizard {Uta stansburiana), western fence lizard {Sceloporus occidentalis), gopher snake {Pituophis melanoleucus), red-diamond rattlesnake {Crotalus ruber), coachwhip {Masticophis flagellum), and common kingsnake {Lampropeltis getulus). No amphibian species were observed during the survey; however, one or more of the following species may occur on site: garden slender salamander {Batrachoseps attenuatus), western toad {Bufo boreas), and Pacific treefrog {Hyla regilla). Diversity of reptiles and amphibians is low in the project areas due to low habitat quality, limited availability of suitable habitat, and the likely negative effects of the adjacent urban development. Mammals Mammal species, or their sign, observed on. site during the survey include brush rabbit {Sylvilagus bachmani) and California ground squirrel {Spermophilus beecheyi). Mammals not observed on site but likely to be present include Botta's pocket gopher {Thomomys bottae), California mouse {Peromyscus califomicus), California pocket mouse (Chaetodipus califomicus), deer mouse {Peromyscus maniculatus), Dulzura Califomia pocket mouse {Chaetodipus califomicus femoralls), cactus mouse {Peromyscus eremicus), woodrat {Neotoma spp.), Virginia opossum {Didelphis virginiana), striped skunk {Mephitis mephitis), and coyote {Canis latrans). Invertebrates No invertebrate species were observed during the survey visit. A number of intertidal species is presumed to occur within the Hoover/Lagoon project area, especially within the beach habitat. Terrestrial invertebrates not observed on site but likely to be present include cabbage butterfly {Pieris rapae), west coast lady {Vanessa annabella), pygmy blue (Brephidium exile), fiery skipper (Hylephila phyleus), salt marsh skipper {Panoquina errans), and buckeye {Junonia coenia). 7216 DUDEK 26 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams 6.3 Special-Status and/or Regulated Resources Special-status biological resources are defined as follows: (1) species that have been given special recognition by federal, state, or local conservation agencies and organizations due to limited, declining, or threatened population sizes; (2) species and habitat types recognized by local and regional resource agencies as sensitive; (3) habitat areas or plant communities that are unique, are of relatively limited distribution, or are of particular value to wildlife; and (4) wildlife corridors and habitat linkages. Regulated biological resources may or may not be considered special status, but they meet jurisdictional determination criteria under any of several local, state, and/or federal laws. Such resources may be species locations, habitat, or topographic features such as drainage courses. The following discussion addresses special-status plant and wildlife species. The nature of the project area is such that special-status habitat areas or plant communities are not of substantial extent within the project area to be of considerable value to wildlife. There are no corridors or linkages within the project area and, as such, do not warrant discussion. 6.3.1 Special-status Plant Species Southwestern spiny rush, a CRPR 4.2 species, was the only special-status plant species that was observed during focused surveys. One individual was mapped within coastal sage scrub in the Hoover/Lagoon project area (Figure 4a). Another individual was mapped south of the project area as well. Other special-status species that occur adjacent to the project study area or have the potential to occur within the project study area, based on the presence of suitable habitat and soils, as well as on occurtence records based on a CNPS (CNPS 2012) and California Natural Diversity Database (CNDDB; CDFG 2012a) search, are listed in Table 3. 6.3.2 Special-status Wildlife Species American white pelican {Pelecanus erythrorhynchos), a CDFG SSC, was recorded within the Hoover/Lagoon project area. One additional special-status bird species, brown pelican {Pelecanus occidentalis califomicus), a CDFG fully protected and HMP covered species, was observed outside the limits ofthe project area, but was presumed to utilize the project area. The brown pelican was observed foraging in the lagoon, and this species likely is found within the Hoover/Lagoon project area. Coastal California gnatcateher, a federally threatened species, is also presumed to utilize the coastal scrub habitat within the project area, and is known from the vicinity ofthe project area. 7216 DUDEK 27 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams The observed and other special-status species that have the potential to occur within the site are listed in Table 4. The species' potential to occur is based on the presence of suitable habitat and distribution, as well as their occurrence based on the CNDDB search (CDFG 2012a). This list includes species listed by the state and federal government as threatened or endangered, those. species proposed for state and/or federal listing or candidates; and those wildlife species generally considered to be rare or declining, state species of concern, state regulated species, other federal status species. 7216 DUDEK 28 April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams Tables Special-Status Plant Species Observed or Potentially Occurring on the Project Site Scientific Name Common Name Status Federal/ State/City CNPS Primary Habitat Associations/Life Form/ Blooming Period/Elevation Range •> Status On Site or Potential to * Occur Abronia viilosa var. aurita chaparral sand-verbena None/None 1B.1 Chaparral, coastal scrub, desert dunes/annual herb/January-September/246 to 5,250 feet Low potenaal to occur. Although there is suitable coastal scrub habitat on site, the pjoject area is located below the elevation range for this species. Acanthominttia ilicifolia San Diego thorn-mint FT/SE/NE1 1B.1 Chaparral, coastal scrub, valley and foothill grassland, vernal pools; clay/annual herb/April- June/30 to 3,150 feet Low potential to occur. There is suitable vegetative habitat but not suitable clay soils. Adolphia californica California adolphia None/ None/None 2.1 Chaparral, coastal scrub, valley and foothill grassland; clay/deciduous shrub/December- May/150 to 2,430 feet Absent. There is suitable vegetative habitat but not suitable clay soils and this species would have been observed during sun/eys. Ambrosia pumila Dwarf burr ambrosia FE/None/ Covered^.NE 1B.1 Chaparral, coastal scrub, valley and foothill grassland, vernal pools; often disturbed, sometimes alkaline/rhizomatous herb/May- October/60 to 1,360 feet Not observed during previous surveys in the area. Low potential to occur. Coastal scrub may provide suitable habitat, but suitable alkaline soils are not present. Arctostaphyios glandulosa ssp. crassifolia Del Mar manzanita FE/None/ Covered^, NE 1B.1 Maritime chaparral; sandy/evergreen shrub/December-June/< 1,200 feet Absent. This species would have been observed if present. Astragalus tenervar. titi Coastal dunes milk-vetch FE/SE/None 1B.1 Coastal bluff scrub, coastal dunes, coastal prairie; mesic, often vernally mesic/annual herb/March-May/< 170 feet Low potential to occur. There are no suitable mesic conditions within the project area. DUDEK 29 7216 April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams Table 3 Special-Status Plant Species Observed or Potentially Occurring on the Project Site Scientific Name Common Name Status Federal/ State/City CNPS s Primary Habitat Associations/Life Form/ Blooming Period/Elevation Range Status On Site or Potential to Occur Atriplex coulteri Coulter's saltbush None/ None/None 1B.2 Coastal bluff scrub, coastal dunes, coastal scrub, valley and foothill grassland; alkaline or clay/perennial herb/March-October/10 to 1,500 feet Low potential to occur. There is suitable vegetative habitat but not suitable soils. Atriplex pacifica South Coast saltscale None/ None/None 1B.2 Coastal bluff scrub, coastal dunes, coastal scrub, playas/annual herb/March-October/< 500 feet Low potential to occur. Coastal scrub may provide suitable habitat. Atriplex serenanavar. davidsonii Davidson's saltscale None/ None/None 1B.2 Coastal bluff scrub, coastal scrub; alkaline/ annual herb/April-October/30 to 650 feet. Low potential to occur. There is suitable vegetative habitat but not suitable soils. Baccharis vanessae Encinitas baccharis, FT/SE/ Covered^, NE 1B.1 . Chaparral, cismontane woodland; sandstone/ deciduous shrub/August-November/200 to 2,400 feet Low potential to occur. There is no suitable habitat on site and the project area is located below the elevation range for this species. Bergerocactus emoryi Golden-spined cereus None/ None/None 2.2 Closed-cone conifer forest, chaparral, coastal scrub; sandy/shrub/May-June/10 to 1,300 feet Absent. This species would have been observed if present. Bloomeria clevelandii San Diego goldenstar None/None/NE 1B.1 Chaparral, coastal scrub, valley and foothill grassland, vernal pools; clay/bulbiferous herb/ April-May/160 to 1,550 feet Low potential to occur. There is suitable vegetative habitat but not suitable clay soils. Brodiaea filifolia Thread-leaved brodiaea FT/SE/Covered, NE 1B.1 Chaparral (openings), cismontane woodland, coastal scrub, playas, valley and foothill grassland, vernal pools; often clay/bulbiferous herb/March-June/400 to 2,800 feet Low potential to occur. There is suitable vegetative habitat but not suitable clay soils. In addition, the project area is located below the elevation range for this species. DUDEK 30 7216 April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams Tables Special-Status Plant Species Observed or Potentially Occurring on the Project Site Scientific Name Common Name Status Federal/ State/City CNPS • Primary Habitat Associations/Life Form/ Blooming Period/Elevation Range,: Status On Site or Potential to Occur " ' Brodiaea orcuttii Orcutt's brodiaea None/None/NE 1B.1 Closed-cone conifer forest, chaparral, cismontane woodland, meadows and seeps, valley and foothill grassland, vernal pools; mesic, clay, sometimes serpentine/iiulbiferous herb/May-July/100-5,550 feet Low potential to occur. There are no suitable vegetative habitat or clay soils. Camissonia lewisii Lewis's evening primrose None/None/None 3 Coastal bluff scrub, cismontane woodland, coastal dunes, coastal scrub, valley and foothill grassland; sandy or clay/annual herb/March- May (June)/<1,000 feet Low potential to occur. There is suitable vegetative habitat but not suitable soils. Ceanothus verrucosus Wart-stemmed ceanothus None/None/ Covered^ 2.2 Chaparral/evergreen shrub/December-May/< 1,250 feet. Absent. This species would have been observed if present. Centromadia parryispp. australis Southern tarplant None/None/ None 1B.1 Marshes and swamps (margins), valley and foothill grassland (vernally mesic), vemal pools/annual herb/May-November/< 400 feet Low potential to occur. There is no suitable habitat within the project area. Centromadia pungensssp. laevis Smooth tarplant None/ None/None 1B.1 Chenopod scrub, meadows and seeps, playas, riparian woodland, valley and foothill grassland; alkaline/annual herb/April-September/<1580 feet Low potential to occur. There is no suitable habitat within the project area. Chaenactis glabriuscula Ma!, orcuttiana Orcutt's pincushion None/ None/None 1B.1 Coastal bluff scrub, coastal dunes/annual herb/ January -August/10 to 330 feet Moderate potential to occur within the coastal scrub on site. Chorizanthe orcuttiana Orcutt's spineflower FE/SE/Covered, NE 1B.1 Maritime chaparral, closed-cone conifer forest, coastal scrub; sandy soils/annual herb/March- May/< 400 feet Low potential to occur; suitable sandy soils within coastal sage scrub on site, but species is known from only one occurrence in San Diego County. Chorizanthe polygonoides var. longispina Long-spined spineflower None/ None/None 1B.2 Chaparral, coastal scrub, meadows and seeps, valley and foothill grassland; often clay/annual herb/April-July/100 to 5,000 feet Low potential to occur. There is suitable vegetative habitat but not suitable clay soils. DUDEK 31 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Table 3 Special-Status Plant Species Observed or Potentially Occurring on the Project Site Scientific Name Common Name Status Federal/ State/City CNPS Primary Habitat Associations/Life Form/ Blooming Period/Elevation Range ' . Status On Site or Potential to Occur Clarkia delicata Delicate clarkia None/ None/None 1B.2 Chaparral, cismontane woodland/annual herb/ April-June/770 to 3.300 feet Low potential to occur. There is suitable vegetative habitat but the project area is located below the elevation range for this species. Comarostaphylis divers/folia ssp. divers/folia Summer-holly None/None/ Covered^ 1B.2 Chaparral, cismontane woodland/evergreen shrub/April-June/100-1,800 feet Absent. This species would have been observed if present. Corethrogyne filaginifoliaMa^. incana San Diego sand aster None/ None/None 1B.1 Chaparral, coastal bluff scrub, coastal scrub/ perennial herb/June-September/10-380 feet Absent. This genus would have been identified if present. Corethrogyne filaginifoliaMax. linifolia Del Mar Mesa sand aster None/None/ Covered2, NE 1B.1 Coastal bluff scrub, maritime chaparral (openings), coastal scrub; sandy/perennial herb/May-September/10 to 380 feet Absent, This genus would have been identified if present. Dudleya blochmaniae spp. blochmaniae Blochman's dudleya None/None/NE 1B.1 Chaparral, coastal bluff scrub, coastal scaib, valley and foothill grassland, rocky; often clay or serpentinite/perennial herb/April to June/15 to 1,500 feet Low potential to occur. There is suitable vegetative habitat, but the project area lacks suitable soils. Dudleya brevifolia Short-leaved dudleya None/SE/NE 1B.1 Maritime chaparral (openings), coastal scrub; Torrey sandstone/perennial herb/April/100-800 feet Low potential to occur. There is suitable vegetative habitat, but the Project Area lacks suitable soils. Dudleya multicaulis Many-stemmed dudleya None/ None/None 1B.2 Chaparral, coastal scrub, valley and foothill grassland; often clay/perennial herb/April-July/ 50-2,600 feet Low potential to occur. There is suitable vegetative habitat, but the project area lacks suitable soils. Dudleya variegata Variegated dudleya None/ None/None 1B.2 Chaparral, cismontane woodland, coastal scrub, valley and foothill grassland, vernal pools; clay/perennial herb/April-June/< 1,900 feet Low potential to occur. There is suitable vegetative habitat, but the project area lacks suitable soils. DUDEK 32 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Tables Special-Status Plant Species Observed or Potentially Occurring on the Project Site Scientific Name Common Name Status Federal/ % State/City CNPS Primary Habitat Associations/Life Form/ Blooming Period/Elevation Range Status On Site or Potential to Occur Dudleya visada Sticky dudleya None/None/ Covered"! 1B.2 Coastal bluff scrub, chapan'al, coastal scrub; rocky/perennial herb/May-June/30 to 1,800 feet Low potential to occur. There is suitable vegetative habitat, but the project area lacks suitable soils. Eryngium aristulatumMar. parishii San Diego button-celery FE/SE/ Covered2, NE IB;I Coastal scrub, valley and foothill grassland, vernal pools, mesic/annual-perennial herb/ April-June/60 to 2,000 feet Low potential to occur. There are no suitable mesic conditions within the project area. Eryngium pendletonensis Pendleton button-celery None/ None/None 1B.1 Coastal bluff scrub, valley and foothill grassland, vernal pools; clay, vernally mesic/ perennial herb/April-June/50 to 360 feet Low potential to occur. There are no suitable mesic conditions or clay soils within the project area. Erysimum ammophilum Sand-loving wallflower None/ None/None 1B.2 Maritime chaparral, coastal dunes, coastal scrub; sandy, openings/ perennial herb/ February-June/<200 feet Moderate potential to occur within the coastal scrub on site; suitable sandy soils present Euphorbia misera Cliff spurge None/None/ Covered 2.2 Coastal bluff scrub, coastal scrub, Mojavean desert scrub; rocky/shrub/December-August/ 30 to 1,650 feet Low potential to occur. There is suitable vegetative habitat, but the project area lacks suitable soils. Ferocactus viridescens San Diego barrel cactus None/None/ Covered^ 2.1 Chaparral, coastal scrub, valley and foothill grassland, vernal pools/perennial stem succuient/May-June/< 1,500 feet Absent. This species would have been observed if present. Hazardia orcuttii Orcutt's hazardia FC/ST/Covered, NE 1B.1 Maritime chaparral, coastal scrub; often clay/ evergreen shrub/August-October/250 to 280 feet Absent. This species would have been observed if present. Heterotheca sessiliflora ssp. sessiliflora Beach goldenaster None/ None/None 1B.1 Coastal dunes, coastal scrub, coastal chaparral/annual herb/July to November/< 35 feet Moderate potential to occur within the coastal scrub on site; suitable sandy soils are present. DUDEK 33 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Table 3 Special-Status Plant Species Observed or Potentially Occurring on the Project Site Scientific Name Common Name Status Federal/ - State/City CNPS Primary Habitat Associations/Life Form/ Blooming Period/Elevation Range Status On Site or Potential to Occur Horkelia truncata Ramona horkelia None/ None/None 1B.3 Chaparral, cismontane woodland, clay, gabbroic/perennial herb/May-June/1,300 to 4,300 feet Low potential to occur. There is suitable vegetative habitat, but the project area lacks suitable soils. Juncus acutus ssp. leopoldii southwestern spiny rush None/None/ None 4.2 Coastal dunes, meadows and seeps (alkaline), coastal marshes and swamps; mesic/ rhizomatous herb/May-June/9 to 2,950 feet. Observed on site within coastal sage scrub in the Hoover/Lagoon project area. One individual was observed adjacent to the impact area, at the periphery of the 250-foot buffer. Another individual was observed off site, south of the impact area. Isocoma menziesi/var. decumbens Decumbent goldenbush None/ None/None 1B.2 Chaparral, coastal scrub (sandy, often disturbed areas)/shrub/April-November/30 to 450 feet Absent. This species would have been observed if present. Iva hayesiana San Diego marsh-elder None/None/ Covered^ 2.2 Marshes and swamps, playas/ perennial herb/ April-November/30 to 1650 feet Absent. This species would have been observed if present. Lasthenia glabratassp. coulteri Coulter's goldfields None/ None/None 1B.1 Saltwater marsh and swamps, playas, vernal pools/annual herb/February-June/<4,000 feet Moderate potential to occur within the coastal brackish marsh on site. ' Lepidium virginicumvar. robinsonii Robinson's pepper-grass None/ None/None 1B.2 Chaparral, coastal scrub/annual herb/January- July/< 2,900 feet Moderate potential to occur within the coastal scrub on site. Leptosyne maritima Sea dahlia None/ None/None 2.2 Coastal bluff scrub, coastal scrub/perennial herb/March-May/I 5 to 500 feet Moderate potential to occur within the coastal scrub on site. Acmispon prostrates [Lotus nuttallianus] Nuttall's acmispon [lotus] None/ None/None 1B.1 Coastal dunes, coastal scrub; sandy/annual herb/March-June/< 35 feet Moderate potential to occur within the coastal scrub on site. DUDEK 34 7216 April 2012. Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Table 3 Special-Status Plant Species Observed or Potentially Occurring on the Project Site Scientific Name ' Common Name Status Federal/ State/City CNPS Primary Habitat Associations/Life Form/ ' Blooming Period/Elevation Range Status On Site or Potential to Occur Monardella hypoleucassp. lanata Felt-leaved monardella None/ None/None 1B.2 Chaparral, cismontane woodland/rhizomatous herb/June-August/1,000 to 3,600 feet Low potential to occur. There is no suitable habitat; project area located below the elevation range for this species. Myosurus minimus ssp. apus Little mousetail None/ None/Covered^, NE 3.1 Vernal pools, valley and foothill grassland; alkaline/annual herb/March-June/60 to 2,100 feet Low potential to occur. There is no suitable habitat within the project area. Nama stenocarpum Mud nama None/ None/None 2.2 Marshes and swamps, lake margins, riverbanks/annual-perennial herb/January-July/ 15 to 1,650 feet Low potential to occur. There is no suitable habitat within the project area. Navarretia fossalis Spreading navarretia FT/None/ Covered2, NE 1B.1 Chenopod scrub, shallow freshwater marshes and swamps, playas, vernal pools/annual herb/ April-June/100 to 4,300 feet Low potential to occur. There is no suitable habitat within the project area. Nemacaulis denudata\/ar. denudata Coast woolly-heads None/ None/None 1B.2 Coastal dunes/annual herb/April-September/< 330 feet Low potential to occur. There is no suitable habitat within the project area. Molina cismontana Chaparral nolina None/ None/None 1B.2 Chaparral, coastal scrub; sandstone orgabbro/ evergreen shrub/May-July/460 to 4,200 feet Absent. This species would have been observed if present. Orcuttia califomica • California Orcutt grass FE/SE/ Covered^, NE 1B.1 Vernal pools/annual herb/April-August/50 to 2,200 feet Low potential to occur. There is no suitable habitat within the project area. Phacelia stellaris Brand's phacelia FC/None/None 1B.1 Coastal dunes, coastal scrub/annual herb/ March-June/<1,300 feet Low potential to occur. Suitable habitat is present within the coastal scrub on site; however, the closest species records are in Camp Pendleton and San Diego Bay. Pinus torreyanaspp. torreyana Torrey pine None/None/ Covered^ 1B.2 Closed-cone conifer forest, chaparral; sandstone/evergreen tree/NA/250 to 550 feet Absent. This species would have been observed if present. DUDEK 35 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Table 3 Special-Status Plant Species Observed or Potentially Occurring on the Project Site Scientific Name Common Name Status Federal/ State/City CNPS Primary Habitat Associations/Life Form/, Blooming Period/Elevation Range Status On Site or Potential to Occur Quercus dumosa Nuttall's scrub oak None/None/ Covered 1B.1 Chaparral, coastal scrub, closed-cone coniferous forest; sandy, clay loam/evergreen shrub/February-April/50 to 1,300 feet Absent. This species would have been observed if present. Quercus engelmannii Engelmann oak None/None/ Covered^ 4.2 Chaparral, cismontane woodland, riparian woodland, valley and foothill grassland/ deciduous tree/March-June/400 to 4,250 feet Absent. This species would have been observed if present. Stemodia durantifolia Purple stemodia None/ None/None 2.1 Sonoran desert scrub; often mesic, sandy/ perennial herb/January-December/600 to 1,000 feet Low potential to occur. There is no suitable habitat within the project area. Suaeda esteroa Estuary seablite None/ None/None 1B.2 Coastal salt marshes and swamps/perennial herb/May to October (Jan)/< 20 feet Absent. This species would have been obsen/ed if present. Tetracoccus dioicus Parry's tetracoccus None/ None/None 1B.2 Chaparral, coastal scrub/deciduous shrub/ April-May/550 to 3,300 feet Absent. This species would have been observed if present. This table includes all HMP species and CNPS and CNDDB species within an 8-quad search of the sun-ounding quadrangles: Las Pulgas Canyon, Morro Hill, Bonsall, Oceanside, San Luis Rey, San Marcos, Encinitas, and Rancho Santa Fe. Legend FE: FT: FC: SE: ST: Federally listed as endangered Federally listed as threatened • Federal species of concern State-listed as endangered State-listed as threatened HMP Status: Covered: Take of species permitted under HMP Take of species permitted, subject to HMP conditions for Narrow Endemic species Take of species permitted subject to HMP conditions for Obligate Wetlands species Species Coverage contingent on other MHCP Subarea Plans being permitted (List 2) Species Coverage contingent on funding for management of conserved areas (List 3) • NE: OW: .1 2 DUDEK 36 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Table 4 Special-status Wildlife Species Observed or Potentially Occurring in the Project Area Scientific Name Common Name Status Federal/State/HMPi Primary Habitat Associations Status On Site or Potential to Occur - " ' ' 'l.' -Amphibians and Reptiles Anaxyrus califomicus arroyo toad FE/SSC/NE Stream channels for breeding (typically 3rd order); adjacent stream terraces and uplands for foraging and wintering Not expected to occur due to lack of suitable stream habitat. Aspidoscelis hyperythra orange-throated whiptail None/SSC/ Covered Coastal sage scrub, chaparral, grassland, juniper and oak woodland Moderate potential; suitable habitat is present. Aspidoscelis tigris stejnegeri coastal whiptail None/None/None Coastal sage scrub, chaparral; sandy areas, gravelly arroyos, or washes Moderate potential; suitable habitat is present. . Charina trivirgata rosy boa None/None/None Rocky chaparral, coastal sage scrub, oak woodlands, desert and semi-desert scrub Low. potential; although suitable vegetative habitat is present, rocky habitat is not present. In addition, current disturbance and nearby development may preclude their presence. Crotalus ruber red-diamond rattlesnake None/SSC/None Variety of shrub habitats where there is heavy brush, large rocks, or boulders Low potential; although suitable vegetative habitat is present, rocky habitat is not present. In addition, current disturbance and nearby development may preclude their presence. Diadophis punctatus similis San Diego ringneck snake None/None/None Open, rocky areas in moist habitats near intermittent streams: marsh, riparian woodland, sage scrub Low potential to occur due to lack of suitable stream, riparian habitat or othenwise moist microhabitat features. Emys marmorata western pond turtle None/SSC/None Slow-moving permanent or intermittent streams, ponds, small lakes, reservoirs with emergent basking sites; adjacent uplands used during winter Notexpected to occur due to lack of suitable stream or pond habitat. Phrynosoma blainvillii coast horned lizard None/SSC/None Coastal sage scrub, annual grassland, chaparral, oak and riparian woodland, coniferous forest Low potential; not observed; although suitable habitat is present, current disturbance and nearby development may preclude their presence. DUDEK 37 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Table 4 Special-status Wildlife Species Observed or Potentially Occurring in the Project Area V .Scientific NaniiB : : C'ommon.Name Status - Federal/State/HMPi ; Primary Habitat Associations ' Status On Site or Potential to Occur Plestiodon skiltonianus interparietalis Coronado Island skink None/SSC/None Grassland, woodlands, pine forests, chaparral, especially in open sunny areas such as clearings and the edges of creeks and rivers; prefers rocky areas near streams with lots of vegetation; also found in areas away from water Low potential; although suitable vegetative habitat is present, appropriate litter or cover is generally not present. In addition, current disturbance and nearby development may preclude their presence. Salvadora hexalepis virgultea coast patch-nosed snake None/SSC/None Chaparral, washes, sandy flats, rocky areas Low potential; although suitable vegetative habitat is present, rocky habitat is not present. In addition, current disturbance and nearby development may preclude their presence. Spea hammondii western spadefoot None/SSC/None Most common in grasslands, coastal sage scrub near rain pools or vernal pools; riparian habitats Not expected to occur due to lack of suitable pools or riparian habitats. Thamnophis hammondii two-striped garter snake None/SSC/None Marshes, meadows, sloughs, ponds, slow- moving water courses Not expected to occur due to lack of suitable pond or stream habitat. Thamnophis sirtalis ssp. south coast garter snake None/SSC/None Utilizes a wide variety of habitats - forests, mixed woodlands, grassland, chaparral, farmlands, often near ponds, marshes, or streams Not expected to occur due to lack of suitable habitat. Birds Accipiter cooperii (nesting) Cooper's hawk NoneA/VL/Covered Ripanan and oak woodlands, montane canyons Not expected to nest due to lack of suitable habitat. Aimophila ruficeps canescens southern Califomia rufous- crowned sparrow None/WL/Covered Grass-covered hillsides, coastal sage scrub, chaparral with boulders and outcrops Low potential; although suitable vegetative habitat is present, boulders and outcrops not present. In addition, current disturbance and nearby development may preclude their presence. DUDEK 38 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Table 4 Special-status Wildlife Species Observed or Potentially Occurring in the Project Area , Scientific Name Common Name Status Federal/State/HMP1 V Primary Habitat Associations Status On Site or Potential to Occur Charadrius alexandrinus nivosus (nesting) western snowy plover (coastal population) FT, BCC/SSC/ Covered Nests primarily on coastal beaches, in flat open areas, with sandy or saline substrates; less commonly in salt pans, dredged spoil disposal sites, dry salt ponds and levees Low potential to occur due to lack of suitable habitat. The beach within the project area is nan'ow and provides little habitat for nesting. Historical data from the CNDDB was recorded within the lagoon in 1978 (CDFG 2012a). Circus cyaneus northern harrier None/SSC/None Open wetlands (nesting), pasture, old fields, dry uplands, grasslands, rangelands, coastal sage scrub Low potential; grassland on site is of small extent and of little foraging value. In addition, adjacent development may preclude occurrence. Dendroica petechia brewsteri yellow warbler BCC/SSC/None Nests in lowland and foothill riparian woodlands dominated by cottonwoods, alders and willows; winters in a variety of habitats Not expected to occur due to lack of suitable riparian woodland habitat. Elanus leucurus white-tailed kite None/FP/None Open grasslands, savanna-like habitats, . agriculture, wetlands, oak woodlands, riparian Low potential; grassland on site is of small extent and of little foraging value. No breeding opportunities. In addition, adjacent development may preclude occurrence. Empidonax traillii extimus (nesting) southwestern willow flycatcher FE/SE/Covered Riparian woodlands along streams and rivers with mature, dense stands of willows or alders; may nest in thickets dominated by tamarisk Not expected to occur due to lack of suitable riparian habitat. Eremophila alpestris actia California horned lark NoneAA/L/None Open habitats, grassland, rangeland, shortgrass prairie, montane meadows, coastal plains, fallow grain fields Low potential; although suitable vegetative habitat is present. This species may forage in the coastal sage scrub and ruderal habitat; little suitable nesting habitat within project area. Falco peregrinus anatum American peregrine falcon (FD), BCC/(SD), FP/Covered Nests on cliffs, buildings, bridges; forages in wetlands, riparian, meadows, croplands, especially where waterfowl are present Moderate potential; may occur as a winter visitor to forage in the lagoon. Would not nest. Not observed during surveys. DUDEK 39 7216 April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams Table 4 Special-status Wildlife Species Observed or Potentially Occurring in the Project Area Scientific Name Common Name Status Federal/State/HMPi Primary Habitat Associations Status On Site or Potentiarto Occur Icteria virens (nesting) yellow-breasted chat None/SSC/Covered Dense, relatively wide riparian woodlands and thickets of willows, vine tangles, and dense brush Not expected to occur due to lack of suitable riparian habitat. Ixobrychus exilis least bittern BCC/SSC/None Dense emergent wetland vegetation, sometimes interspersed with woody vegetation and open water Not expected to occur due to lack of suitable habitat; suitable habitat may occur elsewhere in the lagoon. Laterallus jamaicensis coturniculus California black rail BCC/ST, FP/None Occurs most commonly in tidal emergent wetlands dominated by pickleweed, or in brackish marshes supporting bulrushes in association with pickleweed; in freshwater, usually found in bulrushes, cattails, and saltgrass Not expected; while suitable habitat is found in the lagoon, only limited suitable habitat is found within the project area. Historical records (1973) for this species are from nearby San Elijo Lagoon (CDFG 2012a); however, very few of these birds have been obsen/ed within the county in the last 30 years. Pandion haliaetus (nesting) osprey NoneA/VL/Covered . Large waters (lakes, reservoirs, rivers) supporting fish; usually near forest habitats, but widely observed along the coast . Not expected to nest. No suitable nesting opportunities. Moderate potential to forage nearby in wetland habitat. Not observed during surveys. Passerculus sandwichensis beldingi Belding's savannah sparrow None/SE/Covered Saltmarsh, pickleweed Low to moderate potential; not observed; very little suitable habitat within project area but may be able to use it for foraging. Known occurrence recorded from the vicinity of the project area in pickleweed marsh habitat in 2001 (CDFG 2012a). Passerculus sandwichensis rostratus (wintering) large-billed savannah sparrow None/SSC/Covered Saltmarsh, pickleweed Moderate potential; not observed; suitable foraging habitat present. Usually occurs within mixed flocks of sparrows during the winter. Pelecanus erythroihynchos (nesting colony) American white pelican None/SSC/None Coastal bays, inlets, estuaries with forage fish for winter range; breeds on isolated islands in freshwater lakes and forages on inland marshes, lakes, or rivers Not expected to nest. Very rare breeder in county and not in colonial situations. Recorded foraging in open water within the Hoover/Lagoon project area. DUDEK 40 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Table 4 Special-status Wildlife Species Observed or Potentially Occurring in the Project Area Scientific Name Common Name Status Federal/State/HMPi Primary Habitat Associations Status On Site or Potential to Occur - Pelecanus occidentalis califomicus (nesting colony and communal roosts) California brown pelican (FD)/(SD), FP/Covered Open sea, large water bodies, coastal bays and harbors Not expected to nest or colonially roost. Unsuitable Moderate potential to utilize open water in project area; observed foraging within lagoon but not within project area; no nesting or foraging habitat is within the project area. Pleg ad is chihi (rookery site) white-faced ibis NoneA/VL/Covered Nests in marsh; winter foraging in shallow lacustrine waters, muddy ground of wet meadows, marshes, ponds, lakes, rivers, flooded fields and estuaries Not expected to nest. Site does not include suitable rookery habitat. Polioptila californica californica coastal California gnatcateher FT/SSC/Covered Coastal sage scrub, coastal sage scrub- chaparral mix, coastal sage scrub- grassland ecotone, riparian in late summer High potential. Suitable coastal sage scrub habitat on site and in the vicinity of the project area. Known to occur in the vicinity of the project area. Rallus longirostris levipes light-footed clapper rail FE/SE, FP/Covered Coastal saltmarsh Low potential; not observed; no suitable habitat in project area but may forage adjacent to the lagoon elsewhere. Known from occurrence data within the lagoon in 2007 (CDFG 2012a). Riparia riparia bank swallow None/ST/None Vertical banks or cliffs in lowland areas along coasts, rivers, streams lakes, reservoirs, wetlands Not expected to occur. Potentially suitable habitat availatjle but limited in extent. Historical observations in the vicinity along Santa Margarita River are presumed extirpated (1919,1925) (CDFG 2012a). Sternula [^Sterna] antillarum browni (nesting colony) California least tern FE/SE, FP/Covered Coastal waters, estuaries, large bays and harbors, mudflats; nests on sandy beaches Not expected to nest. Not observed; no nesting habitat available; may forage in lagoon; may rest on beach area within project site. Known from occurrence data within the lagoon in 1996 on salt flats (CDFG 2012a). Thalasseus [=Sterna] elegans (nesting colony) elegant tern NoneAA/L/Covered Coastal waters, estuaries, large bays and harbors, mudflats Not expected to nest; not observed; no nesting habitat available; may forage in lagoon; may rest on beach area within project site. DUDEK 41 7216 April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams Table 4 Special-status Wildlife Species Observed or Potentially Occurring in the Project Area • Scientific Name Common Name Status Federal/State/HMPi ; Primary Habitat Associations : Status On Site or Potentialto Occur' Vireo bellii pusillus (nesting) least Bell's vireo FE/SE/Covered Nests in southern willow scrub with dense cover within 1 to 2 meters of the ground; habitat includes willows, cottonwoods, baccharis, wild blackberry, or mesquite on desert areas Not expected to occur; not obsen/ed; no suitable southern willow scrub habitat in project area. - • Mamrhals Antrozous pallidus pallid bat None/SSC/None Rocky outcrops, cliffs, and crevices with access to open habitats for foraging Moderate potential; no suitable rocky outcrops or cliffs associated with the project area. Open habitats surrounding the lagoon may be utilized for foraging. Chaetodipus califomicus femoralis Dulzura pocket mouse None/SSC/None Coastal sage scrub, chaparral, riparian- scrub ecotone; more mesic areas Moderate potential; project area contains moderately suitable habitat and the species is fairly common within the region. Chaetodipus fallax fallax northwestern San Diego pocket mouse None/SSC/None Coastal sage scrub, grassland, sage scrub- grassland ecotones, sparse chaparral; rocky substrates, loams, and sandy loams Low potential; project area contains some suitable habitat but does not contain required rocky habitat. Choeronycteris mexicana Mexican long- . tongued bat None/SSC/None Caves, mines, buildings in desert and montane riparian, desert succulent shrub, desert scrub, and pinyon-juniper habitats Not expected to occur; no suitable vegetative habitat or . rocky outcrops or cliffs associated with the project area. Dipodomys Stephens! Stephens' kangaroo rat FE/ST/None Open habitat grassland, sparse coastal sage-scrub, sandy loam and loamy soils with low clay content; gentle slopes (<30%) Not expected to occur due to lack of suitable habitat and soil types. Outside of range. Eumops perotis califomicus western mastiff bat None/SSC/None Roosts in small colonies in cracks and small holes, seeming to prefer man-made structures Moderate potential; no suitable rocky outcrops or cliffs associated with the project area. Open habitats surrounding the lagoon may be utilized for foraging. Lasiurus cinereus hoary bat None/None/None Woodlands and forests with large trees, dense foliage Not expected to occur; no suitable habitat associated with the project area. Lasiurus xanthinus western yellow bat None/SSC/None Valley foothill riparian, desert riparian, desert wash, and palm oasis. Not expected to occur; no suitable habitat associated with the project area. DUDEK 42 7216 April 2012 Corrugated Metal Pipe Replacement Program Hoover/Lagoon and Highland/Adams Table 4 Special-status Wildlife Species Observed or Potentially Occurring in the Project Area Scientific Name Common Name Status Federal/State/HMPi :f Primary.Habitat Associations Status On Site or Potential to Occur - Lepus califomicus bennettii San Diego black- tailed jackrabbit None/SSC/None Arid habitats with open ground; grasslands, coastal sage scrub, agriculture, disturbed areas, rangelands Low potential; not observed; although suitable habitat is present, current disturbance and nearby development may preclude their presence. Myotis yumanensis . Yuma myotis None/None/None Closely tied to open water, which is used for foraging; open forests and woodlands are optimal habitat Moderate potential; no suitable vegetative habitat or rocky outcrops or cliffs associated with the project area. Lagoon may be utilized for foraging. Neotoma lepida intermedia San Diego desert woodrat None/SSC/None Coastal sage scrub, chaparral, pinyon- juniper woodland with rock outcrops, cactus thickets, dense undergrowth Not expected; marginal habitat quality and no rocky or boulder areas. NycHnomops femorosaccus pocketed free- tailed bat None/SSC/None Rocky desert areas with high cliffs or rock outcrops Not expected; no suitable rocky outcrops or cliffs associated with the project area. Perognathus longimembris pad ficus Pacific pocket mouse FE/SSC/NE Grassland, coastal sage scrub with sandy soils; along immediate coast Low potential; within range and suitable habitat; however, vicinity has been surveyed extensively over the past 15 years and none have been located. The closest known extant population is on Camp Pendleton. Taxidea taxus American badger None/SSC/None Dry, open, treeless areas; grasslands and coastal sage scrub Not expected; not observed; although suitable habitat is present, current disturbance and nearby development likely preclude their presence. Fish Eucyclogobius newberryi tidewater goby FE/SSC/None Low-salinity waters in coastal wetlands Not expected; no suitable habitat in project area although suitable habitat likely elsewhere in the lagoon. There are historical records from the eastern end ofthe lagoon (1984) (CDFG 2012a). Gila orcuttii arroyo chub None/SSC/None Slow-flowing or backwater areas, sand or mud substrate in cool to warm streams. Not expected; no suitable stream habitat in project area. DUDEK 43 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Table 4 Special-status Wildlife Species Observed or Potentially Occurring in the Project Area Scientific Name Common Name Status Federal/State/HMPi Primary Habitat Associations Status On Site or Potential to Occur Invertebrates Branchinecta sandiegonensis San Diego fairy shrimp FE/None/Covered' Small, shallow vernal pools, occasionally ditches and road ruts Not expected; no suitable vernal pool habitat in project area. Cicindela senilis frosti senile tiger beetle None/None/None Marine saltmarsh Moderate potential; suitable brackish marsh habitat within the project area although it is minimal in extent No recent records exist for the species near the project area. Danaus plexippus monarch butterfly None/None/None Ovenwinters in eucalyptus groves Moderate potential; no eucalyptus groves within the project area to roost in, but likely occurs during migration periods or generally during the year. Euphyes vestris harbisoni Harbison's dun skipper None/None/Covered, NE Restricted to wetland, riparian, oak woodlands, and chaparral habitats supporting host plant Carexspissa Not expected; host plant is not recorded within the project area. Euphydryas editha quino Quino checkerspot butterfly FE/None/None Sparsely vegetated hilltops, ridgelines, occasionally rocky outcrops; host plant Plantago erecta and nectar plants must be present Not expected; host plant is not recorded within the project area, and outside of currently accepted range. Lycaena hermes Hermes copper None/None/NE Coastal sage scrub, southern mixed chaparral supporting at least 5% cover of host plant Rhamnus crocea Not expected; host plant is not recorded within the project area and outside of cun-ently accepted range. Panoquina errans Wandering (= saltmarsh) skipper None/None/Covered Saltmarsh from Los Angeles to Baja, Mexico Moderate potential; suitable brackish marsh habitat within the project area although it is minimal in extent No recent records exist for the near'the project area. Streptocephalus woottoni Riverside fairy shrimp FE/None/Coveredi Deep, long-lived vernal pools, vernal pool- like seasonal ponds, stock ponds; warm water pools that have low to moderate dissolved solids Not expected; no suitable vernal pool habitat in project area. DUDEK 44 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Table 4 Special-status Wildlife Species Observed or Potentially Occurring in the Project Area . Scientific Name Common Name Status Federal/State/HMPi 1 Primary Habitat Associations Status On Site or Potential to Occur Tryonia imitator mimic tryonia (=California brackishwater snail) None/None/None Stream mouth, often in fine sandy mud, coarse silty mud, or coarse gravel Low potential; no suitable habitat in project area although suitable habitat likely elsewhere in the lagoon. There are historical records from the lagoon in 1981 (CDFG 2012a). This table includes all HMP species and CNDDB species within an 8-quad search of the surrounding quadrangles: Las Pulgas Canyon, Morro Hill, Bonsall, Oceanside, San Luis Rey, San Marcos, Encinitas, and Rancho Santa Fe. . Federal Designations: FC: FD: FE FT:' State Designations: SSC: Species of Special Concern P: California Department of Fish and Game Protected and Fully Protected Species SE: State-listed as Endangered ST: State-listed as Threatened Candidate for federal listing as threatened or endangered Federally delisted; monitored for five years Federally listed Endangered Federally listed as Threatened HMP Status: Covered: Take of species permitted under HMP NE: Take of species permitted subject to HMP conditions for Narrow Endemic species FP: Fully protected ^ Species Coverage contingent on funding for management of conserved areas (List 3) DUDEK 45 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams 6.4 Jurisdictional Delineation The jurisdictional determinations provided in this report are considered preliminary; final determinations would require completion of significant nexus analysis and confirmation with the wetlands resource agencies staff. The preliminary determinations are provided to determine the maximum extent of potential jurisdictional areas and, therefore, define the area of necessary impact avoidance to avoid any requirement for wetlands permits. A jurisdictional delineation was completed for the Hoover/Lagoon project area; there are no wetland features within the Highland/Adams project area. Three agencies (ACOE, RWQCB, and CCC) have jurisdiction up to 18 inches above mean ordinary high tide elevation, regardless of whether the lands within that area support any of the three wetland criteria (vegetation, soils, and hydrology). Based on the results of the jurisdictional delineation, it was determined that one area above this jurisdictional line also meets the wetland definition of supporting all three wetland criteria: coastal brackish marsh. The coastal brackish marsh is, therefore, under the jurisdiction of ACOE, RWQCB, and CCC (Table 5). CDFG, under its Lake and Streambed program, does not regulate marine environments and wetland mainly supported by tidal conditions. The shoreline and wetlands within the Hoover/Lagoon area are marine environments supported by tidal conditions and therefore not regulated by CDFG. Tables Results of Jurisdictional Delineation Vegetation Community/Land Cover Type Jurisdiction Jurisdiction Type ' Jurisdictional Acres Open Water ACOE, RWQCB, CCC ACOE/RWQCB Non-wetland waters/CCC tidelands 1.92 Beach ACOE, RWQCB, CCC ACOE/RWQCB Non-wetland waters/CCC tidelands 0.18* Coastal Brackish Marsh ACOE, RWQCB, CCC ACOE/RWQCB & CCC Wetlands 0.06 Total" — 2.16 *A portion of the area mapped as beach is within 18 inches of mean ordinary high tide and is therefore jurisdictional; a portion is above this elevation and is not jurisdictional. The total area mapped as beach is 0.47 acre. "Totals may not sum due to rounding. 7.0 IMPACTS Impacts associated with the proposed project are both permanent and temporary, direct and indirect. Direct permanent impacts consist ofthe footprint of pipe outiets and associated drainage structures within both of the project areas. Indirect permanent impacts could result from the type of discharge/runoff associated with the project such as polluted runoff or erosive velocities. However, the projects are repair projects and do not alter existing discharges. Furthermore, the DUDEK 46 7216 April.2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams design of the rehabilitation projects has been evaluated by project engineers to determine appropriate siting in relation to existing topography and sizing of pipes, headwall, and energy dissipaters, to avoid erosion, sedimentation, or other forms of hydromodification. Therefore, indirect permanent impacts would not occur at either project location. Direct temporary impacts result from construction areas surrounding the pipe outlets and trenching for an estimated 24 linear feet of pipe immediately upstream of the drainage outfall at the Hoover/Lagoon project site. Indirect temporary impacts would include noise, dust, and foot traffic associated with construction activities. Relining of the existing pipelines will not result in impacts, (either temporary or permanent) because all construction will be completed within the existing pipeline.- All staging of materials, vehicles, and other equipment will occur within developed roadways or disturbed lots devoid of biological resources, and therefore no impacts would occur due to staging. Anticipated direct impacts to vegetation communities and land cover types are listed in Table 6. There will be permanent and temporary impacts to coastal sage scrub and beach; temporary impacts to coastal sage scrub, beach, and disturbed habitat will result. The areas of impact to beach are located the jurisdictional elevation limit and therefore, no impacts to jurisdictional resources would occur. There will be no impacts to open water, coastal brackish marsh, disturbed coastal sage scrub, non-native grassland, or developed areas. Table 6 Impacts to Vegetation Communities within the Project Area Project Area Vegetation Community/ Land Cover Type Permanent Impacts (square feet) Temporary Impacts (square feet) Total Impacts (square feet) Hoover/Lagoon Beach 48 358 406 Hoover/Lagoon Disturbed Habitat — 352 352 Highland/Adams Coastal Sage Scrub 49 400 449 Tatar 97 1,110 1,207 Totals may not sum due to rounding. ' 7.1 Permanent Impacts A total of 97 square feet of permanent impacts will result from the construction of pipe outlets within the Highland/Adams and Hoover/Lagoon project areas. DUDEK 47 7216 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams 7.1.1 Hoover/Lagoon Permanent impacts associated with this project are limited to replacement ofthe drainage outfall structure within an area mapped as non-jurisdictional beach (Table 6). Permanent impacts will occur to 48 square feet of beach resulting from construction of 1) catch basin, 2) storm drain cleanout, 3) concrete drainage ditch, 4) concrete dike, 5) 6-inch curb, 6) headwall, and 7) riprap energy dissipater. 7.1.2 Highland/Adams Permanent impacts associated with this project are limited to replacement of the drainage outfall structure within an area mapped as coastal sage scrub (Table 6). Permanent impacts will occur to 49 square feet of coastal sage scrub resulting from construction of 1) two catch basins, 2) two storm drain cleanouts, 3) a concrete drainage swale, 4) a concrete drainage ditch, 5) a concrete spillway, and 6) a riprap energy dissipater. 7.2 Temporary Impacts A total of 1,110 square feet of temporary impacts will result from the utilization of work areas within the Highland/Adams and Hoover/Lagoon project areas. 7.2.1 Hoover/Lagoon 7.2.1.1 Direct Impacts Near the drainage outfall, a section of pipe, estimated at 24 linear feet, will need to be replaced. Replacement will occur through trenching, removal of the existing pipe, replacement with new pipe, and backfilling the trench. This area of temporary impact will also allow for construction of the drainage outfall stmcture. The temporary construction area will occupy approximately 358 square feet of beach and 352 square feet of disturbed habitat, totaling 709 square feet (Table 6). If it is determined during construction that more than 24 linear feet of pipe require replacement through trenching (as opposed to cured-in-place relining, currently planned), additional temporary impacts would occur to disturbed habitat between the current limits of temporary impact and the terminus of Hoover Street. 7.2.1.2 Indirect Impacts Temporary indirect impacts during construction may include noise and ground vibration from the equipment used to perform the pipeline replacement and related construction activities. These indirect impacts may result in disturbance to native wildlife species, such as the coastal 7216 DUDEK 48 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams California gnatcateher and other observed or potentially occurring special-status species as listed in Table 4. The short-term nature of this project is not expected to result in indirect impacts to wildlife. movement, even if work is conducted during the nesting season. Indirect impacts to adjacent plant communities, including jurisdictional wetlands and habitat potentially supporting several special-status species (as listed in Tables 3 and 4), may occur from fugitive dust, pollution discharge from runoff, and litter/trash/debris. 7.2.2 Highland/Adams 7.2.2.^ Direct Impacts The temporary impact area at the Highland/Adams site is only associated with installation ofthe drainage outfall structure. This area is located directly adjacent to Adams Street, occupying 400 square feet of coastal sage scrub, on the edge of a large contiguous area of coastal sage scrub habitat (Tabfe 6). 7.2.2.2 Indirect Impacts The indirect impacts in the Highland/Adams project area are similar to those described previously for Hoover/Lagoon. In summary, if construction activities occur within the nesting season, impacts to nesting birds, including from noise and ground vibration, will be significant, absent mitigation. Potential fijgitive dust, polluted runoff, and litter/trash/debris during construction activities may potentially impact coastal sage scrub supporting several special-status species. Additionally, the short-term nature of this project is not expected to indirectly impact wildlife movement, even if work is conducted during the nesting season. 7.3 Determination of Significance 7.3.1 Direct Permanent Permanent impacts to 48 square feet of non-jurisdictional beach and 49 square feet of coastal sage scrub are not considered significant. Non-jurisdictional beach is not a special-status vegetation community. No special-status species that may potentially occur within this area would be significantly impacted by the loss of 48 square feet of beach. Wildlife movement within the area would not be significantly impacted. As a repair and rehabilitation project for existing infrastructure, the proposed drainage outfall structure would not conflict with the Carlsbad HMP or Agua Hedionda LCP. 7216 DUDEK 49 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams Coastal sage scrub is a special-status vegetation community; however, the loss of 49 square feet would not appreciably reduce the value of coastal sage scrub for special-rstatus species in this area. As a repair and rehabilitation project for existing infrastructure, the project complies with the Carlsbad HMP, which ensures adequate conservation of coastal sage scrub and most associated special-status species that occur within this community. No special-status species that may potentially occur within this area would be significantiy impacted by the loss of 49 square feet of coastal sage scrub. Wildlife movement within the area would not be significantly impacted. The project complies with both the Carlsbad HMP and Agua Hedionda LCP. 7.3.2 Direct Temporary The direct temporary disturbance of 709 square feet at the Hoover/Lagoon site and 400 square feet at the Highland/Adams site is considered significant, absent mitigation. If additional trenching is required at the Hoover/Lagoon site, the additional impacts to disturbed habitat would be considered significant. These areas are located adjacent to Agua Hedionda Lagoon with multiple habitats supporting several special-status species that could be adversely affected by disturbance of these areas. 7.3.3 Indirect Temporary If construction activities occur within the nesting season, impacts to nesting birds from noise and ground vibration will be significant, absent mitigation. Potential fugitive dust, polluted runoff, and litter/trash/debris during construction activities would also be significant, absent mitigation. 8.0 RECOMMENDED AVOIDANCE AND MINIMIZATION MEASURES 8.1 HMP Compliance The proposed project does-not require an HMP permit per Section 21.210.020(A)(4) ofthe City of Carlsbad Code of Ordinances. This section defines a development project in the context ofthe HMP, as the "use of a property, including grading, clearing and gmbbing, constmction, alteration of any magnitude or activities incidental thereto, which requires a discretionary or ministerial permit, entitlement, or approval issued under Titles 15, 18, 20, or 21 of the municipal code." Because no city permits are needed for completion ofthe proposed project, no HMP permit is required. 8.2 Recommended Mitigation Measures Significant direct and indirect temporary impacts to special-status vegetation communities and special-status species can be mitigated; to below a level of significance with implementation of the following measures. 7216 DUDEK 50 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams BIO-l If the construction activities occur during the nesting bird season (February 15 through September 15), the following measures must be taken (per Section 8.1.3, Species-Specific Mitigation, from the Guidelines for Biological Studies (Technology Associates 2008)): • Surveys will also be conducted by a qualified biologist in appropriate habitat for nesting raptors and migratory birds and within an additional 500-foot buffer within three days of construction. • The USFWS will be notified immediately of any federally listed species that are located during preconstruction surveys. • If nests of listed birds, migratory birds, raptors, or other sensitive species are located, no construction activity will occur within 500 feet from active nests of raptors and listed species and 300 feet from other sensitive bird species. • During the breeding season, construction noise will be measured regularly to maintain a threshold at or below 60 dBA hourly Leq within 500 feet of breeding habitat occupied by listed species. If noise levels supersede the threshold, the construction array will be changed or noise attenuation measures will be implemented. BIO-2 A biological monitor shall be present during the construction process in order to review the limits of work and best management practices (BMPs) prior to commencement of construction and to periodically check the compliance of environmental regulations. BIO-3 BMPs will be installed during construction within the temporary disturbance areas to minimize potential adverse effects of construction, including fijgitive dust, polluted runoff, and liter/trash/debris. Potential BMPs may include installation of silt fencing, implementation of dust control measures, and restricting vehicle maintenance to developed roadway areas. Post-constmction BMPs will include reestablishment of preconstmction conditions through reestablishment of preconstruction grade and soil substrate within the non- jurisdictional beach (Hoover/Lagoon site) and application of a hydroseed mix composed of native species within coastal sage scrub (Highland/Adams site). A qualified biologist will review and approve the hydroseed mix prior to application. For the Hoover/Lagoon site, the biologist will confirm reestablishment of preconstmction grades and soil substrate following construction. For the Highland/Adams site, the biologist will conduct quarterly monitoring visits for up to 7216 DUDEK 51 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams 1 year and recommend remedial measures, if necessary, to ensure reestablishment of coastal sage scrub. With implementation of these avoidance and minimization measures, the project will not result in significant impacts to any biological resources. 9.0 REFERENCES ACOE (U.S. Army Corps of Engineers). 1987. Corps of Engineers Wetland Delineation Manual. Online ed. Environmental Laboratory, Wetlands Research Program Technical Report Y- 87-1. Vicksburg, Mississippi: U.S. Army Engineer Waterways Experiment Station. January 1987. Accessed April 9, 2012. http://www.fedcenter.gov/Bookmarks/index.cim?id=6403&pge_id=1606. ACOE. 2008. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Arid West Region (Version 2.0^. Final Version. Environmental Laboratory, ERDC/EL TR-08-28. Vicksburg, Mississippi: U.S. Army Engineer Research and Development Center. September 2008. Accessed April 9, 2012. http://www.usace.army.mi1/Portals/2/docs/civilworks/regulatory/reg_supp/trel08-28.pdf ACOE and EPA (U.S. Environmental Protection Agency). 2008. Clean Water Act Jurisdiction Following the U.S. Supreme Court's Decision in Rapanos v. United States & Carabell v. United States. Guidance originally issued June 2007. Revised December 2, 2008. http://water.epa.gov/lawsregs/guidance/wetlands/upload/2008_12_3_wetlands_CWA_Jur isdiction_FoIlowing_Rapanosl20208.pdf AOU (American Ornithologist's Union). 2012. "Check-List of North American Birds: List of the 2,078 Bird Species Known from the AOU Check-list Area." AOU j Check-List of North American Birds. Accessed April 2012. http://www.aou.org/checklist/north/full.php. Anderson, D. 2011. "Current Carlsbad Tide." Carlsbad, California, USA. Accessed March \27, 2012. http://www.carlsbad.ca.us/tide.htmL California Public Resources Code, Section 30000-30900. California Coastal Act, 1976. CDFG (California Department of Fish and Game). 201 la. "Special Animals (898 taxa)." California Natural Diversity Database. CDFG, Biogeographic Data Branch. January 2011. Accessed April 9, 2012. http://www.dfg.ca.gov/biogeodata/cnddb/plants_and_animals.asp. 7216 DUDEK 52 April 2012 Corrugated Metal Pipe Replacement Program - Hoover/Lagoon and Highland/Adams CDFG. 201 lb. California Natural Diversity Database (CNDDB). California Natural Diversity Database. CDFG, Biogeographic Data Branch. January 2011. Accessed April 9, 2012. http://www.dfg.ca.gov/biogeodata/cnddb/plants_and_animals.asp. CDFG. 2012a. List of California Natural Diversity Database (CNDDB) species for eight quads: Las Pulgas Canyon, Morro Hill, Bonsall, Oceanside, San Luis Rey, San Marcos, Encinitas, and Rancho Santa Fe. CNDDB Quick Viewer. Accessed April 2012. http://imaps.dfg.ca.gov/viewers/cnddb_quickviewer/app.asp. CDFG. 2012b. California Natural Diversity Database (CNDDB). Special. Vascular Plants, Bryophytes, and Lichens List. January 2012. Accessed April 2012. http://www:dfg.ca.gov/biogeodata/cnddb/plants_and_animals.asp. CDFG. 2012c. California Natural Diversity Database (CNDDB). State and Federally Listed Endangered, Threatened, and Rare Plants of Califomia. January 2012. Accessed April 2012. http://www.dfg.ca.gov/biogeodata/cnddb/plants_and_animals.asp. City of Carlsbad. 1982. Agua Hedionda Land Use Plan and Local Coastal Program (LCP). Adopted May 1982. City of Carlsbad. 1999. Habitat Management Plan for Natural Communities in the City of Carlsbad. Finalized in 2004. CNPS (California Native Plant Society). 2010. Inventory of Rare and Endangered Plants. Online ed. Version 7-11). Sacramento, California: CNPS. Accessed November 2010. http://cnps.site.aplus.net/cgi-bin/inv/inventory.cgi. CNPS. 2012. Inventory of Rare and Endangered Plants. Online ed. Version 8-10a. Sacramento, California: CNPS. Quadrangles used in query: Las Pulgas Canyon, Morro Hill, Bonsall, Oceanside, San Luis Rey, San Marcos, Encinitas and Rancho Santa Fe. Accessed April 2012. http://www.rareplants.cnps.org. Emmel, T.C., and J.F. Emmel. 1973. The Butterflies of Southern California. 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Baltimore, Maryland: Johns Hopkins University Press, http://www.bucknell.edu/msw3/ 7216 DUDEK 54 April 2012 APPENDIX A Cumulative List of Plant Species within the Project Area Appendix A Cumulative List of Plant Species within the Project Area VASCULAR SPECIES DIGOTS ASTEJiACEAI^SVmhOWER FAMILY Artemisia californica—coastal sagebmsh Baccharis salicifolia—mule-fat Heterotheca grandiflora—^telegraphweed Isocoma menziesii—^Menzies' goldenbush Pseudognaphalium biolettii - two-color rabbit tobacco BORAGINACEAI^BORAGE FAMILY Cryptantha sp. - cryptantha POX F6'07V^C£L4^BUCKWHEAT FAMILY Eriogonum fasciculatum—Eastem Mojave buckwheat CACTACEAE—CACim FAMILY Opuntia littoralis—coastal pricklypear ^/V^CX^X^CARROT FAMILY *Conium maculatum—poison hemlock CXX(m40L4X^CLEOME FAMILY Carsonia sparsifolia—fewleaf spiderflower ONA GRA CE^X^EVENING PRIMROSE FAMILY Camissonia micrantha—^miniature suncup NYCTAGINACEAI^FOVK O'CLOCK FAMILY Mirabilis laevis—desert wishbone-bush 6'X:i?/4/VZ4CE4^GERANIUM FAMILY *Erodium ^ofry^—longbeak stork's bill *Erodium cicutarium—^redstem stork's bill CHENOPODIACEAE—GOOSF.YOOI: FAMILY * Salsola tragus—prickly Russian thistle Atriplex lentiformis—big saltbush Salicornia virginica—Virginia glasswort Suaeda californica—Califoraia seablite 7216 DUDEK A-1 April 2012 Appendix A Cumulative List of Plant Species within the Project Area PLUMBAGINACEAE^lMAimOKi: FAMILY *Limonium perezii—^Perez's sea lavender FABACEAE—LEGUME FAMILY Acmispon glaber—common deerweed LAMJACEAF^Mim FAMILY Salvia mellifera—black sage BRASSICACEAE>^MmTASD FAMILY *Brassica nigra—black mustard SOLANACEAE^mGWTSHADE FAMILY Datura wrightii—sacred thorn-apple Solanum parishii—Parish's nightshade Solanum xanti—chaparral nightshade OXALWACEA£^OXALlS FAMILY *Oxalis pes-caprae—Bermuda buttercup EUPIfORBIACEAE—STVRGE FAMILY *Ricinus communis—castorbean ANACARDIACEAE^SLMAC OR CASHEW FAMILY Malosma laurina—laurel sumac MONOCOTS POACEAE^GBASS FAMILY *Avena barbata—slender oat *Bromus madritensis ssp. rubens—red brome ^Cortaderia selloana—^Umguayan pampas grass Distichlis spicata—saltgrass AGA VACEAf^AGAVE FAMILY Yucca whipplei—chaparral yucca JUNGACEAI^RVSU FAMILY Juncus acutus spp. leopoldii—southwestem spiny msh * Signifies introduced (non-native) species 7216 DUDEK A-2 April 2012 APPENDIX B Cumulative List of Wildlife Species within the Project Area Appendix B Cumulative List of Wildlife Species within the Project Area WILDLIFE SPECIES BIRDS CO/? raM^-JAYS AND CROWS Corvus brachyrhynchos - American crow TROCHILIDAE-mJMMmGmRDS Calypte anna -Anna's hummingbird PARULIDAE- WOOD WARBLERS AND ALLIES Dendroica coronate - yellow-rumped warbler TROGLOBVTJDAE-WREm Thryomanes bewickii - Bewick's wren FRINGILLIBAE-FmCBES Spinus psaltria - lesser goldfinch ACCIPITRIDAE-MAV^KS Buteo jamaicensis - red-tailed hawk RALLIDAE-RAILS&GALLINVLES Fulica americana - American coot LARWAE-GVLLS AND TERNS Larus occidentalis - western gull ry/24/V7V//M^-FLYCATCHERS Sayornis nigricans - black phoebe CHARABRIIDAE- SHOREBIRDS Charadrius vociferus — killdeer SCOLOPAClDAE-SnOREmRDS Actitis macularius - spotted sandpiper PELECANIDAE- PELICANS Pelecanus erythrorhynchos - American white pelican MAMMALS SCIURJDAE- SQUIRRELS Spermophilus beecheyi - Califomia ground squirrel 7216 DUDEK ,B-1 April 2012 Appendix B Cumulative List of Wildlife Species within the Project Area LEPORIDAE- HARES AND RABBITS Sylvilagus bachmani - bmsh rabbit * Signifies introduced (non-native) species 7216 DUDEK B-2 April 2013 • '