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3821; LAKE CALAVERA REMEDIAL/ MITIGATION PROJECT; BIOLOGICAL RESOURCES REPORT; 2012-01-19
BIOLOGICAL RESOURCES REPORT CALA VERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD SAN DIEGO COUNTY, CALIFORNIA Submitted to Sherri Howard City of Carlsbad 1635 Faraday Avenue' Carlsbad, California 92008-7314 Prepared by LSA Associates, Inc. 703 Palomar Airport Road, Suite 260 Carlsbad, California 92011 (760)931-5471 ' LSA Project No. HCR1 102 LSA. January 2012 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA TABLE OF CONTENTS SUMMARY OF FINDINGS .................................................................... . .............................................. INTRODUCTION............................................................................................................... . ................... I SITE DESCRIPTION AND HISTORY.................................................................................................3 PROJECTPURPOSE .............................................................................................................................. .5 PROPOSEDPROJECT ............................. ............................................................................................. 5 REGULATORY SETTING ...................................................................................................................6 United States Army Corps of Engineers ........................................................................................... 6 Regional Water Quality Control Board ...........................................................................................7 United States Fish and Wildlife Service ...........................................................................................8 California Department of Fish and Game........................................................................................8 NestingBirds ...................................................................................................................................9 Natural Community Conservation Plans ................................................................................. . ........ 9 Habitat Management Plan for Natural Communities in the City of Carlsbad .................................9 SURVEY METHODS AND LIMITS .................................................................................................... 10 Literature Review and Records Search..........................................................................................10 General Reconnaissance Survey and Vegetation Mapping ...........................................................11 RESULTS............................................................................... ....... ... ....................................................12 VegetationMapping ................. ................................................................................................ ...... 12 Inventory of Plants and Wildlife ..................................................................................................... 14 Special-Status Species ....................................................................................................................14 SensitiveHabitat ............................................................................ .. ....... . .... . .............. .. ... ..............19 Jurisdictional Delineation ..............................................................................................................19 Habitat Fragmentation and Wildlife Movement............................................................................20 IMPACTS..................................................................................................... . .... . ................................... 20 TemporaryImpacts........................................................................................................................20 PermanentImpacts ................................................................................................................. . ....... 20 IndirectImpacts .............................................................................................................................20 DirectImpacts ................................................................................. . .............................................. 21 Impacts to Jurisdictional Waters .................................................................................................... 22 Impactsto Wildlife ........................................................................................................................22 MITIGATION........................................................................................................................................ 23 General Mitigation Measures ........... . ............................................................................................... 23 HMPCompliance ..........................................................................................................................24 Special Requirements .................................... ........................................... ....... ...... . .......... . ............. 26 Species-Specific Mitigation Requirements....................................................................................27 HabitatMitigation ............. . ............................................................................................................. 28 Mitigation Requirements for Jurisdictional Resources .................................................................... 29 CONCLUSION....................................................................................................................................29 REFERENCES..................................................................................................................................... 30 P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/1912012) 1 LSA ASSOCIATES,' INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA FIGURES Figure1: Project Location ...................................................................................................................... 2 Figure 2: Habitat Management. Plan Location........................................................................................4 Figure 3: Vegetation Communities Map ......... ....... ............................................................................... 13 TABLES Table A: California Rare Plant Rank Designations ........................ . ....................................................... 11 Table B: Summary of Vegetation Communities within the Project Limits..........................................12 Table C: Special-Status Species with Moderate to High Potential to Occur On Site that May be Affectedby the Project .................................................................................... . ........................... 15 Table D: Impacts to Vegetation Communities .....................................................................................21 Table E: Impacts to CDFG Jurisdictional Waters ................................................................................22 Table F: Proposed Mitigation for Impacts to Vegetation Communities...............................................23 Table G: Mitigation for Impacts to CDFG Jurisdictional Wetlands and Waters ..................................29 APPENDICES SITE PHOTOS CNDDB AND CNPS SPECIES LISTS VASCULAR PLANT SPECIES OBSERVED . WILDLIFE SPECIES OBSERVED SPECIAL-STATUS SPECIES SUMMARY TABLE P:\HCRI 102 - Calavera Darn Routine Maintenance\Bio Report\Final Biological Resources Report.doc (1/19/2012) LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA SUMMARY OF FINDINGS The City of Carlsbad proposes to remove vegetation from the upstream, downstream, spillway, intake/outlet structure, and associated areas at the Calavera Dam, located in the City of Carlsbad, San Diego County, California. The project area is contained within a Hardline Preserve according to the• City of Carlsbad's Habitat Management Plan (HMP), and is listed as a covered project in Appendix B of the HMP. Impacts to approximately 0. 110 acre of southern willow scrub, 0.246. acre of freshwater marsh, 0.040 acre of Diegan coastal sage scrub, 1.289 acres of disturbed areas, and 0.680 acre of bare ground will occur. Additionally, 1.674 acres of areas subject to the jurisdiction by the California Department of Fish and Game (CDFG) have been identified in the project area. The poposed project activities (vegetation clearing) are not regulated by the U.S. Army Corps of Engineers' (Corps) and no impacts (e.g., fill or discharge) related to waters of the U.S. are anticipated. A Lake or Streambed Alteration Agreement, pursuant to California Resources Code Section 1602, will be required for the proposed impacts to vegetation in areas regulated by the CDFG. Several special-status plant and animal species have a moderate to high potential to occur on site due to the presence of suitable habitat within the project area. Compliance with the HMP and the implementation of the following measures would reduce impaôts to biological resources to a less than significant level. Mitigation will be required for the project to be in compliance with the HMP and as a condition of a Streambed Alteration Agreement from the CDFG. INTRODUCTION The proposed project is the removal of vegetation from the upstream, downstream, spillway, intake/ outlet structure and associated areas at the Lake Calavera Dam. The project site is located at the southwestern end of Lake Calavera, off Tai'narack Avenue in the City of Carlsbad, San Diego County, California (see Figure 1). The purpose of the project is to remove vegetation to allow for visual inspection of the dam faces in response to a State of California Division of Safety of Dams (DSOD) field inspection report's recommendations. The City of Carlsbad (City) proposes to perform maintenance activities in the form of vegetation clearing at the Calavera Dam, located in the City of Carlsbad. The DSOD report, dated April, 19, 2010, recommended that the City remove the small trees located near the downstream end of the spillway channel on the top left side; and remove all obscuring vegetation from the upstream and downstream faces of the dam, including the tule (Scirpus sp.) on the upstream face. The report further explained that the "dense tule growth on the upstream face of the dam made it difficult to conduct a thorough visual inspection and provided an inviting area for rodents and burrowing animals. All tule located on the upstream face of the dam should be removed." Under contract with the City, LSA Associates, Inc. (LSA) performed a biological resources analysis of a 3.075-acre project study area, which includes the upstream and downstream faces of the dam, the spillway, and other areas in the vicinity of the dam and lake as depicted in Figure 1. The analysis included a general reconnaissance survey, vegetation mapping, and a formal jurisdictional delineation P:\HCR1102 - Calavera Dam Routine Maintenance\810 Report\,Final_Biological Resources Report.doc (1/1912012) L S A LEGEND FIGURE 1 Project Location 2O Calavera Dam o 1000 Routine Maintenance Project FEET Project Location SOURCE: USGS 7.5'Quad - San Luis Rey (1975), CA R:\HCRI102\GIS\Figl_pmj_Loc.nixd (7/13/2011) LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA to define any areas potentially subject to the jurisdiction of resource agencies. This report presents LSA's conclusions regarding biological resources present within project study area, and its potential to support special-status species. Results of the jurisdictional delineation are summarized in this report. Potential impacts and recommendations are also discussed further in this report. A separate jurisdictional delineation report (on file with the City) provides more detail regarding the regulatory setting, methods, and results of the jurisdictional delineation. This report has been prepared pursuant to the California Environmental Quality Act (CEQA) and addresses the requirements of the Federal Endangered Species Act (FESA) of 1973, the Federal Clean Water Act (CWA), the California Fish and Game Code, the California Endangered Species Act (CESA), and the City HMP for Natural Communities in the City of Carlsbad. This report has been prepared for use by the City of Carlsbad, the CDFG, and the United States Fish and Wildlife Service (USFWS) as part of their reviews of applications for permit authorization, as necessary. All biological surveys referenced in this report were conducted under contract to the City by LSA. The findings and conclusions presented in this report represent the professional opinion of LSA. These findings and conclusions should be considered preliminary until verified by the appropriate regulatory agencies. SITE DESCRIPTION AND HISTORY The project site is located at the southwestern end of Calavera Lake, off Tamarack Avenue in the City of Carlsbad, San Diego County, California, on the United States Geological Survey (USGS) San Luis Rey, California 7.5-minute topographical quadrangle map (see Figure 1). Specifically, the project is located in an unsectioned portion of the Agua Hedionda Land Grant. The project study area is located on moderately steep slopes on City-owned property. The surrounding area consists of undeveloped open space to the north, south, and west; and open water associated with the reservoir to the east. The site is further surrounded by residential development to the west. The project is contained within a Hardline Preserve according to the HMP (Figure 2). The Calavera Lake Reservoir was formed by the compacted earth-fill .dam containing rock blankets on both upstream and downstream faces. The decomposed granite base was excavated and the dam and spillway structures were completed in 1941. The primary function of the Calavera Lake Reservoir is stormwater retention for flood control. The surface area of the reservoir, when full, is approximately 21 acres. Its maximum storage capacity is approximately 540 acre-feet. The average depth of the reservoir is between 12 to 16 feet and has a maximum water depth of 54 feet. The dam has a height of 67 feet from top of dam to the oUtfall structure. The parcel encompassing the Calavera Lake Reservoir is owned by the City, and the Carlsbad Municipal Water District (CMWD) operates and maintains the dam. In 2006, CMWD initiated the Calavera Dam Remedial Improvements Project, which was completed in 2Q09, to repair the badly neglected dam and appurtenances to comply with DSOD requirements. That project included repairs to the existing Lake Calavera Reservoir intake/outlet works, to the spillway and access road, to the existing outlet piping using slip-lining methods, and Construction of a control building and fencing for improved site security around the dam operations. Vegetation was removed at that time, but has since grown back. Pursuant to DSOD directives, the vegetation on the dam and in the spillway should be removed annually, so it will not reestablish. P:\1-ICRI 102- Calavera Dam Routine Maintenance\Bio Report\rinal_Biological Resources Report.doc (1119t2012) L.5 A LEGEND 11UUKL2 Project Location 4 Local Facilities Management Zones () [J Existing Hardline Conservation Areas 0 3100 6200 FEET SOURCE: City of Carlsbad (2011) R:'JICRI 102\GIS\HMP_Location.mxd (7113/2011) Proposed Hardline Conservation Areas [J Outside-Conserved [J Standards Area Calavera Dam Routine Maintenance Project Habitat Management Plan Location LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Responsibility for supervision of dams and reservoirs is assigned to the Department of Water Resources (DWR) and delegated to the DSOD. Water Code Sections 6000 to 6004.5 and. 6025.5 identify dams and reservoirs that are under State jurisdiction. In matters relating to CEQA, the DWR is typically the lead or responsible agency for dams and reservoirs. According to the current practices of the DSOD (published on its website at http://www.water.ca.gov/damsafety/docs/ CurrentPractices.pdf, viewed May 6, 2011) repair and maintenance qualify for an exemption under CEQA. However, because the repair activities involve the removal of regulated habitat, the City (the CEQA lead agency and the project proponent) will require an Initial Study. The DSOD will be a responsible agency under CEQA. PROJECT PURPOSE The purpose of the proposed project is to respond to a recommendation from the DSOD in a field inspection report dated April, 19, 2010, that the following actions be taken: Remove the small trees lOcated near the downstream end of the spillway channel on the top left side; and Remove all obscuring vegetation from the upstream and downstream faces of the dam, including the tules on the upstream face. The DSOD field inspection report further explained that the "dense tule growth on the upstream face of the dam made it difficult to conduct a thorough visual inspection and provided an inviting area for rodents and burrowing animals. All tules located on the upstream face of the dam should be removed." PROPOSED PROJECT The project entails removal of vegetative material, from the north (lakeside or upstream side) and south (downstream side) faces of the dam, spillway, and outlet structure in response to the DSOD order. Appendix A depicts these areas. The proposed project includes current vegetation removal (2011), and ongoing, routine vegetation removal. The vegetation in the immediate and surrounding vicinity is dominated by Diegan Coastal Sage Scrub, Disturbed Land, Coastal and Valley Freshwater Marsh, Nonnative Grassland, Non-native Vegetation, Southern Willow Scrub, Mule Fat Scrub, Coast Live Oak, Riparian Forest, and Open Water. The total area subject to routine vegetation removal maintenance includes approximately 3 acres, 2.8 acres of which has been maintained in the past. Vegetation (including some riparian habitat) would be removed using any or all of the following methods: manual removal, application of herbicide, and mechanically (using a Gradall excavator [or equivalent] from the top of the dam). All mechanical equipment and trucks used during maintenance activities would be staged in paved or developed areas on the top of the dam or on the access road where the substrate is either bare ground or paved N ground disturbance (i.e., grubbing or grading) is proposed as part of the project. Initial maintenance would include removal of some trees and shrubs as well as low-growing vegetation. The City will conduct initial vegetation removal maintenance outside of nesting bird season (i.e., outside of February 15 through September 15). Installation of temporary exclusionary fencing would ensure that the limits of construction are clearly defined prior to brush-clearing activities and clearly visible to personnel on foot and equipment operators. Construction personnel shall strictly limit their activities and vehicles to the proposed project P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Bi9logical Resources Report doe (1/19t2012) LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA construction areas, approved staging areas, and routes of travel. The lake level would be lowered by approximately 3 feet in order for submerged vegetation to be removed. No permits or permissions are required from the DSOD for the CMWD to perform maintenance (including lowering and raising lake levels as required for maintenance activities). The removed vegetative materials would be mulched in a chipper and hauled away in trucks to an approved disposal facility. It is estimated that approximately 5 truckloads would be necessary. Vegetation removal maintenance activities will occur in perpetuity, routinely for a period of approximately 10 days per year. Maintenance events will occur Outside of nesting bird season as needed, and depending on rate of vegetation growth, will take 1 to 3 days. The City is the CEQA Lead Agency. Permits will be required frOm the CDFG for impacts to riparian habitat (pursuant to the Lake and Streambed Alteration Program) and from the City pursuant to the City's Adopted HMP.' The CDFG and CMWD will also be responsible agencies under CEQA. REGULATORY SETTING United States Army. Corps of Engineers Pursuant to Section 404 of the CWA, the Corps regulates discharges of dredged or fill material into waters of the United States. These waters include wetlands and nonwetland bodies of water that meet specific criteria, as outlined in the guidelines provided in the Corps 1987 Manual and founded on a connection, or nexus, between the water body in question and interstate commerce. The following definition of waters of the United States is taken from the discussion provided at 33 CFR328.3: "The term waters of the United States means: All waters which are currently used, or were used in the past, or may be susceptible to use in interstate or foreign commerce...; All interstate, waters including interstate wetlands; All other waters such as intrastate lakes, rivers, streams (including intermittent streams) ... the use, degradation or destruction of which could affect interstate or foreign commerce...; . All impoundments of waters otherwise defined as waters of the United States under the definition; and Tributaries of waters defined in paragraphs (a) (1)—(4) of this section." The Corps and Environmental Protection Agency (EPA) define wetlands as follows: "Those areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that, under normal circumstances do support, a prevalence of vegetation typically adapted to life, in saturated soil conditions." City of Carlsbad. 2004. Habitat Management Plan for Natural Communities in the City of Carlsbad. December 1999, as amended. Final Approval November 2004. P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio ReporAFinal_Biological Resources Report.doc (I/19t2012) LSA ASSOCIATES, INC. - BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA In order to be considered a jurisdictional wetland under Section 404, an area must possess three Wetland characteristics: hydrophytic vegetation, hydric soils, and wetland hydrology. Each characteristic has a specific set of mandatory criteria. In 2006, the United States Supreme Court further considered the Corps jurisdiction of "waters of the United States" in the consolidated cases Rapanos v. United States and Carabell v. United States (126 S. Ct. 2208), collectively referred to as Rapanos. The Supreme Court concluded that wetlands are "waters of the United States" if they significantly affect the chemical, physical, and biological integrity of other covered waters more readily understood as navigable. On June 5, 2007, the Corps issued guidance regarding the Rapanos decision. This guidance states that the Corps will continue to assert jurisdiction over traditional navigable waters, wetlands adjacent to traditional navigable waters, relatively permanent nonnavigable tributaries that have a continuous flow at least seasonally (typically three months), and wetlands that directly abut relatively permanent tributaries. The Corps also will determine jurisdiction over waters that are not relatively permanent, nonnavigable tributaries, and over wetlands adjacent to nonnavigable tributaries that are not relatively permanent only after making a significant nexus finding. Furthermore, the preamble to Corps regulations (Preamble Section 328.3, Definitions) states that the Corps does not generally consider the following waters to be waters of the United States. However, the Corps reserves the right to regulate these waters on a case-by-case basis: Nontidal drainage and irrigation ditches excavated on dry land; Artificially irrigated areas that would revert to upland if the irrigation ceased; Artificial lakes or ponds created by excavating and/or diking dry land to collect and retain water and used exclusively for such purposes as stock watering, irrigation, settling basins, or rice growing; Artificial reflecting or swimming pools or other small ornamental bodies of water created by excavating and/or diking dry land to retain water for primarily aesthetic reasons; and Water-filled depressions created on dry land incidental to construction activity and pits excavated on dry land for purposes of obtaining fill, sand, or gravel unless and until the construction or excavation operation is abandoned and the resulting body of water meets the definition of waters of the United States. Often, waters found to be isolated and not subject to CWA regulation still are regulated by the Regional Water Quality Control Board (RWQCB) under the State Porter-Cologne Water Quality Control Act (Porter-Cologne Act). Regional Water Quality Control Board The RWQCB has regulatory authority over waters of the United States pursuant to CWA Section 401 and waters of the State pursuant to Porter-Cologne. The Corps cannot issue authorization for fill or discharge into waters of the United States without a Certification or waiver of Water Quality from the RWQCB. Additionally, isolated nonnavigable waters and wetlands excluded from Corps jurisdiction' are subject to RWQCB authority as waters of the State, and any discharge of waste (RWQCB P:\HCRI 102- Calavera Dam Routine Maintenance'Bio Report\Final_Biological Resources Report.doc (1/I9t20I2) 7 LSA ASSOCIATES, INC. BIOLOCICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA considers fill to be waste) may require a Report of Waste Discharge and may be subject to Waste Discharge Requirements by the RWQCB, pursuant to Porter-Cologne. The RWQCB can require mitigation measures beyond those required by the Corps or CDFG. United States Fish and Wildlife Service The FESA sets forth a two-tiered classification scheme based on the biological health of a species. Endangered species are those in danger of becoming extinct throughout all or a significant portion of their range. Threatened species are those likely to become endangered in the near future; Special Rules under Section 4(d) can be made to address threatened species. Ultimately, the FESA attempts to bring populations of listed species to healthy levels so that they no longer need special protection. Section 9 of the FESAprohibitsthe "take" of listed species by anyone unless authorized by the USFWS. "Take" is defined as "conduct which attempts orresults in the killing, harming, or harassing of a listed species." "Harm" is defined as "significant habitat modification or degradation where it actually kills or injures wildlife by significantly impairing essential behavior patterns, including breeding, feeding, or sheltering." "Harass" is defined as an "intentional or negligent act or omission which creates the likelihood of injury to wildlife by annoying it to such an extent as to significantly disrupt normal behavioral patterns, including breeding, feeding, or sheltering." Therefore, in order to comply with the FESA, any proposed project should be assessed prior to construction to determine whether the project will impact listed species or, in the case of a federal action on the project, designated critical habitats. If no federal action is associated with the proposed project, and the project will result in take of listed species, authorization from the USFWS in the form of a Section 10(a) take permit and an accompanying HCP. is required. If a federal action exists and the project may affect listed species or designated critical habitat, then pursuant to Section 7 of the FESA, consultation with the USFWS is required. That consultation can result in an incidental take authorization through a Biological Opinion. California Department of Fish and Game Section 1602 of the California Fish and Game Code empowers the CDFG to issue agreements for any alteration of a river, stream, or lake where fish or wildlife resources may be adversely affected. Streams (and rivers) are defined by the presence of a channel bed and banks and at least an intermittent flow of water. The CDFG regulates wetland areas only to the extent that those wetlands are part of a river, stream, or lake as defined by the CDFG. While seasonal ponds may be subject to CDFG jurisdiction, if they are not associated with a river, stream, or lake; they are not subject to CDFG jurisdiction under Section 1602 of the Fish and Game Code. The CESA State Fish and Game Code (Sections 2050-2098) was signed into law in 1984. Intended to parallel the federal law, the CESA prohibits the Unauthorized "take" of species listed as threatened or endangered under its provisions. However, a significant difference exists in the CESA definition of "take," which is limited to actually or attempting to "hunt, pursue, capture, or kill." CESA provisions. for authorization of incidental take include consultation with a state agency, board, or commission P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Bio!ogical Resources Report doc (1/19/2012) LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA that is also a State Lead Agency pursuant to CEQA; authorization of other entities through a Section 2081 permit; or adoption of a federal incidental take authorization pursuant to Section 2081.1. Similar to the federal act, actions in compliance with the measures specified in the consultation process or Section 2081 permit are not prohibited. Nesting Birds The Migratory Bird Treaty Act (MBTA) regulations and portions of the California Fish and Game Code prohibit the "take" of nearly all native bird species and their nests. While these laws and regulations originally were intended to control the intentional take of birds and/or their eggs and nests by collectors, falconers, etc., they can be applied to unintentional take (e.g., destroying an active nest by cutting down a tree). It is sometimes possible to obtain a permit for relocating or removing a nest. City of Carlsbad Zoning Ordinance 21.210.040 prohibits clearing or grubbing of vegetation during wildlife breeding seasons. This includes birds and raptors. According to this ordinance, all construction activities are prohibited within 300 feet of an active nest or territory of a listed species. Natural Community Conservation Plans In an effort to respond to growing concern over the conservation of coastal sage scrub and other special-status biological communities, federal, state, and local agencies have developed a multispecies approach to habitat conservation planning known as the Natural Communities Conservation Planning process. This was made possible by legislation (Assembly Bill 2172) that authorized the CDFG to enter into agreements for the preparation and implementation of Natural Communities Conservation Plans (NCCPs). The USFWS joined in this effort, utilizing both the Section 4(d) Special Rule and the Habitat Conservation Plan (HCP) processes. The goal of the Natural Communities Conservation Planning program is to identify significantly important coastal sage scrub habitat and to develop ways and means to preserve and/or restore the ecological value of this and associated plant communities and their attendant special-status species in a rapidly urbanizing setting. The North County Multiple-Habitat Conservation Program (MHCP) is a subregional Natural Communities Conservation Planning effort encompassing the land of seven member cities (Carlsbad, Encinitas, Escondido, Oceanside, San Marcos, Solana Beach, and Vista). The MHCP was developed by a cooperative effort among the seven member cities and the San Diego Association of Governments (SANDAG). The HMP is an important component to the future adoption of the MHCP that is specific to the City. Habitat Management Plan for Natural Communities in the City of Carlsbad The City HMP is a citywide, comprehensive program that provides for coordination with the resource agencies to preserve and protect special-status biological resources and habitats while allowing for development within the City consistent with the General Plan and Growth Management Plan. The HMP provides for the take of special-status species incidental to the implementation of private and public projects consistent with the HMP. These permits are issued under the FESA, the CESA, and P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/1912012) LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA the California Natural Community Conservation Planning Act. The City's Growth Management Plan divided the City into 25 Local Facilities Management Zones (LFMZ) for-planning purposes. The project site is located within LFMZ 7. The HMP identifies areas of high value biological habitat in its Focused Planning Area (FPA) Map. These FPAs include cores and linkages that provide large blocks of habitat and corridors for wildlife movement (depicted in Figure 4 in the HMP). The project is located within Core 3 (see Figure 2). The project area is also located within an Existing Hardline Preserve Area, as shown in Figure 2. No part of the project site is located within any Standards Areas, Proposed Hardline Areas; or Exempted Areas. The HMP includes goals and policies as guidelines for development and conse rvation efforts within the City. The HMP assigns values and mitigation ratios for habitat groups and, types that occur within the City. Development located within an Existing Hardline Preserve Area is prohibited; however, exceptions may be processed as minor or major amendments. A minor amendment includes minor adjustments to hardline boundaries that result in no net loss of the quality or quantity of habitat. Major amendments are required if lands are removed from conserved afeas or if a hardline boundary adjustment results in a net loss of habitat or reduction in habitat quality' (City of Carlsbad 2008). However, Appendix B of the HMP lists City projects that are covered by the City Land Mitigation Bank (Lake Calavera mitigation parcel). As discussed in the HMP, the Core 3 FPA (approximately 1,164 acres, depicted in Figure 4 of the HMP) contains large areas of coastal sage scrub that support critical populations of coastal California gnatcatcher (Polioptila ca1fornica calfornica) and thread-leaved brodiaea (Brodiaeafilfolia). Major stands of chaparral and grassland are also present. The northern portion of Core 3 contains open water, freshwater marsh, and riparian scrub habitats that are associated with Lake Calavera (as illustrated in Figure 19 of the HMP). Oak woodland, riparian forest, and riparian scrub occur in the southern section of this Core Core 3 has linkages to Core 2 (Linkage Area A; see above), Core 4 (Linkage Area B), and Core 5 (Linkage Area Q. The project site is not located within a Linkage Area. SURVEY METHODS AND LIMITS Literature Review and Records Search Prior to conducting fieldwork, LSA biologists conducted a literature review, and database records search on May 17, 2011, to identify the existence or potential occurrence of special-status plant and animal species in or within the vicinity of the project study area. Refer to Appendix B for literature review and database records search documentation. LSA reviewed the City's HMP and Guidelines for Biological Studies (City of Carlsbad 1998, Prepared by Technology Associates [TAlC]). LSA conducted record searches in the California Natural Diversity Data Base (CNDDB) and California Native Plant Society's (CNPS) electronic databases for species expected to occur within the vicinity of the project study area. Current electronic database records reviewed by LSA included the following: P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc(l/I9120I2) 10 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Annual report results of foáused surveys at Lake Calavera through the Center for Natural Lands Management (CNLM), the Lake Calavera Mitigation Preserve Manager. CNDDB information (i.e., RareFind 3.1.0), administered by the CDFG. This database covers lists of special-status animal and plant species, as well as sensitive natural communities that occur within California. CNPS Electronic Inventory of Rare and Endangered Vascular Plants of California (Skinner and Pavlik 1994), which identifies four specific designations or ranks identified by the California Rare Plant Rank (CRPR) of special-status plant species and summarizes regulations that provide for the conservation of special-status plants (see Table A). The following quote is excerpted from the CDFG California Natural Diversity Database Special Vascular Plants, Bryophytes, and Lichens List (April 2011): "Taxa which meet the criteria for listing, even if not currently included on any list, as described in Section 15380 of the California Environmental Quality Act (CEQA) Guidelines; these taxa may indicate "None" under iisting.status, but note that all CNPS List 1 and 2 and some List 3 and 4 (now known as California Rare Plant Ranks 1A, 1B, 2, 3, and 4) plants may fall under Section 15380 of CEQA." Table A: California Rare Plant Rank Designations Rank Classification 1A Presumed extinct in California 113 Rare or endangered in California and elsewhere 2 Rare or endangered in California, more common elsewhere 3 Need more information 4 Plants of limited distribution General Reconnaissance Survey and Vegetation Mapping Field maps of the areas to be surveyed were prepared, including a 2010 aerial photograph base overlaid with preliminary project boundaries provided by the City at a scale of 1 inch = 50 feet. LSA Biologists Jaime Morales and Dan Rosie conducted a general reconnaissance survey of the site on May 18, 2011, to generally assess the existing habitat, identify potentially suitable habitat for special- status species, and determine whether focused surveys for special-status species are warranted. Vegetation communities on site were recorded on a field map and digitized using Geographic Information Systems (GIS) software. These communities were classified according to the HIVIP vegetation descriptions. All species observed during the reconnaissance survey were recorded (Appendices C and D). Species-specific focused surveys were not conducted during the general reconnaissance survey; however, there is suitable habitat on site to support special-status species (discussed further in Appendix E). The results of a general reconnaissance survey are discussed further below. P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biotogical Resources Report.doc (l/19t2012) 11 LSA ASSOCIATES, INC. - BIOLOGICAL RESOURCES REPORT JANUARY 2011 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA RESULTS Vegetation Mapping Seven vegetation communities and/or land uses were identified and recorded within the project study area using the HMP vegetation classifications. Table B provides the acreage of each community iii the project study area. The vegetation communities are described in further detail below and are illustrated in Figure 3. Table B: Summary of Vegetation Communities within the Project Limits Vegetation Community - Area (acres) Southern Willow Scrub 0.110 Freshwater Marsh 0.246 Diegan Coastal Sage Scrub 0.040 Open Water 0.011 Disturbed Areas P289 Bare Ground 0.680 Developed 0.699 Total Project Study Area' 3.075 .,t Total may not equal sum due to rounding. Southern Willow Scrub. Southern willow scrub vegetation occurs near the lake edge at the spillway, upslope and adjacent to freshwater marsh vegetation that lines the lake edge; This vegetation type primarily consists of mature individuals of arroyo willow (Salix lasiolepis), black willow (Salix exigua), and mule fat (Baccharis salicfolia), with an understory dominated by salt grass (Distichlis spicata), tall flatsedge (Cyperus eragrostis), and western ragweed (Ambrosia psilostachya). Freshwater Marsh. Freshwater marsh primarily occurs along the upstream face of the dam and along the lake edge at the spillway. Additionally, a small patch of this vegetation community occurs around the outlet structure located at the bottom of the downstream face of the dam. Freshwater marsh within the project study area consists of monotypic stands of California bulrush (Schoenoplectus calfornicus). Diegan Coastal Sage Scrub. One large patch and multiple small patches of Diegan coastal sage scrub occur along the upper terraces associated with the western and eastern banks of the spillway, primarily at the southern end of the study area. This community is primarily composed of laurel sumac (Malosma laurina), lemonadeberry (Rhus integrfolia), coyote brush (Baccharis pilularis), deer weed (Lotus scoparius), white sage (Salvia apiana), chaparral mallow (Malacothamnus - fasciculatus), golden yarrow (Eriophyllum confertflorum), California everlasting (Gnaphalium calfornicum), California buckwheat (Eriogonum fasciculatum) , black sage (Sa1-4a mell?fera), California sagebrush (Artemisia cal4fornica), and coastal goldenbush (Isocoma menziesii var. vernonioides). P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19t2012) - 12 SoilTvpes Friant rocky fine sandy loam (9 to 30 percent slopes) Fiiant rocky fine sandy loam (30 to 70 percent slopes) . Las Posas stony fine sandy loam (30 to 65 percent slopes) Water am elk ut _ ' : i. T:i I it L S A LEGEND FIGURE 3 F-1 StudyArea t: Disturbed (1.289 ac) 4 Vegetation Communities Freshwater Marsh (0.246 ac) Bare Ground (0.680 ac) J Open Water (0.011 ac) T [] Diegan Coastal Sage Scrub (0.040 ac) [J Southern Willow Scrub (0.110 ac) Calavera Dam 0 45 9° 1 Developed (0.699 ac) Routine Maintenance Project FEET Vegetation and Soils SOURCE: Aerial - City of Carlsbad (20 10) R:\HCRlJ02kGlS\Vegctation.mxd (7/19/2011) LSA ASSOCIATES,.INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT - - CITY OF CARLSBAD, CALIFORNIA Open Water. Open water within the project study area only occurs within a small area along the lake edge at the spillway and within a small area immediately surrounding the dam outlet structure (only during times when water is released). These areas are devoid of vegetation. Disturbed Areas. This designation applies to areas that have been frequently and repeatedly disturbed by human activities and have since been colonized by non-native vegetation, primarily along the upstream and downstream faces of the dam, surrounding the southern and eastern end of the control building, and adjacent to the spillway. The majority of the project study area consists of this vegetation type dominated by various combinations of the following species: short-pod mustard (Hirschfeldia incana), tocalote (Centaurea melitensis), rat-tail fescue ( Vulpia myuros), red brome (Bromus rubens), sourclover (Melilotus indica), red-stem filaree (Erodium cicutarium), prickly sow- thistle (Sonchus asper), bristly ox-tongue (Picris echioides), Crete weed (Hedypnois cretica), Italian thistle (Carduus pycnocephalus), soft chess (Bromus hordeaceous), and fennel (Foeniculum vulgare). Bare Ground. Within the project study area, the bare ground designation. applies to undeveloped, unvegetated ground, including the unpaved access road associated with the dam, the eastern portion of the spillway (lake side), and the primary drainage downstream of the spillway. Developed. This designation applies to areas that consist of development, such as the fenced building and the concrete section of the spillway on the western side of the project study area, and a portion of the paved driveway at the northwestern corner of the project study area. Inventory of Plants and Wildlife Lists of observed vascular plants and wildlife species can be found in Appendices C and D, respectively. Observed plants included many non-native species as well as components of coastal sage scrub, southern willow scrub, and freshwater marsh. Wildlife observed in the project study area consisted of species commonly found in the vegetation communities described above. Special-Status Species Special-status species include "listed species," which are termed threatened, endangered, or candidate by the USFWS or CDFG, as well as "nonlisted species." Nonlisted special-status species include California Species of Concern (CSC) and California Fully Protected (CFP) species, as designated by the CDFG, as well as plant species in the HMP, and CRPR 1 and 2, which include species that are rare or endangered in California. The CDFG maintains additional information for species with the designation of "Special Animal" (SA) and "Special Plant" (SP). This designation does not afford specific protection for the species and is not an indicator of rarity of the species. Additionally, the CRPR maintains Rank 3 (species about which more information is needed) and Rank 4 (a watch list). These lists also do not afford any specific protection or status to the species. These species are not considered special-status species, but known and probable occurrences of SA species and observations of CRPR Rank 3 and Rank 4 species P:\HCR1 102 - Calavera Dam Routine Maintenance\Bio ReporAFinal_Biological Resources Report.doc (1/19/2012) - 14 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA are documented in this report for purposes of full disclosure under CEQA. For a complete list of the special-status species that were considered, including those with a low potential to occur, refer to Appendix E. They are addressed in this particular analysis based on the habitat types present in the immediate project study area. Each special-status species with the potential to be present in the project vicinity and project site is discussed. The potential for special-status species to occur within the project site was ranked as absent, low, moderate, high, or present. The occurrence potential was determined using the following criteria: . . . Absent This ranking refers to plant species that are perennial., obvious, and were not observed on the project site; and animal species that would not occur within the habitat on site. Low Existing populations are not known to occur near the site, and any potential habitat is of marginal quality; or the species is known to occur near the site but suitable habitat is not present on site. This category also applies to bird species that migrate through the project site, but would not be present during the nesting season (or for which no suitable nesting habitat is present), and for species with moderate potential to occur but were not detected during focused surveys. Moderate The species is not known to occur near the site, but suitable habitat is present within or near the project site. High The species is known to occur near the site, and suitable habitat occurs within the project site. . . Present The species is reported by natural resource agencies as present within the project site, and suitable habitat is found to occur within the project site, or the species was observed during the survey. The designation "Foraging Birds Present' indicates species that were observed on the site, but are not expected to nest on the site. No special-status species were observed in or near the project study area. Table C lists the special-status plant and wildlife species with a moderate to high potential to occur on site that may be affected by the project (refer to Appendix E for status information for each species). The table also provides the listing status, HMP coverage, and whether or not the species is an HMP No-Take species or a narrow endemic species. Table C: Special-Status Species with Moderate to High Potential to Occur On Site that May be Affected by the Project Federal and State Listing Covered by HMP No Common Name Scientific Name Status HMP' Take Species' NE Plants mud nama Nama stenocarpum US: - CA: SP CRPR4:2 P:\HCR1102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/1912012) .15 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Table C: Special-Status Species with Moderate to High Potential to Occur On Site that May be Affected by the Project Federal and State Listing Covered by HMP No Common Name Scientific Name Status HMP' Take Species2 NE Robinson's pepper- Lepidium virginicum US: - grass var. robinsonii CA: SP CRPR:1B Reptiles Blainville's horned Phrynosoma blainvillii US: - lizard CA: SSC coast patch-nosed snake Salvadora he.xalepis US:— . virgultea CA: SSC - coastal whiptail Aspidoscelis tigris US: - stejnegeri CA: SSC Coronado Island skink Plestiodon US: - skilonianus CA: SSC interparietalis orange-throated Aspidoscelis US: - whiptail hyperythra CA: SSC red-diamond rattlesnake Crotalus ruber . US: CA: SSC rosy boa Chirina trivirgata US: - CA: SA San Diego ringneck Diadop his punctatus US: - snake similis CA: SA . two-striped garter snake Thamnophis US: - hammondii CA: SSC Birds burrowing owl Athehe cunicularia US: BCC (burrowing sites) CA: SSC Clark's mafsh wren Cistothorus palustris US: - clarkae CA: SSC coastal California Polioptila calfornica US: FT gnatcatcher caljfornica CA: SSC Cooper's hawk Accipiter cooperii US: - CA: SA least Bell's vireo Vireo belliipusillus US: FE F CA: SE Southern California Aimophila ruficeps US: - rufous-crowned canescens CA: SA X sparrow yellow-breasted chat Jcteria virens US: - (nesting) CA: SSC I P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19t2012) 16 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Table C: Special-Status Species with Moderate to High Potential to Occur On Site that May be Affected by the Project - Federal and - State Listing Covered by HMP No Common Name Scientific Name Status HMP' Take Species2 NE' yellow warbler Dendroica petechia US: - (nesting) brewsteri CA: SSC Mammals Duizura pocket mouse Chaetodipus US: - calfornicusfemora1is CA: SSC northwestern San Diego Chaetodipusfallax ' US: - pocket mouse fallax CA: SSC San Diego desert Neotoma lepida US: - woodrat intermedia CA: SSC western red bat Lasiurus blossevillii US: - CA: SSC Habitat Management Plan. HM]' No Take Species include those for which "take" (harm, harass, or kill) has not been authorized. The U.S. Fish and Wildlife Service (USFWS) take permit conditions state that take has not been authorized for the western snowy plover, the elegant tern, Fully Protected Species, or Species from HMP Table 2, List 2 and List 3. NE: Narrow Endemic Species. Narrow endemic Species (1) have restricted geographic distribution, soil affinities, and/or habitats, (2) occur in the City, and (3) the substantial loss of which might jeopardize the long-term survival of the species. California Rare Plant Ranking Species Covered By the HMP. Seven of the species listed in Table C are covered by the HMP: orange-throated whiptail (Aspidoscelis hyperythra), burrowing owl (Athene cunicularia), coastal California gnatcatcher, Cooper's hawk (Accipiter cooperii), least Bell's vireo (Vireo belliipusillus), Southern California rufous-crowned sparrow (Aimophila ruficeps canescens), and yellow-breasted chat (Icteria virens). The City has been granted authorization to issue Incidental Take Permits for impacts to these species. Species-specific HMP permit conditions are listed in HMP Table 9, Section D and HMP Section D.6 and discussed further below under Impacts and Recommendations. Personal communication with City Staff and the Calavera Mitigation Preserve Manager; Center for Natural Lands Management, Markus Speigelburg (via email July 20, 2011) indicates that burrowing owl sign and individuals have not been observed in the project area during regular surveys conduced by CNLM as part of preserve management. Coastal California gnatcatchers are known to occupy coastal sage scrub in the vicinity of the project area (CNLM 2011) and the project considers habitat on site to be occupied pursuant to the HMP. No-Take Species Under the HMP. No-take species are those for which "take" (harm, harass, or kill) has not been authorized under the HMP. The USFWS take permit conditions state that take has not been authorized for western snowy plover (Charadrius alexandrinus nivosus), elegant tern (Sterna elegans), Fully Protected Species, or species from HMP Table 2, List 2 and List 3. No-Take species are not expected to be affected by project activities. P:\HCR 1102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) 17 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA Narrow Endemic Species. Narrow endemic species are native species with restricted geographic distributions, soil affinities and/or habitats, and for purposes of the HMP, species that in addition have important populations or their habitat is within the plan area, such that substantial loss of these populations or habitat within the HMP area might jeopardize the continued existence or recovery of that species. No narrow endemic species are expected to be affected by the project. Special-Status Species Not Covered by the HMP. No federally- or state-listed as threatened or endangered species that are not covered by the HMP are expected to be affected by the project. Some species are designated as Fully Protected Species by the California Fish and Game Code and no provision of any other law can be construd to authorize take of those species. The project is not anticipated to affect any. Fully Protected Species. As indicated in Table C, the following species are considered special-status species not covered by the City's HMP with a moderate to high potential to occur on site: mud nama (Nama stenocarpum), Robinson's peppergrass (Lepidium virginicum var. robinsonii), Blainville's homed lizard (Phrynosoma blainvillei), coast patch-nosed snake (Salvadora hexalepis virgultea), coastal whiptail (Aspidoscelis tigris stejnegeri), Coronado Island skink (Plestiodon ski itonianus skiltonianus), red- diamond rattlesnake (Crotalus ruber), rosy boa (Lichanura trivirgata), San Diego ringneck snake (Diadophispunctatus similis), two-striped garter snake (Thamnophis hammondii), Clark's marsh wren (Gist otho rus palustris clarkae), yellow warbler (Dendroica petechia), Duizura pocket mouse (Chaeotodipus calfornicusfemoralis), northwestern San Diego pocket mouse (Chaetodipusfallax fallax), San Diego desert woodrat (Neotoma lepida intermedia), and western red bat (Lasiurus blossevillii). These species do not require additional mitigation above and beyond that required for covered species (e.g., habitat compensation and avoidance of breeding season/maternal season). Mud nama and Robinson's peppergrass were not observed during the general reconnaissance survey. Both are annual herbs with an activity period of between January and July. Indirect impacts to these species could occur due to loss of suitable habitat. Blainville's horned lizard, coast patch-nosed snake, coastal whiptail, Coronado Island skink, red- diamond rattlesnake, rosy boa, San Diego ringneck snake, and two-striped garter snake were not observed during the general reconnaissance survey. Since these species are highly capable of dispersing, no direct impactsto these species are anticipated. Indirect impacts to these species could occur due to project-related disturbance and loss of suitable habitat. Clark's marsh wren and yellow warbler were not observed during the general reconnaissance survey. Since project activities will be conducted outside of the bird breeding season, no direct impacts to these species are anticipated. Indirect impacts to these species could occur due to project-related disturbance and loss of suitable habitat. Dulzura pocket mouse, northwestern San Diego pocket mouse, San Diego desert woodrat, and western red bat were not observed during the general reconnaissance survey. Since these species are highly capable of dispersal, and since project activities will occur outside of the western red bat maternal season (late May through September), which coincides with the bird breeding season, no P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) . 18 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA direct impacts to these species are anticipated. Indirect impacts to these species could occur due to project-related disturbance and loss of suitable habitat. Sensitive Habitat Per the City's HMP, the following habitats are considered sensitive: southern willow scrub, freshwater marsh, and Diegan coastal sage scrub. Southern willow scrub and freshwater marsh are considered sensitive under federal and state regulations and policies. Diegan coastal sage scrub is considered a sensitive habitat under California regulations and polices, and, according to the HMP, is given the highest priority in the CNDDB. Jurisdictional Delineation Calavera Lake, a dammed section of an unnamed, intermittent stream course, which is a direct tributary to the Pacific Ocean (a Traditional Navigable Water [TNW] of the U.S.), and associated ephemeral tributaries to this stream course are located within the study area. Because of the direct connection with Agua Hedionda and the Pacific Ocean, these features are subject to Corps jurisdiction to the ordinary high water mark (OHWM) and adjacent wetlands under Section 404 of the CWA. However, the project does not involve any discharges of dredged or fill material into waters of the United States. The project is. not subject to regulation pursuant to Section 404 of the CWA. Corps jurisdiction is therefore not analyzed in this assessment. Because the project does not involve any discharge into a navigable water or the need for a Section 404 Permit from the Corps, the project is not subject to Section 401 of the CWA and RWQCB regulatory requirements are not included in this assessment. Calavera Lake and its associated spillway are defined by the capacity in which they can hold water up to the elevational limit of the dam and spillway. Riparian scrub and freshwater marsh habitats are located entirely within the areas confined by the dam and spillway elevational limits. Streambed and banks beyond the lake and dam are defined by the upper limits of the concrete-lined portion of the spillway apron and channel, and by definable streambed and banks within a deeply incised, primarily unvegetated channel beyond the spillway entering the natural drainage course before leaving the study area. The small tributary leading to the dam outlet structure consists of a riprap-lined channel that conveys flows east and then south along the boundary between the fill of the downstream face of the dam and the natural slope of an existing knoll during storm events. Potential CDFG jurisdiction consists of the area corresponding to the lake and spillway capacity, the natural streambed and banks downstream of the spillway, and streambed and banks associated with the outlet structure tributary. The riparian canopies and wetland vegetation, which are confined within the lake limits, and the wetland vegetation associated with the outlet structure, are included within the boundaries previously defined that are subject to CDFG jurisdiction. All. of the areas in the study area satisfying the Corps jurisdictional criteria for waters of the U.S., as described above would also be subject to potential CDFG jurisdiction. P:\I-1CRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) 19 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2912 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Habitat Fragmentation and Wildlife Movement Wildlife movement and habitat fragmentation are important issues in assessing impacts to wildlife. Habitat fragmentation occurs when aproposed action results in a single, unified habitat area being divided into two or more areas, such that the division isolates the two new areas from each other. Habitat isolation occurs when wildlife cannot move freely from one portion of the habitat to another, or from one habitat type to another (e.g., the fragmentation of habitats within and around clustered residential development). Habitat fragmentation also can occur when a portion of one or more habitats is converted into another habitat, as when scrub habitats are converted into annual grassland habitat by frequent burning. Fragmentation reduces the amount of habitat available to local wildlife populations. In general, a reduction in available habitat is followed by a reduction in wildlife populations because the remaining areas are too small to support prefragmentation population levels. If the fragmentation is too great, wildlife populations will not be able to subsist, and some or all of the species in a fragmented habitat area will disappear. This can occur on a local or regional scale, depending upon the degree and type of fragmentation occurring. Fragmentation is particularly critical for species that occupy already limited habitats, such as coastal sage scrub. If various stands of coastal sage scrub are too fragmented to provide sufficient continuous cover, or are too isolated from each other for an animal to move freely among various stands, that particular portion of the overall habitat may be lost to use by certain species. Based on the miniscule nature of the proposed impacts, LSA contends that the proposed project will neither limit wildlife movement substantially nor contribute substantially to fragmentation of habitat. IMPACTS Temporary Impacts Temporary impacts that may result from implementation of the proposed project include noise and dust disturbance to birds and other wildlife utilizing habitat in and adjacent to the project impact area. These disturbances will occur during maintenance activities for a limited duration. Fugitive dust generated during maintenance will be reduced to appropriate levels according to applicable ordinances and implementation of Best Management Practices (BMPs). Therefore, no adverse effects on biological resources due to fugitive dust are anticipated. Impacts associated with noise generation are minimal and temporary in nature. Permanent Impacts Since the vegetation to be removed is to be maintained in perpetuity, vegetation removal impacts are considered permanent in nature. Only the vegetation within the project footprint will be removed, and all removed vegetation will be taken away from the project site and disposed of properly. Indirect Impacts Indirect impacts include disturbance to nesting birds or wildlife occupying habitat within or adjacent to the project site due to construction noise and dust generation as discussed above. There is potential for construction-related sediment to enter the watercourse and indirectly affect downstream habitat. P:\HCR1102 - Calavera Dam Routine Maintenance\Bio Report'Final_BioIogicaI Resources Report.doc (I/I9t2Ol2) 20 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA However, the project will be compliant with all applicable ordinances pertaining to stormwater runoff and the project design will implement BMPs during construction to minimize potential impacts. Direct Impacts Direct impacts to habitat are expected from vegetation removal. These direct impacts are analyzed in more detail below. Impacts to Vegetation Communities. Direct project impacts will occur to areas classified as southern willow scrub, freshwater marsh, Diegan coastal sage scrub, open water, disturbed land, bare ground, and developed land. Impacts to southern willow scrub, freshwater marsh, and Diegan coastal sage scrub may require mitigation according to the I-IMP. Table D lists the anticipated impact of this project on vegetation communities on site and HMP-required mitigation ratios. Previously referenced Figure 3 shows the locations of the vegetation communities within the project study area. Table D: Impacts to Vegetation Communities Temporary impacts Permanent Impacts lIMP Mitigation Vegetation Community (acres) (acres) Requirements No net loss' Southern Willow Scrub 0 0.110 Replacement mitigation 1:1 (Riparian Scrub) to 2:1 No net loss' Freshwater Marsh 0 0.246 Replacement mitigation 1:1 to 2:1 Diegan Coastal Sage Scrub 0 0.040 2:1 (occupied) Open Water 0 0 No mitigation requirements Disturbed Areas 0 1.289 Mitigation fee Bare Ground 0 0.680 No mitigation requirements Developed 0 0 No mitigation requirements Total Impacts within Project 0 2.365 nla Limits' Mitigation ratio varies based on type of replacement habitat. 2 Total may not equal sum due to rounding. Impacts to open water are expected to occur due to the proposed temporary lowering of the reservoir by approximately 3 feet in order to remove submerged vegetation. However, since the reservoir's level naturally fluctuates, and since no direct impacts to open water are anticipated (e.g., equipment and/or tool usage within the water), no impact values are displayed in Table D. Since the developed land found within the project study area will only be used temporarily for vehicle/equipment access to the areas to be cleared (or will not accessed at all, as in the case of the building found within the project study area), and no direct impacts to this land use are anticipated, no impact values are displayed in Table D. P:\HCRI 102 - Calavera Dam Routine Maintenance'1310 Report\Final_Biological Resources Report.doc (1/19/2012) 21 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Impacts to Jurisdictional Waters Table E depicts the impacts to potential CDFG jurisdictional areas. Vegetation removal activities within nonwetland Corps-jurisdictional areas are not regulated by the Corps or RWQCB. Table E: Impacts to CDFG Jurisdictional Waters Agency Total (Acres) CDFG Jurisdictional Area 1.674 Impacts to Wildlife Appendix E addresses the potential for special-status species to occur within the project study area. Nesting Birds. The City proposes to conduct the maintenance work outside of the bird breeding season (February 15 through September 15); therefore, no impacts to nesting birds are anticipated. Special-Status Species. No special-status plant or wildlife species were identified on site during the general reconnaissance survey. Potentially suitable habitat for HMP-covered species including orangethroated whiptail, burrowing owl, coastal California gnatcatcher, Cooper's hawk, least Bell's vireo, Southern California rufous-crowned sparrow, and yellow-breasted 'Chat exists on site and may be indirectly affected by temporary construction disturbance and loss of suitable habitat. Additionally, potentially suitable habitat for non-HMP covered species including mud nama, Robinson's peppergrass, Blainville's homed lizard, coast patch-nosed snake, coastal whiptail, Coronado Island skink, red-diamond rattlesnake, rosy boa, San Diego ringneck snake, two-striped garter snake, Clark's marsh wren, yellow warbler, Dulzura pocket mouse, northwestern San Diego pocket mouse, San Diego desert woodrat, and western red bat was identified on site. Indirect impacts to these species could occur due to construction disturbance and loss of suitable habitat. Local and Regional Significance. The-habitat within the project study area is within an existing hardline preserve area within Core Area 3. Because it is part of a hardline preserve area, the City will consult with the applicable resource agencies and obtain approval for the HMP compliance (i.e., Consistency Findings) prior to the HMP compliance determination (i.e., Equivalency Findings). According to Appendix B of the HMP, the project is covered under "Water Operations and Maintenance - Reservoir Site Maintenance" for water projects. Wildlife Movement Corridors. The project study area is mostly contiguous and not subject to continuous disturbance. The project study area is within Core Area 3 as defined by the HMP and wildlife species likely use the site as a movement corridor. There is potential for temporary impacts to wildlife movement during construction; however, the short duration of construction is not expected to result in substantial impedances to wildlife movement. Upon completion of construction, the site will provide the same wildlife movement function as the existing situation. The project will not result in impacts to wildlife movement-beyond the existing conditions on site. P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) 22 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA MITIGATION General Mitigation Measures To avoid, minimize, and mitigate potential impacts to biological resources, the following measures are recommended: Habitat restoration or enhancement will be performed to meet the HMP requirements for impacts to coastal sage scrub. Mitigation will be required on site or off site through preservation, creation, or restoration of habitat in accordance with the mitigation ratios in Table F. Maximum avoidance and on-site conservation of coastal sage scrub is encouraged due to the presence of coastal California gnatcatchers. o The City will be responsible for providing mitigation at a 2:1 ratio for occupied coastal sage scrub pursuant to requirements of the HMP. Table F: Proposed Mitigation for Impacts to Vegetation Communities Total New Impact Area Anticipated HMP and Impact (requires Anticipated Vegetation Regulatory Agency Area mitigation) Mitigation Community Mitigation Requirement (acres) (acres) (acres) Southern Willow No net loss Scrub (Riparian Replacement mitigation 1:1 0.11 0.10 0.10-0.20 Scrub) to 2:1 No net loss Freshwater Marsh Replacement mitigation 1:1 0.25 0.18 0.18-0.36 to 2:1 Diegan Coastal 2:1 (occupied) 0.04 0 0 Sage Scrub Open Water 1:1 0.00 0 0 Disturbed Areas Mitigation fee 1.29 0.00 n/a Bare Ground No mitigation requirements 0.68 0.00 n/a Developed No mitigation requirements 0.70 0 n/a Totals' 3.07 0.28 0.28-0.56 Total may not equal sum due to rounding. Implementation of construction or clearing of vegetation within the project impact footprint shall occur outside of breeding season.(March through September). The USFWS will be notified at least seven days before clearing and grubbing begins. During construction conducted outside of the breeding season, a qualified biologist shall walk the area directly ahead of construction equipment to flush birds from the area. The biologist will immediately report to the USFWS the number and location of any federally listed birds disturbed by clearing and grubbing. No gnatcatchers will be injured or killed. If construction must commence during breeding season, then the City shall have a qualified biologist conduct a pre-construction survey for nesting birds, including raptors, within three days prior to construction. Should nesting birds be detected within 100 feet of the project impact footprint, the USFWS will be notified immediately of any federally listed species that are located during the pre-construction survey. A qualified biologist shall then P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report'Final_Biological Resources Report.doc (1/19t2012) 23 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA establish suitable buffer area (at least 300 feet) within which no construction activity may take place until the nest is no longer active. During the breeding season, construction noise shall be monitored regularly to maintain a threshold at or below 60 dBA hourly L within 300 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, as recommended in the draft Guidelines for Biological Studies (City of Carlsbad 2008). Wetlands and jurisdictional habitat affected by project construction will be replaced to ensure no net loss of wetland resources. The City will comply with requirements of the HMP to mitigate impacts. to disturbed wetlands. An in-lieu mitigation fee or a commitment to wetland creation, preservation, or restoration either on site or off site will be required per the HMP prior to project approval. This measure will be required by the resource agencies as a condition of the environmental permits. A Mitigation Monitoring and Reporting Program (MMRP) will be prepared by the City prior to approval of the project and will be included with resource agency permit application packages. Temporary impacts shall be returned to pre-existing contours and revegetated with appropriate native species. All revegetation plans shall be prepared and implemented consistent with MHCP Volume II, Appendix C (Revegetation Guidelines) and shall require written concurrence of the USFWS and CDFG. . . HMP Compliance The Guidelines for Biological Studies (Carlsbad 2008) includes a list of standard impaôt mitigation measures to be applied to all projects within the HMP. Many of the listed measures are not applicable to the-proposed project design. Applicable design guidelines and pre- and post-construction measures are listed below. Project Design Guidelines. Source: MHCP Vol. I, Section 6.2.3, and Agency comments. Locate staging areas in disturbed habitat, to the degree feasible. Designate no-fueling zones a minimum distance of 10 meters (33 feet) from all drainages and away from fire-sensitive areas. Pre-construction Mitigation Measures. Sources MHCP Vol. 1, Sec 6.2.3; and MHCP Vol. II, Appendix B, Agency comments. A qualified biologist shall conduct a training session for all project personnel prior to proposed activities. At a minimum, the training shall include a description of the target species of concern and its habitats, the general, provisions of the Endangered Species Act (Act) and the HMP, the need to adhere to the provisions of the Act and the HMP, the penalties associated with violating the provisions of the Act, the general measures that are being implemented to conserve the target species of concern as they relate to the project, access routes, and project site boundaries within which the project activities must be conducted. , • • The footprint of disturbance shall be minimized to the maximum extent feasible and shall be specified in the construction plans. Construction limits will be in with orange P:\HCR1102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological ResourcesReporidoc (1/1912012) 24 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD CALIFORNIA fencing, which will be maintained until the completion of all construction activities. All employees shall be instructed that their activities, vehicles, equipment, and construction materials are restricted to the proposed project footprint, designated staging areas, and routes of travel. A water pollution and erosion control plan shall be developed that describes sediment and hazardous materials control, dewatering or diversion structures, fueling and equipment management practices, and other factors deemed necessary by reviewing agencies. Erosion control measures shall be monitored on a regularly scheduled basis, particularly during times of heavy rainfall. Corrective measures will be implemented in the event erosion control strategies are inadequate. Sediment/erosion control measures will be continued at the project site until such time as the revegetation efforts are successful at soil stabilization. Construction-Related Mitigation Measures. Sources: MHCP Vol. I, Sec 6.2.3; MHCP Vol. II, Appendix B; HMP p. D-95; and Agency comments. Construction monitoring reports shall be completed and provided to the City summarizing how the project is in compliance with applicable conditions. The project biologist should be empowered to halt work activity if necessary and to confer with City staff to ensure the proper implementation of species and habitat protection measures. Any habitat destroyed that is not in the identified project footprint shall be disclosed immediately to the City, USFWS, and CDFG and shall be compensated at a minimum ratio of 5:1. Access to and from the site will be located along existing access routes or disturbed areas to the greatest extent possible. All access'routes outside of existing roads or construction areas will be clearly marked. Construction employees will limit their activities, vehicles, equipment, and construction materials to the fenced project footprint. Equipment storage, fueling, and staging areas shall be located on disturbed upland sites with minimal risk of direct drainage into riparian areas or other sensitive habitats, and at least 100 feet from waters of the U.S. These designated areas shall be located in such a manner as to prevent any runoff from entering sensitive habitat. All necessary precautions shall be taken to prevent the release of cement or other toxic substances into surface waters. All project-related spills of hazardous materials shall be reported to the City and shall be cleaned up immediately and contaminated soils removed to approved disposal areas. When stream flows must be diverted, the diversions shall be conducted using sandbags or other methods requiring minimal instream impacts. Silt fencing or other sediment trapping materials shall be installed at the downstream end of construction activity to minimize the transport of sediments off site. Settling ponds where sediment is collected shall be cleaned out in a manner that prevents the sediment from re-entering the stream. Care shall be exercised when removing silt fences, as feasible, to prevent debris or sediment from returning to the stream. Erodible fill material shall not be deposited into watercourses. Brush, loose soils, or other similar debris material shall not be stockpiled within the stream channel or on its banks. The removal of native vegetation shall be avoided and minimized to the maximum extent practicable. Temporary impacts shall be returned to pre-existing contours and revegetated P:\HCRI 102- Calavera Dam Routine Mainlenance'810 Report\Final_Biological Resources Report.doc (I/19t2012) 25 ISA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA with appropriate native species. All revegetation plans shall be prepared and implemented consistent with MIHCP Volume II, Appendix C (Revegetation Guidelines) and shall require written concurrence of the USFWS and CDFG. Construction through sensitive areas should be scheduled to minimize potential impacts to biological resources. Construction adjacent to drainages should occur during periods of minimum flow (i.e., summer through the first significant rain of fall) to avoid excessive sedimentation and erosion and to avoid impacts to drainage-dependent species. Construction near riparian areas or other sensitive habitats should also be scheduled to avoid the breeding season (March through September) and potential impacts to breeding bird species. Noise impacts are a concern around areas supporting breeding bird habitat. To avoid or minimize noise impacts, limit construction activities during the breeding season (March through September) to those that will not produce significant noise impacts (i.e., noise levels greater than 60 dB L [decibels, equivalent sound level] at the edge of the habitat of concern). Pre-construction surveys at potential impact areas will be conducted from mid-May to mid-June. Lighting in or adjacent to the preserve will not be used, except where essential for roadway, facility use, and safety. If nighttime construction lights are necessary, all lighting adjacent to natural habitat will be shielded and/or directed away from habitat. O Fugitive dust will be avoided and minimized through watering and other appropriate measures. If dead or injured listed species are located, initial notification must be made within three working days, in writing, to the USFWS Division of Law Enforcement in Torrance, California and by telephone and in writing to the applicable jurisdiction, Carlsbad Field Office of the USFWS, and CDFG. Exotic species that prey upon or displace target species of concern should be permanently removed from the site. To avoid attracting predators of the target species of concern, the project site shall be kept as clean of debris as possible. All food-related trash items shall be enclosed in sealed Containers and regularly removed from the site(s). Pets of project personnel shall not be allowed on site where they may come into contact with any listed species. The City of Carlsbad has the right to access and inspect any sites of approved projects including any restoration/enhancement area for compliance with project approval conditions including these BMPs. The USFWS and CDFG may accompany City representatives on these inspections. O All mitigation sites shall be conserved through fee title acquisition or Conservation Easement,, as defined in California Civil Code Section 815. 1, and proof of recordation shall be provided to the jurisdictional city prior to land disturbance. Special Requirements .' The project is not located within a Standards area or coastal zone; however, it is located adjacent to and partially within the preserve boundary. Therefore, special requirements pertaining to Adjacency Guidelines are applicable. , P:\HCRI 102- Calavera Darn Routine Maintenance\Bio Report\Final_I3ioIogicaI Resources Report.doc (1/1912012) 26' LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Adjacency Standards apply to all projects that occur next to a hardline preserve or an undeveloped portion of a Standards Area that might be conserved in the future. HMP Section F-3 (p. F- 16) discusses adjacency standards in detail. Adjacency Standards address, Fire Management, Erosion Control, Landscaping Restrictions, Fencing, Signs and Lighting, and Predator and Exotic Species Control. Because the project does not propose any development near the preserve boundary, the majority of these topics do not apply. Erosion control measures are recommended to comply with the Adjacency Standards in the HMP. Recommendations for erosion control are summarized as follows: Erosion Control Management Recommendation's (Adjacency Standards) 1) Identify and Prioritize Areas for Erosion Control Identify areas of moderate to severe erosion within and adjacent to the preserve. O Determine causes of erosion and rank identified erosion areas according to threats to biological resources. Include an assessment of cost for erosion control measures. Develop Erosion Control Plans O Develop and implement an erosion control plan for high priority erosion control areas. In general, this will include establishing physical features to slow surface flow and dampen initial precipitation impact, and revegetation of eroded surfaces for long-term protection. O In steep areas, rock areas, and areas of high storm flow, permanent rock or concrete revetments may be required to stabilize undesirable erosive forces. Address Slope Stabilization and Surface Drainage o Prepare contingency native seeding plans for highly erosive areas temporarily disturbed by fire. O Prohibit bare surface grading for fire control on slopes. Ensure that all techniques implemented for fire control leave (or replace) adequate vegetation cover to prevent surface erosion. O Ensure that all areas identified for revegetation are adequately stabilized by either a binder or straw cover after planting to minimize surface erosion. O Ensure that no new surface drainage is directed into the preserve. Species-Specific Mitigation Requirements Special requirements pursuant to the HMP, Section D-6, for impacts to least Bell's vireo are applicable to the project. Because the project is not introducing conditions favorable for brown- headed cowbirds (Molothrus ater), those measures pertaining to management of brown-headed cowbirds are not applicable. The applicable measures are summarized below: Survey by qualified biologist using approved survey protocol all areas containing suitable habitat. Surveys shall occur prior to any proposed impact as part, of the project review process (e.g., CEQA process) both within and outside of the Focused Planning Area (FPA). Surveys shall be conducted when impacts could occur as a result of indirect impacts by placement of the project in P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Reportdoc (1/1912012) 27 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA or adjacent to occupied habitat or through creation of suitable conditions for brown-headed cowbirds (e.g., agricultural fields, livestock presence, woodland parks, or roadsides). Any take inside and outside of the FPA shall be consistent with the conditions outlined herein. Projects having direct or indirect impacts to the least Bell's vireo within the HMP shall adhere to the following measures to avoid or reduce impacts: The removal of native vegetation and habitat shall be avoided and minimized to the maximum extent practicable. Determination of adequate avoidance and minimization of impacts shall be consistent with Section D-6 of the HMP. Deviations from these guidelines shall require written concurrence of USFWS and CDFG. Projects shall be carried out consistent with standard BMPs provided in the text of the HMP. O The project will avoid impacts during the breeding season of the least Bell's vireo (generally March 15 through September 15). Projects that cannot be conducted without placing equipment or personnel in or adjacent to sensitive habitats shall be timed to ensure that habitat is removed prior to the initiation of the breeding season (generally before March 15). Biological buffers of at least 100 feet shall be maintained adjacent to occupied least Bell's vireo habitat, measured from the outer edge of riparian vegetation. Within this 100-foot buffer, no new development shall be allowed, and the area shall be managed for natural biological valties as part of the preserve system. Buffers less than 100 feet shall require written concurrence of the USFWS and CDFG within 30 days of receipt of written request for concurrence by the local jurisdiction. least Bell's vireo populations within the FPA shall be managed consistent with Conservation Goals of the Species Evaluation for this species (Appendix C of the HMP). The project will not affect any other federally or state-listed (non-covered) species, narrow endemic, or no-take species for which additional mitigation would be required. Habitat Mitigation Mitigation will be required on site or off site through preservation, creation, or restoration of habitat in accordatice with the mitigation ratios in previously referenced Table F. As discussed above, the project area underwent vegetation removal during the Calavera Dam Remedial Improvements Project, completed in 2009. Mitigation in the form of preservation, creation, and restoration was implemented and no new mitigation is required for vegetation removal activities in these areas. Previously referenced Table F includes impacts for each vegetation type mapped within the project study area. The total impact area includes areas that were previously maintained (for which mitigation has been implemented). Some of this total impact area does not require new additional mitigation. Mitigation for impacts to disturbed lands may be fulfilled with out-of-kind mitigation if they are contributing to assembly of a large contiguous habitat parcel, as discussed in Table 11 of the HMP. The City has completed mitigation for impacts to 0.04 acre of coastal sage scrub in conjunction with a previous project (Lake Calavera Dam Remedial Improvements Project, 2009). P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) 28 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA The City will be responsible for providing mitigation for permanent impacts to 0.18 acre of freshwater marsh at a 1:1(0.18 acre) or 2:1 ratio (0.36 acre) pursuant to requirements of the HMP. The City will be responsible for providing mitigation for permanent impacts to 0.10 acre of southern willow scrub at a 1:1(0.10 acre) or 2:1 ratio (0.20 acre) pursuant to requirements of the HMP. The City has completed mitigation for-impacts to 1.289 acres of disturbed habitat in conjunction with a previous -project (Lake Calavera Dam Remedial Improvements Project, 2009). Mitigation Requirements for Jurisdictional Resources Wetlands and jurisdictional habitat affected by project construction will be replaced to ensure no net loss of wetland resources. The City will comply with requirements of the HMP to mitigate impacts to wetlands. An in-lieu mitigation fee or a commitment to wetland creation, enhancement, preservation, or restoration either on site or off site will be required per the HMP prior to project approval. Wetland creation on site is not considered to be feasible due to the nature of the project (i.e., wetland vegetation removal from the faces of the dam). This measure will be required by the CDFG as a condition of the environmental permit. The resource agencies may require mitigation for impacts to jurisdictional wetlands and waters in addition to the HMP-required mitigation. The exact mitigation will be determined upon consultation with the CDFG as shown in Table G. Table G: Mitigation for Impacts to CDFG Jurisdictional Wetlands and Waters Previously Affected Area Anticipated Anticipated (acres) - No New New Impact Mitigation Agency Mitigation Ratio Mitigation Required Area (acres) Requirement (acres) CDFG Jurisdictional 2:1 Creation or 1.674 0.028 0.056 Area Enhancement CONCLUSION With incorporatioti of mitigation measures listed above, the project will be consistent with the HMP, and federal and state requirements, and will' have a less than significant impact on biological resources within th6 project study area. P:\HCR1102 - Calavera Dam Routine Maintenance\Bio Repori\Final_Biological Resources Report.doc (1/1912012) 29 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT - CITY OF CARLSBAD, CALIFORNIA REFERENCES California Department of Fish and Game, Natural Diversity Database. April 2011. Special Vascular Plants, Bryophytes, and Lichens List. Quarterly publication. 71 pp. CaliforniaNative Plant Society (CNPS). 2007. Inventory of Rare and Endangered Plants (online edition, v7-07b). California Native Plant Society. Sacramento, California. Accessed on June, 14, 2011, from http://www.cnps.org/inventory. California Natural Diversity Data Base. 2007. Biogeographic Data Branch. California Department of Fish and Game. RareFind (Version 3.1.0), accessed June 14, 2011. Center for Natural Lands Management. 2011. Coastal California Gnatcatcher Observations. Lake Calavera. City of Carlsbad. 1999 as amended. Habitat Management Plan for Natural Communities in the City of Carlsbad. December 1999, with addendum. City of Carlsbad. 2006. Mitigated Negative Declaration for the Lake Calavera Reservoir Remedial Improvements Project, CUP 04-1 l/HMP 05-03. City of Carlsbad. 2008. Draft Guidance for Biological Studies. Prepared by Technology Associates (TAlC). May29, 2008. Division of Safety of Dams. 2010. Inspection Report. Calavera Reservoir. Hickman, J.C., ed. 1993. The Jepson Manual: Higher Plants of California. University of California Press, Berkeley and Los Angeles, California. 1,400 pp. Holland, R.F. 1986. Preliminary Descriptions of the Terrestrial Natural Communities of California.. The Resources Agency, Department of Fish and Game, State of California. LSA Associates, Inc. 2011. CDFG Assessment for Calavera Dam Routine Maintenance Project. Merkel & Associates, Inc 2002. Biological Resources Report. Lake Calavera. Reed, P.B., Jr. 1988. National List of Plant Species that Occur in Wetlands: California (Region 0). United States Fish and Wildlife Service BiologicaiReport 88 (26.10). 135 pp. Unitt, Phillip. 2004. San Diego County. Bird Atlas. San Diego Natural History Museum, San Diego, California. 645 pp. P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/I9t2012) 30 LSA ASSOCIATES, INC. - BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA APPENDIX A SITE PHOTOS P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) PHOTOGRAPH 1: View from the northern corner of the project study area,facing southeast. PHOTOGRAPH 2: New of the spillway, facing southwest. PHOTOGRAPH 3: Kew of the downstream section of the PHOTOGRAPH 4: View ofthesouthwestern section ofthe project spillway, facing northwest. study area, facing south. This area is located downstream ofthe concrete spillway. L S A Calavera Dam Long-Term Maintenance Project Site Photographs 1:\HCRII02\G\Site_Photos-1.cdr (6/IS/Il) -- PHOTOGRAPH 5: View of the non-native vegetation, along the PHOTOGRAPH 6: View of the downstream face of the dam, western portion of the downstream face of the facing west dam,facing east. —r rr• - - • Oki -.. -- .. -.- r PHOTOGRAPH 7: View of the outlet structure located at the base of the downstream face of the dam, facing southwest. PHOTOGRAPH PHOTOGRAPH 8: View of the upstream face of the dam, facing west. L S A Calavera Dam Long-Term Maintenance Project Site Photographs 1:\HCR1 102\G\Site_Photos-2.cdr (6/I5/I1) LSA ASSOCIATES, INC. • BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT - CITY OF CARLSBAD, CALIFORNIA APPENDIX B CNDDB AND CNPS SPECIES LISTS P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/1912012) California Department of Fish and Game Natural Diversity Database Selected Elements by Scientific Name - Portrait 9 Quad around San Luis Rey Scientific Name/Common Name Element Code Federal Status State Status GRank SRank CDFGor CNPS 1 Abronla vilosa var. aurita PDNYCO1OP1 G5T3T4 S2 1B.1 chaparral sand-verbena 2 Acanthomintha Ilicifolla PDLAM01010 Threatened Endangered G2 S2 1B.1 San Diego thom-mint 3 Accipitercooperil ABNKC12040 G5 S3 Coopers hawk 4 Adolph/a califomlca PDRHAO1010 G3G4 S2 2.1 California adoiphia 5 Almophlla ruficeps canescens ABPBX91091 G5T2T4 52S3 southern California rufous-crowned sparrow 6 Ambrosia pumila PDASTOCOMO Endangered GI S1.1 113.1 San Diego ambrosia 7 Amphlspiza bell! bell! ABPBX97021 G5T2T4 S2? Bells sage sparrow 8 Anaxyrus cal/fomicus AAABB01230 Endangered G2G3 S2S3 SC arroyo toad 9 Antrozous pallidus AMACC10010 G5 S3 Sc pallid bat 10 Aqullachrysaetos ABNKC22010 G5 S3 golden eagle 11 Arcfostaphylos glandulosa ssp. crass/folla PDERI040E8 Endangered G5TI S1.1 16.1 Del Mar manzanita 12 Artemisla palmer! PDASTOS16O G3 S3.2 4.2 San Diego sagewort 13 Asp!doscelishype,ythra ARACJ02060 . G5 S2 SC orangethroat whiptail 14 Aspidosce//st!grlssteJneger/ ARACJ02143 G5T3T4 S253 coastal whiptail 15 Astragalus fenervar. (It! PDFABOF8R2 Endangered Endangered G1T1 S1.1 1B.1 coastal dunes milk-vetch 16 Atrlplexcoulterl PDCHE040EO G2 S2.2 18.2 Coulter's saitbush 17 Atriplexpaclfica PDCHE041CO G3G4 S2.2 1B.2 South Coast saltscale 18 Atr/p!exserenana var. dav!dsónll PDCRE041T1 G5T2? S2? 18.2 Davidson's saltscale 19 Baccharls vanessae PDASTOWOPO Threatened Endangered Gi S1.1 16.1 Encinitas bacchans 20 Branchlnecta sand/egonensls ICBRA03060 Endangered Gi Si San Diego fairy shrimp 21 Brodlaea fillfolla PMLIL00050 Threatened Endangered G2 S2.1 1B.1 thread-leaved brodiaea 22 Brod!aeaorcutt!! PMLILOCOBO GI Si 1B.1 Orcutts brodiaea 0 23 Campylorhynchusobrunnelcaplllus ABPBG02095 G5T3Q S3 SC sandiegens!s coastal cactus wren Commercial Version -- Dated February 27, 2011 - Biogeographic Data Branch Pagel Report Printed on Tuesday, June 14, 2011 Information Expires 08/27/2011 California Department of Fish and Game Natural Diversity Database Selected Elements by Scientific Name - Portrait 9 Quad around San Luis Rey CDFG or Scientific Name/Common Name Element Code Federal Status State Status GRank SRank CNPS 24 Ceanothus verrucosus PDRHA041JO G3 S2.2 2.2 wart-stemmed ceanothus 25 Centromadla parryl ssp. austrails PDAST4ROP4 G412, S2.1 113.1 southern tarplant 26 Centromadlapungens ssp. iaevls PDAST4ROR4 G3G4T2' S2.1 18.1 smooth tarplant 27 Chaenact!s g!abrluscula var. orcuttlana PDAST20095 G5TI Si 1B.1 Orcutt's pincushion 28 Chaetod!pus ca!!fomkus femoralls AMAFD05021 G5T3 S2? Sc Dulzura pocket mouse 29 Chaetodlpus fal!ax fa!!ax AMAFD05031 G5T3 52S3 SC northwestern San Diego pocket mouse 30 Charadrlus alëxandr!nus nlvosus ABNNB03031 Threatened G4T3 S2 Sc western snowy plover - 31 Char!na trlv!rgata ARADA01020 G4G5 S3S4 rosy boa 32 Choeronycterls mexicana AMACB02010 G4 Si SC Mexican long-tongued bat 33 Chor!zanthe orcuttlana PDPGN040GO Endangered Endangered GI S1.1 113.1 Orcutts spineflower 34 Chorlzanthe poiygonoldes var. longispina PDPGN040K1 G5T3 S3 113.2 long-spined spineflower 35 C!clnde!a senhis frost! 11C0L02121 G4T1 Si senile tiger beetle 36 Circus cyaneus ABNKC11010 G5 S3 SC northern harrier 37 Comarostaphylls dlvers!folla ssp. dlvers!fo!!a PDERIOB0I1 G3T2 S2 1 B.2 summer holly 38 Corethrogyne fllagln!fo!!a var. lln!folla PDAST2MO27 S G4T1 S1.1 1B.1 Del Mar Mesa sand aster 39 Crotalus ruber ARADE02090 G4 S2? SC red-diamond rattlesnake 40 oanausplexlppus 11LEPP2010 G5 S3 monarch butterfly 41 Dendro!ca petechia brewster! ABPBX03018 G5T3? S2 SC yellow warbler 42 Dladophis punctatus sim!lis ARADB1001A G512T3 S2? San Diego nngneck snake 43 D!podomys stephens! AMAFD03100 Endangered Threatened G2 S2 Stephens' kangaroo rat 44 Dudleya blochmaniae ssp. blochmanlae PDCRA04051 G2T2 S2.1 1 B. 1 Blochman's dudleya 45 Dudleya multicau!is PDCRA040HO G2 S2 1 B.2 many-stemmed dudleya 46 Dudleya varlegata PDCRA040RO G2 S2.2 1B.2 variegated dudleya .- - Commercial Version -- Dated February 27, 2011 - Biogeographic Data Branch Page 2 Report Printed on Tuesday, June 14, 2011 Information Expires 08/27/2011 California Department of Fish and Game Natural Diversity Database Selected Elements by Scientific Name - Portrait 9 Quad around San Luis Rey Scientific Name/Common Name Element Code Federal Status State Status GRank SRank CDFGor CNPS 47 Dudleya viscida PDCRA040TO . . G2 S2.2 113.2 sticky dudleya .48 Elanusleucurus ABNKC06010 . G5 S3 white-tailed kite 49 Empldonaxtrallliiexflmus . ABPAE33043 Endangered Endangered G5T1T2 Si southwestern willow flycatcher 50 Emys marmorata . ARAAD02030 . G3G4 S3 SC western pond turtle 51 Eremophlla alpestris actia ABPAT0201 1 . G5T3Q S3 California homed lark 52 Elynglumarlstulatum var. parishil PDAPIOZO42 Endangered Endangered G5T2 S2.1 113.1. San Diego button-celery 53 Erynglumpendletonense PDAPIOZ120 . Gi S1.1 1113.1 Pendleton button-celery 54 Erysimumammophllum PDBRA16010 . G2 S2.2 1B.2 sand-loving wallflower 55 Eucyclogoblus newber,yl AFCQN04010 Endangered G3 S2S3 SC tidewater goby 56 Eumops perotis cafifomicus AMACD02011 G5T4 S3? . SC western mastiff bat 57 Euphorblamisera, .PDEUPOQ1BO . G5 51 2.2 cliff spurge 58 Ferocactusvlrldescens PDCAC08060 G4 S2 2.1 San Diego barrel cactus 59 Gilaorcutt!I . AFCJB13120 G2 S2 SC arroyo chub 60 Harpagonellapalrneri PDBOROH010 G4 S3.2 4.2 Palmer's grapplinghook 61 Hazard/a orcutti! PDAST41-1070 Candidate Threatened Gi Si 18.1 Orcutt's hazardia 62 Heterotheca sessi!flora ssp. sesslilfiora PDAST4VOK2 ' G412T3 S2.1? 113.1 beach goldenaster 63 Horkellatruncata PDROSOWOGO G3 S2.3 1113.3 Ramona horkelia 64 Icteria v!rens . ABPBX24010 . G5 S3 Sc yellow-breasted chat 65 isocoma menziesll var. decumbens PDAST57091 G3G5T2T3 S2.2 1 B.2 decumbent goldenbush 66 Iva hayesiana PDAST580AO . G3? S2.2? 2.2 San Diego marsh-elder 67 /xobrychusex!IIs ABNGA02010 G5 51 SC least bittern 68 Lasiurus cinereus . AMACC05030 G5 S4? hoary bat 69 Laslurus xanthinus . AMACC05070 G5 53 SC western yellow bat Commercial Version -- Dated February 27, 2011 - Biogeographic Data Branch Page 3 Report Printed on Tuesday, June 14, 2011 Information Expires 08/27/2011 California Department of Fish and Game Natural Diversity Database Selected Elements by Scientific Name - Portrait 9 Quad around San Luis Rey Scientific Name/Common Name Element Code Federal Status S State Status GRank SRank CDFGor CNPS 70 Lasthenla glabrata ssp. coulteri PDAST5LOA1 G4T3 S2.1 113.1 : Coulter's goldfields 71 Laterallusfamaicensis cotumiculus ABNME03041 Threatened G4T1 .51 California black rail 72 Lepldium vlrgln!cum var. robinson/I PDBRAI M114 G5T2? S2.2 1 B.2 Robinson's pepper-grass 73 Leptosyne maritlma PDAST2LOLO G3 S2.2 22 sea dahlia 74 Lepus ca!!fornlcus bennett!! AMAEB03051 G5T3? S3? SC San Diego black-tailed jackrabbit 75 Lotus nuttailanus PDFAB2AOVO GI S1.1 113.1 Nuttall's lotus 76 Monarde!!a hypoleuca ssp. !anata PDLAM180A2 G4T2 S2.2 113.2 felt-leaved monardella 77 Mulllac!eve!and!I PMLIL1HO10 G2 S2 113.1 San Diego goldenstar 78 Myosurus mlnimus ssp. apus PDRANOH031 G5T2Q S2.2 3.1 little mousetail 79 Myotls yumanensls . AMACCO 1020 G5 S4? Yuma myotis 80 Nama stenocarpum PDI-IYD0A0H0 G4G5 S152 2.2 mud nama 81 Navarretlafossalls PDPLM00080 Threatened Gi Si 1B.1 Moran's nosegay 82 Nemacau!Is denudata var. denudata PDPGN0G011 G3G4T3? S2.2 113.2 coast woolly-heads 83 Nemacau!Is denudata var. grad/Is PDPGNOG012 G3G4T3? S2 2.2 slender cottonheads 84 Neotoma !ep!da Intermed!a AMAFF08041 G5T3? S37 SC San Diego desert woodrat 85 Nol/na cismontana PMAGA080EO G2 S2 1B.2 chaparral nolina 86 Nyctlnomops femorosaccus AMACD04010 G4 52S3 SC pocketed free-tailed bat 87 Orcutt!a ca!!forn!ca S PMPOA4GO10 Endangered Endangered G2 S2.1 113.1 California Orcutt grass S 88 Orobanche parishfi ssp. brachyloba PDOR004OA2 G4?T3 S3.2 4.2 short-lobed broomrape S S 89 Passercu!us sandw!chèns!s be/ding! ABPBX99015 S Endangered G5T3 S3 Belding's savannah sparrow 90 Perognafhuslonglmembrfspac!flcus AMAFDO1042 Endangered G5T1 Si SC Pacific pocket mouse 91 Phacella stellar/s PDHYD00510 Candidate G2? 51 113.1 Brand's star phacelia . S 92 Phrynosoma bia!nv!!!ll ARACF12100 S G4G5 S354 sc coast homed lizard Commercial Version -- Dated February 27, 2011 - Biogeographic Data Branch Page 4 Report Printed on Tuesday, June 14, 2011 Information Expires 08/27/2011 Endangered Endangered Threatened G1G2 S1.1 1B.1 G5T1T2 Si G5 S2S3 G5T3 S2S3 Sc G3 S3 Sc G5 S2.1? 2.1 Endangered Endangered Endangered Endangered Endangered G4T2T3Q S2S3 G1 Si G3 S2 G5 S4 G3 S2.2 G3 S2 G5T1T2 S1S2 G2G3 S2S3 G5T2 S2 1B.2 SC 113.2 Sc SC California Department of Fish and Game Natural Diversity Database Selected Elements by Scientific Name - Portrait 9 Quad around San Luis Rey Scientific Name/Common Name Element Code Federal Status State Status GRank 93 Plegadis chihl ABNGE02020 G5 white-faced ibis CDFGor SRank CNPS Si 94 P!estiodon skilfonlanus infemarletalis ARACHO1114 G5T2T3Q Si S2 SC Sc Coronado Island skink 95 Polloptlla callfomica californica ABPBJ08081 coastal California gnatcatcher 96 Quercus dumosa PDFAG050DO Nuttall's scrub oak 97 Rallus long/rostrls lev!pes ABNME05014 light-footed clapper rail 98 R/paria rlparla ABPAU08010 bank swallow 99 Sa!vadora hexalepis v!rgu!fea ARADB30033 coast patch-nosed snake 100 Speahammond!! AAABF02020 western spadefoot 101 Stemod!a durantlfolla PDSCR1 UO10 purple stemodia 102 Sternula ant!I!arum brown! ABNNM08103 California least tern 103 Sfrepfocepha!us woottoni 1CBRA07010 Riverside fairy shrimp 104 Suaeda esferoa PDCHEOP000 estuary seablite 105 Tax!deafaxus AMAJF04010 Arnencan badger 106 Tetracoccusdlo!cus PDEUPICO10 Parry's tetracoccus 107 Thamnoph!s hammond!! ARADB36160 two-striped garter snake 108 Thamnophls s!rta!ls ssp. ARADB3613F south coast garter snake 109 Tryon!a Imitator IMGASJ7040 mimic tryonia (=California brackishwater snail) 110 Vireo be!!llpusi!us ABPBWO1114 least Bell's vireo Threatened G3T2 S2 Commercial Version -- Dated February 27, 2011 - Biogeographic Data Branch Page 5 Report Printed on Tuesday, June 14, 2011 Information Expires 08/27/2011 CNPS Inventory Results Page 1 of 3 Plant List 73 matches found. Click on scientific name for details Search Criteria Founding Quads around 331171313 Scientific Name Common Name Family Lifeform Rare Plant State Global Rank Rank Rank Abronia maritima red sand-verbena Nyctaginaceae perennial herb 4.2 S3? G4? Abronia villosa var. aurita chaparral sand-verbena Nyctaginaceae annual herb 113.1 S2 G5T3T4 Acánthomintha ilicifolia San Diego thorn-mint Lamiaceae annual herb 113.1 S2 G2 Adothia californica California adolphia Rhamnaceae perennial deciduous 2.1 S2 G3G4 shrub Ambrosia pumila San Diego ambrosia Asteraceae perennial rhizomatous 113.1 S1.1 G1 herb Arctostahylos plandulosa sso. Del Mar manzanita Ericaceae perennial evergreen 1 BA S1.1 G5T1 crassifolia . shrub Artemisia Palmeri San Diego sagewort Asteraceae perennial deciduous shrub 4.2 G3 S3.2 Asplenium vespertinum western spleenwort Aspleniaceae perennial rhizomatous herb 4.2 S3.2 G3? Astrapalus tener var. titi coastal dunes milk-vetch Fabaceae annual herb 1 B.i S1.1 Gill Atriplex coulteri Coulter's saltbush Chenopodiaceae perennial herb i 8.2 S2.2 G2 Atriplex pacifica South Coast saltscale Chenopodiaceae annual herb 113.2 S2.2 . . G3G4 Atriplex serenana var. davidsonii Davidson's saltscale Chenopodiaceae annual herb 18.2 S2? G512? 8accharis vanessae Encinitas baccharis Asteraceae perennial deciduous shrub 1B.1 51.1 Gi Bloomeria clevelandil San Diego goldenstar Themidaceae . perennial bulbiferous 1 B S2 G2 herb Brodiaea filifolia thread-leaved brodiaea Themidaceae perennial bulbiferous 1B.1 S2.1 G2 herb Brodiaea orcuttii Orcutt's brodiaea Themidaceae "' '' ''"" herb 1 B.i Si Gi Camissonia lewisii Lewis' evening-primrose Onagraceae annual herb 3 S1S3 G2G3 Ceanothus verrucosus wart-stemmed ceanothus Rhamnaceae perennial evergreen shrub .2.2 S2.2 G3 Centromadia parrvi ssp. australis southern tarplant Asteraceae annual herb 1 B.i S2.1 G412 Centromadia pungens ssp. laevis smooth tarplant Asteraceae annual herb i B.i S2.1 G3G4T2 Chaenactis glabriuscula var. Orcutt's pincushion Asteraceae annual herb iB.i Si G5T1 orcuttiana . Chorizanthe orcuthana Orcutt's spineflower Polygonaceae annual herb 1 B.i SI.i Gi Chorizanthe polygonoidés var. long-spined spineflower . Polygonaceae annual herb 1 B.2 S3 G513 lonpispina Cistanthe maritima seaside calandrinia Portulacaceae annual herb 4.2 S3.2 G3G4 Clarkia delicata delicate clarkia Onagraceae annual herb 1 B.2 S2.2 G2 http://www.rareplants.cnps.org/result.html?adv=t&quad=33117B3:9 6/14/2011 CNPS Inventory Results Page . of 3 ComarostaDhylis diversifolia ssø. summer holly Ericaceae perennial evergreen 18.2 S2 G3T2 diversifolia .. shrub Convolvulus simulans small-flowered morning- Convolvulaceae annual herb 4.2 S3.2 63 glory . . Corethrogyne filaginifolia var. San Diego sand aster Asteraceae perennial herb 113.1 . Si.i G4T1 incana Corethropyne filapinifolia var. Del Mar Mesa sand aster Asteraceae perennial herb 1 B.i S1.1 G4T1 linifolia Deinandra Daniculata paniculate tarplant Asteraceae annual herb 4.2 S3.2 G3G4 Dichondra occidentalis western dichondra Convolvulaceae perennial rhizomatous 4.2 S3.2 G4? herb Dudleva blochmaniae ssp. Blochmans dudleya . Crassulaceae perennial herb 1 B.i S2.1 .G2T2 blochmaniae Dudleva multicaulis many-stemmed dudleya Crassulaceae perennial herb 1 B.2 S2 G2 Dudleya variegata variegated dudleya Crassulaceae perennial herb 1 B.2 'S2.2 G2 Dudleva viscida sticky dudleya Crassulaceae perennial herb 1 B.2 S2.2 G2 Eryngium aristulatum var. parishii San Diego button-celery Apiaceae annual / perennial herb 1 B.i S2.1 G5T2 Erynpium Dendletonense Pendleton button-celery Apiaceae perennial herb 1 B.i S1.1 Gi Ervsimum ammoDhilum 0 sand-loving wallflower Brassicaceae perennial herb 1 B.2 . S2.2 G2 Euphorbia misera cliff spurge Euphorbiaceae perennial shrub 2.2 Si G5 Ferocactus viridescens San Diego barrel cactus Cactaceae perennial stem 2.1 S2 G4 succulent Harpaponella palmeri Palmer's grapplinghook Boraginaceae annual herb 4.2 S3.2 G4 Hazardia orcuttii Orcutt's hazardia Asteraceae perennial evergreen 1 B.i S1 G1 shrub Heterotheca sessiliflora ssp. beach goldenaster Asteraceae perennial herb 1 B.1 S2.1? G412T3 sessiliflora Holocarpha virgata ssp. elongata graceful tarplant Asteraceae annual herb 4.2 S3.2 G5T3 Horkelia truncata Ramona horkelia Rosaceae perennial herb 18.3 S2.3 G3 Isocoma menziesii var. decumbens decumbent goldenbush Asteraceae . perennial shrub 18.2 S2.2 G3G512T3 Ivahayesiana San Diego marsh-elder Asteraceae perennial herb 2.2 S2.2? G3? Juncus acutus ssø. leopoldii southwestern spiny rush Juncaceae perennial rhizomatous herb 4.2 S3.2 G5T5 Lasthenia glabrata ssp. coulteri Coulters goldfields Asteraceae annual herb 18.1 S2.1 G413 Lepidium virpinicum var. robinsonii Robinson's pepper-grass Brassicaceae annual herb 1 B.2 S2.2 G5T2? Leptosvne maritima sea dahlia Asteraceae perennial herb 2.2. S2.2 G3 Lotus nuttallianus Nuttall's lotus Fabaceae annual herb 1 B.1 S1.1 GI Microseris douplasii ssp. small-flowered microseris Asteraceae annual herb 4.2 S3.2 G4T3 platvcarpha Mimulus diffusus Palomar monkeyflower Phrymaceae annual herb 4.3. S3.3 G40 Monardella hypoleuca ssp. lanata felt-leaved monardella Lamiaceae perennial rhizomatous B.2 S2.2 G4T2 herb Myosurus minimus ssp. anus little mousetail . Ranunculaceae annual herb 3.1 S2.2 G5T2Q Nama stenocarpum mud nama Hydrophyllaceae annual / perennial herb 2.2 S1S2 G4G5 Navarretia fossalis Morans nosegay Polemoniaceae annual herb . 1 B.i Si Gi Nemacaulis denudata var. coast woolly-heads Polygonaceae annual herb 1 B.2 S2.2 G3G413? denudata Nemacaulis denudata var. ciracilis slender cottonheads Polygonaceae annual herb 2.2 S2 G3G4T3? http://www.rareplants.cnps.org/result.html?adv=t&quad=33 117B3 :9 . . 6/14/2011 CNPS Inventory Results Page 3 of 3 Nolina cismontana chaparral nolina Ruscaceae. perennial evergreen 1 B.2 G2shrub S2 Orcuttia californica California Orcutt grass Poaceae annual herb 1 BA S2.1 G2 Orobanche parishii ssp. brachvloba short-lobed broornrape Orobànchaceae perennial herb (parasitic) 4.2 - S3.2 G4?T3 Phacelia ramosissima var. south coast branching Boraginaceae perennial herb 4.2 S3.2 G5?T3 austrolitoralis phacelia Phacelia stellaris Brand's star phacelia Hydrophyllaceae annual herb 1 B.i Si G2? -Pinus torreyana ssp. torrevana Torrey pine Pinaceae perennial evergreen tree B.2 81 .2 G1 T1 Psilocarphus brevissimus var. multiflorus Delta woolly-marbles Asteraceae annual herb 4.2 . S3 G413 Quercus dumosa Nuttall's scrub oak Fagaceae perennial evergreen 1 B S1.1 . G1 G2 Quercus encielmannii Engelmann oak Fagaceae perennial deciduous 4.2 . S3.2 G3 tree Stemodia durantifolia purple stemodia Plantaginaceae perennial herb 2.1 S2.1? G5 Suaeda esteroa estuary seablite Chenopodiaceae perennial herb 1B.2 S2 G3 Tetracoccus dioicus Parry's tetracoccus Euphorbiaceae perennial deciduous shrub B.2 S2.2 G3 Viciuiera laciniata San Diego County Asteraceae perennial shrub 4.2 S3.2 G4 viguiera Suggested Citation CaliforniaNative Plant Society (CNPS). 2011. Inventory of Rare and Endangered Plants (online edition, v8-01 a). California Native Plant Society. Sacramento, CA. Accessed on Tuesday, June 14, 2011. Search the inventory Information Contributors Simple Search About the Inventory Jenkins Family Advanced Search About the Rare Plant Program Bilisoly Bequest Grant Glossary - CNPS Home Page California Natural Diversity Database About CNPS The Calflora Database Join CNPS Studio Simple TRC © Copyright 2010 California Native Plant Society. All rights reserved. http://www.rarep1ants.cnps.org/resu1thtml?adv=t&quad=33 117B3 :9 6/14/2011 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA APPENDIX C VASCULAR PLANT SPECIES OBSERVED P:\HCR1102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/1912012) LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA The following vascular plant species were observed in the study area by LSA biologists Jaime Morales and Dan Rosie during the general -reconnaissance survey conducted on May 18, 2011. * Introduced, non-native species Vascular Plant Species Observed Scientific Name Common Name Anacardiaceae Sumac family Malosma laurina Laurel sumac Rhus integrfolia Lemonade berry Apiaceae Carrot family Foeniculum vulgare * Fennel Asteraceae Sunflower family Ambrosia psilostachya Western ragweed Artemisia calfornica California sagebrush Baccharis pilularis Coyote brush Baccharis sa1icfolia Mule fat Carduus pycnocephalus* Italian Thistle Centaurea melitensis * Tocalote Chaenactis glabriuscula Yellow pincushion Conyza canadensis Canadian horseweed Deinandrafasciculata Fascicled tarweed Eriophyllum confertJ7orum Golden yarrow Hedypnois cretica * S Crete weed 1-leterotheca grandflora Telegraph weed Isocoma menziesii var. vernonioides Coastal goldenbush Lactuca serriola * Prickly lettuce Picris echioides * Bristly ox-tongue Pseudognaphalium calfornicum California rabbit-tobacco Pseudognaphalium luteoalbum * Jersey cudweed Sonchus asper* Prickly sow-thistle Sonchus oleraceus* Common sow thistle Stephanomeria virgata Tall wreath-plant Boraginaceae Borage family Amsinckia douglasiana Fiddleneck Heliotropium curassavicum Salt heliotrope Brassicaceae Mustard family Hirschfeldia incana * Shortpod mustard Chenopodiaceae Saltbush family Chenopodium album* Lamb's quarters P:\I-ICR1 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Reporidoc (I/I9t2012) C- 1 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Vascular Plant Species Observed Scientific Name Common Name Euphorbiaceae Spurge family Ricinus communis * Castor bean Fabaceae Pea family Lotus scoparius Deerweed Lupinus succulentus Arroyo lupine Melilotus indicus * Annual yellow sweetciover Gentianaceae Gentian family Zeitnera venusta Canchalagua Geraniaceae Geranium family Erodium botrys * - Longbeak stork's bill Erodium cicutarium Redstem stork's bill Lamiaceae Mint family Salvia apiana White sage Salvia mellifera 0 Black sage Malvaceae Mallow family Malacothamnus dens fiorus Many-flowered bushmallow Polemoniaceae Phlox family Navarretia hamata Hooked pincushionplant Polygonaceae Buckwheat family Eriogonumfasciculatum California buckwheat Rumex crisp us * Curly dock Primulaceace Primrose family Anagallis arvensis * Scarlet pimpernel Salicaceae Willow family Salix gooddingii Goodding's willow Salix lasiolepis Arroyo willow Tamaricaceae Tamarisk family Tamarix ramosissima* Mediterranean tamarisk Arecaceae Palm family Was hingtonia robusta * Mexican fan palm Cyperaceae Sedge family Cyperus eragrostis Tall flatsedge Scirpus•sp. Bulrush Poaceae Grass family Avena barbata* Slender wild oat Bromus hOrdeaceus* Soft chess Bromus madritensis ssp. rubens* Red brome P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) C-2 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Vascular Plant Species Observed Scientific Name Common Name Digitaria sanguinalis * 0 Crab grass Distichlis spicata Saltgrass Hordeum murinum * Foxtail barley Polypogon monspeliensis * Rabbitfoot grass Vulpia myuros * Rat-tail fescue Taxonomy and scientific nomenclature conform to Hickman (1993). Common names for each taxa generally conform to Roberts (1998), although Abrams (1923, 1944, 1951) and Abrams and Ferris (1960) are used, particularly when species specific common names are not identified in Roberts (1998). P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (111912012) C-3 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA APPENDIX D WILDLIFE SPECIES OBSERVED P:\HCR1102 - Calavera Dam Routine Maintenance\.8i0 Report\Final_Biological Resources Report.doc (1/19/2012) LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA This is a list of the conspicuous aerial insects, bony fishes, amphibians, reptiles, birds, and mammals noted in the study area by LSA biologists Jaime Morales and Dan Rosie during the general reconnaissance survey conducted on May 18, 2011. Presence may be noted if .a species is seen or heard, Or identified by the presence of tracks, scat, or other signs.. Wildlife Species Observed Scientific Name Common Name LEPIDOPTER.A BUTTERFLIES AND MOTHS Pieridae Sulphers and Whites Subfamily Pierinae Whites Pontia protodice Common (checkered) white AYES BIRDS Odontophoridae New World Quail Callipepla ca1fornica California quail Phalacrocoracidae Cormorants Phalacrocorax auritus Double-crested cormorant Columbidae Pigeons and Doves Zenaida macroura Mourning dove Trochilidae Hummingbirds Calypte anna Anna's hummingbird Corvidae Crows and Ravens Corvus brachyrhynchos American crow Corvus corax Common raven Timaliidae Babblers Chamaeafasciata Wrentit Parulidae Wood Warblers Geothlypis trichas Common yellowthroat Emberizidae Emberizines Pipilo maculatus Spotted towhee Pipilo crissalis California towhee Cardinalidae Cardinals, Grosbeaks and Allies Pheucticus melanocephalus Black-headed grosbeak Icteridae Blackbirds, Orioles and Allies Agelaius phoeniceus Red-winged blackbird Fringillidae Finches Carpodacus mexicanus House finch Carduelis psaltria Lesser goldfinch Callipepla calfornica -- California quail Taxonomy and nomenclature are based on the following. Butterflies: North American Butterfly Association (2001. NABA checklist & English names of North American butterflies, second edition. North American Butterfly Association, Morristown, New Jersey.). Birds: American Ornithologists' Union (1998. The A.O.U. Checklist of North American Birds, seventh edition. American Ornithologists' Union, Washington D.C.; and 2000, 2002, 2003, and 2004 supplements.). P:\}{CR1102 - Calavera Dam Routine Maintenance',Bio Report\Final Biological Resources Report.doc (1/1912012) D-1 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALA VERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA APPENDIX E SPECIAL-STATUS SPECIES SUMMARY TABLE P:\HCRI 102- Calavera DamRoutine Maintenance\Bio ReporAFinal_Biological Resources Reporidoc (1/19/2012) LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Plants Abronia marilima US: - Dune plant in coastal dunes below February— Absent: Suitable habitat CA: - 330 feet elevation; formerly fairly November (coastal dunes) is not Red sand-verbena CRPR: 4 widespread, but habitat has shrunk, (perennial present on the project site. especially in southern California herb) Species was not observed (nearly extirpated). Known during 2011 spring survey. historically from coastal California (including the Channel Islands) from San Luis Obispo County to Baja California. Abronia villosa var. US: - Sandy areas in chaparral and coastal March—August Low: Marginally suitable. aurila CA: SP sage scrub and improbably in desert (annual herb) habitat (sandy area in CRPR: lB dunes or other sandy areas, below . coastal sage scrub) is Chaparral sand 5,300 feet elevation. In California, present on the project site. verbena reported from Riverside, San Diego, Species was not observed Imperial, Los Angeles, and Ventura during 2011 spring survey. Counties. Believed extirpated from Orange County. Also reported from Arizona and Mexico (Baja California). Plants reported from desert communities are likely misidentified. Acanthomintha US: FT Endemic to active vertisol clay soils April—June Absent: Suitable habitat ilicfo1ia ' CA: SE of mesas and valleys within (annual herb) (vertisol clay soils) is not CRPR: lB grasslands, chaparral, coastal scrub, present on the project site San Diego thorn- and vernal pool communities; and species was not mint known from southwestern San observed during-2611 Diego County and Baja California; spring survey. 30 to 3,000 feet elevation. Ado Iphia ca14[ornica US: - Sandy/gravelly to clay soils within December— Low: Suitable habitat CA: SP grasslands, coastal sage scrub, and May (coastal sage scrub) is California adoiphia CRPR: 2 chaparral communities; known from (perennial present on the project site, western San Diego County and Baja deciduous but this perennial shrub California; 50 to 2,400 feet shrub) was not observed during elevation. . .. 2011 spring survey. Ambrosia pumila US: FE Occurs in open habitats in coarse April—October; Low: Marginally suitable CA: SP. substrates near drainages, and in generally non- habitat (open habitat in San Diego ambrosia CRPR: I upland areas on clay slopes or on the flowering coarse. substrates near dry margins of vernal pools. This (perennial drainages) is present on species occurs in a variety of rhizomatous the project site, but was . associations dominated by sparse herb) not observed during 2011 grasslands or marginal wetland spring survey. habitats such as river terraces, pools, and alkali playas. Known populations • in Riverside County are associated - - with silty alkaline soils in open, gently-sloped grasslands Known from western San Diego County, southwestern Riverside County, and - - - • Baja California from 70 to 1,400 feet . • elevation. P:\HCR 1102 - Calavera Dam Routine Maintenance\810 Report\Final_BiologicalResources Report.doc (1/1912012) • E-1 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Arcioslaphylos US: FE Sandy areas in maritime chaparral December— Absent: Suitable habitat glandulosa ssp. CA: SP and coniferous forest, typically on April (maritime chaparral and crassifolia CRPR: lB coastal mesas and ocean bluffs, (evergreen coniferous forest) is not below 1,200 feet elevation. Known shrub) present on the project site. Del Mar manzanita only from San Diego County, Perennial shrub was not California. observed during 2011 spring survey. Arlemisiapalmeri US: - Primarily found in drainages and February— Low: Suitable habitat CA: SP riparian areas in sandy soil within September (riparian areas adjacent to San Diego sagewort CRPR: 4 coastal scrub, chaparral, riparian (biennial or upland scrub) is present on forest, riparian woodland; known perennial the project site, but this from San Diego and Riverside deciduous perennial species was not Counties and Baja California; 50 to shrub) observed during the 2011 3,000 feet elevation. spring survey. Asplenium US: - Rocky sites in chaparral; cismontane February—June Absent: Suitable habitat • vesperlinum CA: - woodland, and coastal scrub. Known (perennial. (rocky sites in coastal CRPR: 4 from Los Angeles, Orange, rhizomatous scrub) is present on the Western spleenwort Riverside, San Bernardino, San herb) project site, but the site is Diego, and Ventura Counties; 590 to below the species known 3280 feet elevation, elevation range; not observed during the 2011 spring survey. Aslragalus tener var. US: FE Moist, sandy depressions of coastal March—May Absent: Suitable habitat till CA: SE dunes and bluffs, or clay terrace, (annual herb) (coastal dunes and bluffs) CRPR: lB below 160 feet elevation. Known to is not present on the Coastal dunes milk- occur only in Monterey County. project site, which is just vetch Believed extirpated from Los above the species known Angeles County. May also be elevation range, and was extirpated from San Diego County. not observed during the 2011 spring survey. .Atriplex coulteri US: - Alkaline or clay soils in ocean bluffs March— Absent: Suitable habitat CA: SP and ridge tops and alkaline low October (alkaline or clay soils) is Coulter's saltbush CRPR: lB places in coastal bluff scrub, coastal (perennial not present on the project dunes, coastal sage scrub, and valley herb) site. Species was not and foothill grasslands below 1,500 observed during the 2011 feet elevation. In California, known spring survey. only from Los Angeles, Orange, Santa Barbara, San Bernardino, San Luis Obispo, Ventura, and San Diego Counties. Also occurs in Mexico. Reports of this species from Riverside County are based on misidentification of Atriplex serenana ssp. davidsonii (The Vascular Plants of Western Riverside County, California. F.M. Roberts et al., 2004). P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/I9t20I2) E-2 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Atriplexpacflca US: - Alkali soils in coastal sage scrub, March— Absent: Suitable habitat CA: SP playas, coastal bluff scrub, coastal October (alkaline soils) is not South Coast CRPR: lB dunes, and chenopod scrub below (annual herb) present on the project site. saltscale 600 feet elevation, and perhaps Species was not observed formerly upto about 1,400 feet in during the 2011 spring Los Angeles County. In California, survey. known from the Channel Islands and mainland Los Angeles, San Diego and Orange Counties. Also occurs in Mexico. Believed extirpated from Ventura County. Reports of this species from Riverside County are based on misidentification of A triplex serenana SSp. davidsonii (The Vascular Plants of Western Riverside County, California. F. M. Roberts et al., 2004). Atriplex serenana US: - Alkaline soils in scrub and April—October Absent: Suitable habitat var. davjdsonii CA: SP herbaceous communities from 30 to (annual herb) (alkaline soils) is not CRPR: lB 1,500 feet elevation. In California, present on the project site. Davidson's saltscale known only from Los Angeles (?), Species was not observed Orange, Riverside, San Diego, San during the 2011 spring Luis Obispo, and Ventura Counties. survey. Believed extirpated from Santa Barbara and perhaps Los Angeles Counties. Also occurs in Mexico. Baccharis vanessae US: FT Sandstone soils in steep, open, rocky August— Absent: Suitable habitat CA: SE areas in chaparral at 200 to 2,400 November (rocky areas in chaparral) Encinitas baccharis CRPR: lB feet elevation. Known only from San (perennial is not present on the Diego County, California. deciduous project site. Perennial shrub) shrub was not observed during 2011 spring survey. Bloomeria US: - Clay soils in chaparral, coastal sage April—May Absent: Suitable habitat clevelandii CA: SP scrub, valley and foothill grassland (perennial (clay soils) is not present CRPR: lB and vernal pools; 200 to 1,500 bulbiferous on the project site. Species San Diego (3,600?) feet elevation. Only known herb) not observed during 2011 goldenstar from San Diego County and Baja spring survey. • California. Brodiaeafilfolia US: FT Often clay, loamy sand, or alkaline March—June Low: Known occurrences CA: SE soils; open grasslands at edges of (perennial within project vicinity; Thread-leaved CRPR: lB vernal pools or floodplains, bulbiferous marginally suitable habitat brodiaea chaparral opening, cismontane herb) (coastal scrub, no clay • woodlands, and coastal scrub. Below . soils) on the project site, 4,000 feet elevation. Los Angeles, but was not observed Orange, Riverside, and San Diego during 2011 spring survey• Counties; known from about 20 and the site is not within a locations. . known population. Focused surveys of the area in 2002 and 2004 were negative. P:\HCRI 102- Calavera Dam Routine Maintenance\13io Report\Final_Biotogical Resources Report.doc (I/I9t20I2) E-3 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Brodiaea orcuuii US: - Clay and some serpentine soils in May—July Low: Marginally suitable CA: SP grasslands near streams or vernal (perennial habitat (grasslands Orcutt's brodiaéa CRPR: lB pools, also known from woodlands, bulbiferous [disturbed areas]) present chaparral, and conifer forest; sea herb) on the project site. Species level to 5,300 feet elevation; was not observed during Orange, Riverside, and San Diego 2011 spring survey. Counties, and Baja California. Camissonia lewisii US: - Sandy or clay areas in coastal scrub, March—June Low: Marginally suitable CA: - grassland, and woodland below (annual herb) habitat (coastal scrub) Lewis' evening- CRPR: 3 1,000 feet elevation. In California present on the project site. primrose known only from Los Angeles and Species was not observed San Diego Counties. Believed during 2011 spring survey. extirpated from Orange County. Also occurs in Mexico. Ceanothus US: - Chaparral in western San Diego December— Absent: Suitable habitat verrucosus CA: SP County and northern Baja May (chaparral) is not present CRPR: 2 California; sea level to 1,250 feet (perennial on the project site. Wart-stemmed elevation. shrub) Perennial shrub was not ceanothus observed during 2011 spring survey. Centromadiaparryi US: - In vernally wet areas such as edges May— Low: Potentially suitable ssp. ausiralis CA: SP of marshes and vernal pools, at November habitat is present on the CRPR: lB edges of roads and trails, and in (annual herb) project site. Species was Southern tarplant other areas of compacted, poorly not observed during 2011 drained, or alkaline soils where spring survey. competition from other plants is limited, often due to disturbance, below 1,400 feet elevation. In California, known only from Santa Barbara, Ventura, Los Angeles, Orange and San Diego Counties. Also occurs in Mexico. Cenfromadia US: - Alkaline areas inchenopod scrub, April— Absent: Marginally pungens ssp. laevis CA: SP meadows, playas, riparian November suitable habitat (riparian CRPR: lB woodland, valley and foothill (annual herb) woodland) is present on Smooth tarplant grassland below 1,600 feet the project site; species elevation. Known from Riverside was not observed during and San Bernardino Counties, the 2011 spring survey. extirpated from San Diego County. Extirpated from San Diego County. Chaenaciis US: - Sandy areas of coastal bluff scrub January— Absent: Suitable habitat glabriuscula var. CA: SP and coastal sand dunes at elevations August (coastal bluff and dunes) is orcuuiana CRPR: lB from 10 to 300 feet. Known from (annual herb) not present on the project Los Angeles, Orange, San Diego, site. Species was not Orcutt's pincushion and Ventura Counties, and Baja observed during the 2011 California. spring survey. P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/I9t2012) E-4 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD CALIFORNIA Special Interest Species Summary. Table for Potential Occurrence Activity' Species Status Habitat and Distribution Period Occurrence Probability Chorizanthe US: FE Sandy soils in coastal scrub, March—May Low: Marginally suitable orcuuiana CA: SE chaparral, and closed-cone ' (annual herb) habitat (sandy soils in CRPR: I coniferous forest at 10 to 410 feet coastal scrub) is present on Orcutt's spineflower elevation. Known only from San - the project site. Species Diego County, California. was not observed during 2011 spring survey. Chorizanthe US: - Clay soils in chaparral, coastal April—July Low: Marginally suitable polygonoides var. CA: SP scrub, meadows and seeps, valley (annual herb) habitat (coastal scrub) is longispina CRPR: I and foothill grassland at 100 to present on the project site. 4,800 feet elevation. Occurs in , Species was not observed Long-spined Riverside and San Diego Counties. during 2011 spring survey. spineflower Cistanthe maritima US: - , Sea bluffs and sandy sites in coastal February— Low: Marginally suitable CA: - bluff scrub, coastal scrub, and valley August habitat (coastal scrub) is Seaside calandrinia CRPR: 4 and foothill grassland from 15 to (perennial present on the project site. 1,000 feet in elevation. Known from herb) Perennial species was not Los Angeles, Orange, Santa observed during 2011 Barbara, San Diego, and Ventura spring survey. Counties, including the Channel Islands, and Baja California. Clarkia delicata US: - Often gabbroic soils in chaparral and April—June Absent: Suitable habitat CA: SP cismontane woodland at 830 to (annual herb) (gabbroic soils) is not Delicate clarkia CRPR: lB 3,280 feet elevation. Known only present on the project site, from San Diego County, California. which is also below the species known elevation range. Species was not observed during 2011 spring survey. Comarostaphylis US: - Evergreen shrub found in chaparral April—June Absent: Suitable habitat divers fo1ia ssp. CA: SP at elevations from 100 to 1,800 feet. (year-round (chaparral) is not present divers folia CRPR: lB Known from Orange, Riverside, and evergreen on the project site. San Diego Counties, and Baja shrub) Perennial shrub was not Summer holly California. observed during 2011 spring survey. Convolvulus US: - Wet clay and serpentine seeps and March—July Absent: Suitable habitat simulans 'CA: - ridges in chaparral, coastal scrub, (annual herb) (clay/seeps) is not present CRPR: 4 and valley and foothill grassland - on the project Site. Species Small-flowering ' from 100 to 2,300 feet elevation.' , was not observed during morning glory Known from Contra Costa County 2011 spring survey. to Baja California, 'including the Channel Islands. Rare in Southern California. Corel hrogyne US: - Disturbed sites within coastal scrub, June— Low: Suitable habitat filaginfolia var. ' CA: SP coastal bluff scrub, and chaparral September (coastal scrub) is present incana CRPR: lB communities; known from coastal (perennial on the project site. San Diego County and Baja herb) However, perennial San Diego sand , California; 10 to 400 feet elevation, species was not observed aster during 2011 spring survey. P:\HCR1102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (Il19t2012) E-5 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period' Occurrence Probability Coreihrogyne US: - Coastal bluff scrub, chaparral May— Low: Suitable habitat fi1aginfolia var. CA: SF (maritime chaparral, openings), and September (coastal scrub) is present 1in,f'o1ia CRPR: lB coastal scrub. Known from coastal (perennial on the project site. San Diego County and Baja herb) However, perennial Del Mar Mesa sand California; 50 to 495 feet elevation, species was not observed aster ' during 2011 spring survey. Deinandra US: - Usually in vernally mesic sites, April— Low: Marginally suitable pant culala CA: - sometimes in vernal pools or on November habitat (coastal scrub) is CRPR: 4 mima mounds near them, in coastal (annual herb) present on the project site. Paniculate tarplant scrub and valley and foothill Species was not observed grassland. Known from Orange, during 2011 spring survey. Riverside, San Bernardino, and San Diego Counties; 80 to 3,100 fee elevation. Dichondra US: - Mostly dry sandy banks in scrub or January—July Moderate: Suitable occidenialis CA: - under trees; coastal sage scrub, (perennial habitat (coastal sage CRPR: 4 chaparral, oak woodland. Coastal rhizomatous scrub) is present on the Western dichondra Los Angeles (?), Mann (?), Santa herb) project site. Species was Barbara, Ventura, Orange, and San not observed during 2011 Diego Counties, including the ,spring survey. Channel Islands, and Baja California; 200 to 1,700 feet elevation. Dudleya blochmaniae US: - Dry rocky or stony places below April—June Low: Marginally suitable ssp. blochmaniae CA: SP 1,500 feet, often on serpentine (perennial habitat (coastal sage CRPR: I B annual grassland and coastal sage herb) scrub) is present on the Blochman's dudleya scrub. Coastal areas from San Luis , project site. Species was Obispo County south to Baja not observed during 201.1 California. spring survey. Dudleya multicaulis US: - Heavy, often clay soils or around April—July Low: Marginally suitable CA: SF granitic outcrops in chaparral, (perennial habitat (coastal sage Many-stemmed CRPR: lB coastal sage scrub, and grassland herb) scrub) is present on the dudleya ' below 2,600 feet elevation. Known ' project site. Species was only from Los Angeles, Orange, . not observed during 2011 Riverside, San Bernardino, and San spring survey. Diego Counties. Dudleya variegala US: - In rocky or clay soils within April—June Low: Marginally suitable CA: SP chaparral, coastal scrub, cismontane (perennial habitat (coastal scrub) is Variegated dudleya CRPR: lB woodland, valley and foothill herb) present on the project site. grassland, and margins of vernal Species was not observed pools; known from western San during 2011 spring survey. Diego County and Baja California; 10 to 1,900 feet elevation. Dudleya viscida US: - Rocky areas in coastal bluff scrub, May—June Low: Suitable habitat CA: SP chaparral, coastal sage scrub; below (perennial (coastal sage scrub) is Sticky dudleya ' CRPR: lB 1,800 feet elevation. Known from herb) present on the project site. Orange, Riverside, and San Diego This perennial species was Counties, not observed during 2011 spring survey. P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_siological Resources Report.doc (1/I9t20I2) E-6 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species . Status Habitat and Distribution Period Occurrence Probability Eryngium US: FE Vernal pools at 50 to 2,035 feet April—June Absent: Suitable habitat aristulatum var. CA: SE elevation. In California, known only (annual! (vernal pools) is not parishii CRPR: I from Riverside and San Diego perennial herb) present on the project site, Counties. In Riverside County, this Species was not observed San Diego button- species is known only from the during 2011 spring survey. celery Santa Rosa Plateaü Also known from Baja California. Eryngium US: - Vernally mesic sites in coastal bluff April—June Absent: Suitable habitat pendlelonénse CA: SP scrub, valley and foothill grassland, (perennial (vernally mesic sites) is CRPR: lB and vernal pools at 50 to 360 feet herb) not present on the project Pendleton button- elevation. Known only from San site. Species was not celery Diego County. observed during 2011 - spring survey. Eiysimum, US: - Sandy openings in chapirral February—June Low: Marginally suitable ammophilum CA: SP (maritime), coastal dunes, and (perennial habitat (coastal scrub) is CRPR: lB coastal scrub below 200 (430?) feet herb) present on the project site. Sand-loving elevation. Known from Monterey, Species was not observed wallflower Santa Barbara, Santa Cruz, San during 2011 spring survey. Diego, and San Mateo Counties, and Santa Roa Island. Euphorbia misera US: - ' Rocky sites within coastal bluff December— Low: Marginally suitable CA: SP scrub, coastal sage scrub, and August , habitat (coastal sage 'Cliff spurge CRPR: 2 Mojavean desert scrub; 100 to 1,650 (perennial scrub) is present on the feet elevation. Known from the , shrub) project site; however, this Channel Islands, coastal Orange and perennial shrub was not San Diego Counties, Riverside observed during 2011 County deserts, 'and Baja California. spring survey. Ferocacius US: - Often on exposed, level or south- May—June Low: Suitable habitat viridescens CA: SP. facing slopes within chaparral, (perennial (coastal scrub) is present CRPR: 2 coastal scrub, and valley and foothill stem on the project site; San Diego barrel -' grasslands. Known from succulent) however, this perennial cactus southwestern San Diego County and species (albeit, often Baja California; 10 to 1,500 feet , ' inconspicuous) was not elevation. ' observed during 2011 spring survey. - Harpagonella' . US: - Clay soils in openings in coastal March—May Absent: Suitable habitat palmeri CA: SP sage scrub, juniper woodland, and (annual herb) (clay soils) is not present CRPR: 4 grassland; below 3,130 feet , , , on the project site. Species Palmer's elevation. In California, known only, was not observed during grapplinghook from Orange, Los Angeles, , 2011 spring survey. Riverside, and San Diego Counties and the Channel Islands. Also known from Arizona, and Baja . California and Sonora, Mexico. Hazardia orcuuii US: FC Often found on clay soils in the August— Absent: Suitable habitat CA: ST grassy edges of chaparral and October (clay soils) is not present Orcutt's'hazardia CRPR: I coastal scrub below 280 feet (perennial on the project site. This elevation. Known only from Lux evergreen - perennial shrub was not Canyon (Encinitas/Rancho Santa Fe shrub) observed during 2011 area) of San Diego County, spring survey. California. P:'I-{CRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biolaaical Resources Report.doc (I/19t2012) - - E-7 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 - CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Heteroiheca US: - Sandy sites in coastal dunes, coastal March— Low: Marginally suitable sessi1/lora ssp. CA: SP scrub, and chaparral (coastal) below December. habitat (coastal sage sessi1/1ora CRPR: lB 4,015 feet elevation. Known only (perennial scrub) is present on the from San Diego County (primarily herb) project site. Perennial Beach goldenaster coastal) and Baja California. species was not observed Presumed extirpated from Santa during 2011 spring survey. Barbara County. Holocarpha virgala US: - Found in chaparral, coastal scrub, May— Moderate: Suitable ssp. elongata CA: - valley and foothill grassland, and November habitat (coastal scrub) is CRPR: 4 cismontane woodland; 200 to 3,600 (annual herb) present on the project site. Graceful tarplant feet elevation. Known from Orange, Species was not observed Riverside, and San Diego Counties. during 2011 spring survey. Horkelia iruncata 'US: - Clay and gabbroic soils in chaparral May—June Absent: Suitable habitat CA: SP and cismontane woodland; 1,000 to (perennial (clay or gabbroic soils) is Ramona horkelia CRPR: lB 4,900 feet elevation. Known from herb) not present on the project Peninsular Ranges in San Diego site. Perennial species was County and Baja California. not observed during 2011 spring survey. Isocoma menziesii US: - Sandy soils, often in disturbed areas, April— Absent: Suitable habitat var. decumbens CA: SP in coastal scrub, and chaparral from November (coastal scrub) is present CRPR: lB 30 to 440 feet elevation. Known (perennial on the project site; Decumbent , from mainland Orange and San shrub) however, this perennial goldenbush Diego Counties and from San shrub was not observed Clemente and Santa Catalina Islands during 2011 spring survey. in California. Also occurs in Baja The more common California. ' ' variety, I. m. var. vernonioides, was observed. Iva hayesiana US: - River washes, marshes, swamps, and April— Low: Suitable habitat CA: sp playas; known from western San September (marshes) is present on the San Diego marsh- CRPR: 2 Diego County and Baja California; (perennial project site; however, this elder 30 to 1,650 feet elevation, herb) perennial species was not observed during 2011 spring survey. Juncus acuws ssp. US: - Moist, saline places in salt marshes, May—June Low: Suitable habitat leopoldii CA: - alkaline seeps, and coastal dunes (perennial (marshes) is present on the - CRPR: 4 (mesic sites); 10 to 2,950 feet rhizomatous project site; however, this Southwestern spiny elevation. Known' from Imperial (?), herb) - perennial species was not rush Los Angeles, Orange, Santa observed during 2011 Barbara, San Diego, San Luis spring survey. Obispo, and Ventura Counties, - Arizona, and Baja California. P:\HCRI 102'- Calavera Dam Routine Maintenancé\Bio Report\Final Biological Resources Report.doc (1/19t2012) E-8 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Lasthenia glabrata US: - Usually alkaline soils in marshes, February—June Absent: Suitable habitat ssp. coulieri CA: SP swamps (coastal salt), playas, vernal (annual herb) (alkaline soils/vernal CRPR: lB pools, and valley and foothill pools) is not present on the Coulter's goldfields grassland below 4,600 feet project site. Species not elevation. Known from Colusa, observed during 2011 Merced, Tulare (?), Orange, spring survey. Riverside, Santa Barbara, San Diego, San Luis Obispo, and Ventura Counties. Believed extirpated from Kern, Los Angeles, and San Bernardino Counties. Also occurs in Mexico. Lepidium virginicum US: - Dry soils in coastal sage scrub and January—July Moderate: Suitable var. robinsonii CA: SP chaparral, typically below 1,600 (annual herb) habitat (coastal sage CRPR: lB (2,900) feet elevation. In California, scrub) is present on the Robinson's pepper- known from Los Angeles, Orange, project site. Species was grass Riverside, Santa Barbara, San not observed during 2011 Bernardino, and San Diego spring survey. Counties, and the Channel Islands. Also occurs in Baja California. Leptosyne maritima US: -- Occurs on a variety of soil types, March—May Low: Marginally suitable CA: SP including sandstone in coastal scrub (perennial habitat (coastal scrub) is Sea dahlia CRPR: 2 and coastal bluff scrub; 15 to 500 herb) present on the project site; feet elevation. Known only from however, this perennial coastal San Diego County and Baja . species was not observed California . during 2011 spring survey. Lotus nutiallianus US: - On coastal sand dunes or within March—June Absent: Suitable habitat CA: SP coastal scrub in sandy areas below (annual herb) (sand dunes) is not present Nuttall's lotus CRPR: lB 35 feet elevation. Known from on the project site. Species coastal San Diego County and Baja was not observed during California. 2011 spring survey. Microseris douglasii US: - Alkaline or clay soils along river March—May Absent: Suitable habitat ssp. platycarpha CA: - bottoms in cismontane woodland, (annual herb) (alkaline or clay soils) is CRPR: 4 valley and foothill grassland, coastal not present on the project Small-flowered scrub, and vernal pools; 50 to 3,510 site. Species was not microseris feet elevation. Known from Los observed during 2011 Angeles, Orange, Riverside, and San spring survey. Diego Counties, San Clemente and Santa Catalina Islands, and Baja California. Mimulus dffusus US: - Sandy or gravelly soils in chaparral April—June Absent: Suitable habitat CA: - and lower montane coniferous (annual herb) (chaparral or coniferous Palomar. CRPR: 4 forest; 4,000 to 6,000 feet elevation. .' forest) is not present on monkeyflower Known from Orange, Riverside, and the project site and the site San Diego Counties, and Baja is below the species California. . known elevation range; not observed during the 2011 spring survey. P:\HCRI 102 - Calavera Darn Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) E-9 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Monardella US: - Chaparral and cismontane June—August Absent: Suitable habitat hypoleuca ssp. lanata CA: SP woodland; 1,000 to 3,900 feet (perennial (chaparral or cismontane CRPR: lB elevation. Known from Peninsular rhizomatous woodland) is not present Felt-leaved Ranges in Orange and San Diego herb) on the project site and the monardella Counties and from northern Baja site is below the species California. known elevation range; not observed during the 2011 spring survey. Myosurus minimus US: - Alkaline areas in vernal pools at 20 March—June Absent: Suitable habitat ssp. apus CA: SP to 70 to 2,100 feet elevation. Known (annual herb) (vernal pools) is not CRPR: 3 only from the Central Valley of present on the project site. Little mousetail California and the coastal and inland Species was not observed areas of Southern California. during 2011 spring survey. Nama slenocarpum US: - Lakeshores, riverbanks, and similar January—July Moderate: Suitable CA: SP intermittently wet areas at 5 to 20 to (annual or habitat (lakeshore) is Mud nama CRPR: 2 1,600 feet elevation. Known in perennial herb) present on the project site; California from San Diego, Orange, however, this species was Riverside, and Kings Counties, and not observed during 2011 San Clemente Island. Believed spring survey. extirpated from Los Angeles and Imperial Counties. Known also from Baja California and Arizona. Navarretiafossalis US: FT Vernal pools, chenopod scrub, April—June Absent: Suitable habitat CA: SP marshes and swamps playas. Known (annual herb) (vernal pools) is not Spreading CRPR: lB from Los Angeles, Riverside, San present on the project site. navarretia Luis Obispo, and San Diego Species was not observed Counties, and Baja California; 100 during 2011 spring survey. to 4,300 feet elevation. Nemacaulis denudata US: - Sandy places such as coastal dunes April— Absent: Suitable habitat var. denudala CA: SP below 300 feet elevation. Known in September (coastal dunes) is not CRPR: lB California from Orange, Los (annual herb) present on the project site. Coast woolly-heads Angeles, and San Diego Counties. Species was not observed Believed extirpated from Santa during 2011 spring survey. Catalina Island; Also occurs in Baja California. Nemacaulis denudata US: - Coastal or desert dunes, sandy March—May Absent: Suitable habitat var. gracilis CA: SP mesquite hummocks, or similar (annual herb) (dunes) is not present on CRPR: 2 sandy sites at -160 to 1,800 feet the project site. Species Slender cottonheads elevation. Known from Imperial, was not observed during Riverside, San Bernardino, and San 2011 spring survey. Diego Counties in California, and Arizona and Mexico. Nolinacismoniana US: - Evergreen shrub found in sandstone May—July Absent: Suitable habitat CA: SP or gabbroic soils in chaparral and (perennial (sandstone or gabbroic Chaparral nolina CRPR: lB coastal sage scrub; 500 to 4,200 feet evergreen soils) is not present on the elevation. Known from Los Angeles, shrub) project site and the site is Orange, San Diego, and Ventura below the species known Counties. elevation range. Perennial shrub was not observed during 2011 spring survey. P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/1912012) E-10 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Orcunia ca1fornica US: FE Vernal pools from 50 to 2,200 feet April—August Absent: Suitable habitat CA: SE elevation. In California, known from (annual herb) (vernal pools) is not California Orcutt CRPR: I Los Angeles, Ventura, Riverside, present on the project site. grass and San Diego Counties. Also Species was not observed occurs in Baja California. during 2011 spring survey. Orobancheparishii US: - Sandy soils near beaches in coastal April—October Absent: Suitable habitat ssp. brachyloba CA: SP bluff scrub, coastal dunes, and (parasitic (sandy soils near beaches) CRPR: 4 coastal scrub; 10 to 560.feet perennial herb) is not present on the Short-lobed elevation. Known from Los Angeles, project site. Species was broomrape Santa Barbara, San Diego, San Luis not observed during 2011 Obispo, and Ventura Counties, the spring survey. Channel Islands, and Baja California. Phacelia US: - Sandy, sometimes rocky sites in March—August Low: Marginally suitable ramosissima var. CA: - chaparral, coastal scrub, coastal (perennial habitat (coastal scrub) is austrolitoralis CRPR: 4 dunes, and coastal salt marsh; 20 to herb) present on the project site; 1,000 feet elevation. Known from however, this perennial South coast Los Angeles, Monterey (?), Orange, species was not observed branching phacelia Santa Barbara, San Diego, San Luis . during 2011 spring survey. Obispo (?), and Ventura Counties. Also occurs in Baja California. Phacelia stellaris US: FC Dunes and sandy openings in coastal March—June Low: Marginally suitable CA: SP scrub communities at 20 to 1,300 (annual herb) habitat (coastal scrub) is Brand's star CRPR: lB feet elevation. Known only from San present on the project site. phacelia Diego County and Baja California. Species was not observed Believed extirpated from Lbs during 2011 spring survey. Angeles County. Pinus lorreyana ssp. US: - On dry, sandstone slopes in closed- Perennial Absent; Suitable habitat torreyàna CA: SP cone coniferous forest and chaparral; evergreen tree (coniferous forest and CRPR: lB 230 to 530 feet elevation. Known chaparral) is not present Torrey pine from Santa Barbara and San Diego on the project site. This Counties. perennial tree was not observed during 2011 spring survey. Psilocarphus US: - Found in vernal pools; also on flats. May—June Absent: Suitable habitat brevissimus var. CA: - Known from Alameda, Napa, Santa (annual herb) (vernal pools) is not mulu/lorus CRPR: 4 Clara, San Diego, San Joaquin, present on the project site. Solano, Stanislaus, and Yolo This species was not Delta woolly- Counties; 30 to 1,650 feet elevation, observed during 2011 marbles spring survey. Quercus dumosa US: - On sandy and clay loam soils near February— Absent: Suitable habitat CA: SP the coast within closed-cone August (coastal scrub) is present Nuttall's scrub oak CRPR: lB coniferous forest, chaparral, and (perennial On the project site; coastal scrub. Known from western evergreen however, this perennial Orange, Santa Barbara, and San . shrub) shrub was not observed Diego Counties, and Baja during 2011 spring survey. California; 50 to 1,315 feet elevation. P:\}ICRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) E-1 I LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Quercus engelmannii US: - Chaparral, cismontane ',00dland, March—June Absent: Suitable habitat CA: - riparian woodland, and valley and (perennial (chaparral, woodlands, and Engelmann oak CRPR: 4 foothill grasslands; 400 to 4,300 feet deciduous grasslands) is not present - elevation. Known from Los Angeles, tree) ' on the project site; the site Orange, Riverside, and San Diego is below the species Counties, and northern Baja , known elevation range; California. One tree remains on and this perennial tree was Santa Catalina Island. not observed during 2011 spring survey. Stemodia durantfo1ia US: - Wet sand or rocks and drying river January— Absent: Suitable habitat CA: SP beds from 600 to 1,000 feet December (Sonoran desert scrub) is Purple stemodia CRPR: 2 elevation in Sonoran desert scrub. In (perennial not present on the project California, known only from San herb) site; the site is below the Diego County. Believed extirpated . species known elevation from Riverside County. Also occurs range; and this perennial in Texas, Arizona, and Mexico. species was not observed during 2011 spring survey. Suaeda esteroa US: - Coastal salt marshes and swamps May—January Absent: Suitable habitat CA: SP below 15 feet elevation. Occurs (perennial (coastal salt marsh) is not Estuary seablite CRPR: lB along immediate coast from Ventura herb) present on the project site; County to Baja California. Believed the site above the species extirpated from Santa Barbara - - known elevation range; County. and this perennial species I was not observed during 2011 spring survey. Tetracoccus dioicus US: - Dry stony slopes in chaparral and 'April—May Absent: Suitable habitat CA: SP coastal sage scrub. Known from- (perennial (coastal sage scrub) is Parry's tetracoccus CRPR: lB. Orange, Riverside, and San Diego deciduous . present on the project site; Counties, and Baja California; 500 shrub) however, the site is below to 3,300 feet elevation. the species known elevation range, and this perennial shrub was not observed during 2011 spring survey. Viguiera laciniata US: - Slopes and ridges in chaparral and February— Absent: Suitable habitat CA: - coastal scrub. Known from Orange August (coastal sage scrub) is San Diego County CRPR: 4 and San Diego Counties, and (perennial present on the project site; viguiera Mexico; 295 to 2,460 feet elevation, shrub) however, the site is below the species known elevation range, and this - perennial shrub was not observed during 2011 - - spring survey. Invertebrates Tryonia imitator US: - Inhabits coastal lagoons, estuaries, Presumed Absent: Suitable habitat CA: SA and salt marshes, from Sonoma year-round (coastal marshes, lagoons, Mimic tryonia County south to San Diego County. - and estuaries) is not (=California . Found only in permanently present on the project site. brackishwater snail) submerged areas in a variety of - Species was not observed - sediment types; able to withstand a during 2011 spring survey. wide range of salinities P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/I9t20I2) E-12 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT - CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Branchinecia US: FE Small, Shallow (usually less than 1 foot Seasonally Absent: Suitable habitat sandiegonensis CA: SA deep), relatively clear, but following rains (vernal pools) is not unpredictable, vernal pools on coastal in late fall, present on the project site. San Diego fairy terraces. Pools must retain water for a winter and Species was not observed shrimp minimum of 13 days for this species to spring during 2011 spring survey. reproduce (3-8 days for hatching and 10-20 days to reach reproductive maturity). Known from Orange and San Diego Counties, and Baja California. Slreploceplialus US: FE Warm-water vernal pools (i.e., large, Seasonally Absent: Suitable habitat wooloni CA: SA deep pools that retain waier into the following (vernal pools) is not warm season) with low to moderate rains; typically present on the project site. Riverside fairy dissolved solids, in annual grassland January—April Species was not observed Shrimp areas interspersed through chaparral during 2011 spring survey. or coastal sage scrub vegetation. Suitable habitat includes some artificially created or enhanced pools, such as some stock ponds with vernal pool-like hydrology and vegetation. Known from areas within about 50 miles of the coast from Ventura County south to San Diego County and BajaCalifornia. Cicindela senilis US: - Inhabits marine shoreline, from Presumed Absent: Suitable habitat frosli CA: SA central California coast south to salt spring—fall (marine shoreline, salt - marshes of San Diego, also found at ' marshes) is not present on Senile tiger beetle Lake Elsinore. Inhabits dark-colored , the project site. Species mud in the lower zone and dried salt was not observed during pans in the upper zone. 2011 spring.survey. Lycaena hermes US: - Endemic to San Diego County and May—June Absent: Suitable habitat CA: SA adjacent Baja California. Restricted (Rhamnus crocea) is not Hermes copper to the vicinity of the host plant,, present on the project site. • Rhamnus crocea. ' Species was not observed during 2011 spring survey. Danausplexippus US: - ' In California, winier roosts are September— 'Absent: Suitable habitat (wintering sites) CA: SA located along the coast north to the March (wind-protected tree San Francisco Bay area in wind- ' ' - groves) is not present on Monarch butterfly protected tree groves (eucalyptus, ' the project site. Species Monterey pine, cypress) with nectar ' was not observed during and water sources nearby. 2011 spring survey. Fish Gila orcullii US: - Perennial streams or intermittent Year-round Absent: Suitable habitat CA: SSC streams with permanent pools; slow. (perennial or intermittent Arroyo chub * water sections of streams with thud streams) is not present on or sand substrates; spawning occurs - the project site. Species in pools. Native to Los Angeles, San ' ' was not observed during Gabriel, San Luis Rey, Santa Ana, 2011 spring survey. and Santa Margarita River systems; introduced in Santa Ynez, Santa Maria, Cuyama, and Mojave River systems and smaller coastal streams. P:\HCR 1102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biológical Resources Report.doc (1/19/2012) E-13 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Oécurrence Activity Species - Status Habitat and Distribution Period Occurrence Probability Eucyclogobius US: FE Brackish water habitats along the Year-round Absent: Suitable habitat newberryi CA: SSC California coast from Agua (brackish waters) is not Hedionda Lagoon (San Diego present on the project site. Tidewater goby . County) to the mouth of the Smith Species was not observed River (Del Norte County). Found in during 2011 spring survey. shallow lagoons and lower stream reaches. Amphibians Spea hammondu US: - Grasslands and other relatively open October—April Low: Marginally suitable CA: SSC habitats; requires pools (persisting (following habitat (open areas) is Western spadefoot for at least three weeks) for onset of winter present on the project site. breeding; burrows in loose soils rains) Species was not observed - during dry season. Occurs in the . during 2011 spring survey. Central Valley and adjacent foothills, the non-desert areas of southern California, and in northwestern Baja California. Anaxyrus calfornicus US: FE Washes and arroyos with open March—July Absent: Suitable breeding CA: SSC water; sand or gravel beds; for habitat (washes and Arroyo toad breeding, pools with sparse canopy. arroyos) is not present on Coastal and a few desert streams or near the project site. from Monterey County to Baja Species was not observed California.- during2011springsurvey. Reptiles Emys marmorala US: - Inhabits permanent or nearly Year-round - Moderate: Suitable CA: SSC permanent water below 6,000 feet with reduced habitat (permanent water Western pond turtle from western Washington (at least activity source; Lake Calavera) is - formerly), west of the Sierra- -November— present on the project site. - - Cascade crest, south to north- - - March Has been'detected during - - western Baja California. Absent focused surveys. Not - - from desert regions, except in the likely to be adversely - Mojave Desert along the Mojave affected by project River and its tributaries. Requires activities. Species was not basking sites such as partially observed during 2011 submerged logs, rocks, or open mud spring survey. - banks. Coleonyx variegalus US: - Chaparral, coastal sage, and desert Warmer Low: Marginally suitable abboui CA: SA habitats (often with rocks) from months habitat (coastal sage) - southwestern California to northern suitable habitat is present San Diego banded Baja California Sur. - on the project site. Species gecko - was not observed during - . 2011 spring survey. Phrynosoma US: - Wide variety of habitats including April—July Moderate: Suitable blainvillii CA: SSC coastal sage scrub, grassland, and with reduced habitat (coastal sage - - riparian woodland; typically on or activity - scrub) is present on the Blainville's horned near loose sandy soils; coastal and August— - project site. Species was lizard inland areas from Ventura County to October not observed during 2011 - - Baja California. - spring survey. P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Finat_Biological Resources Report.doc (1/19/2012) - E- 14 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA Special Interest Species Summary Table for Potential Occurrence. Activity Species Status Habitat and Distribution Period Occurrence Probability Plesliodon US: - Occurs in variety of plant Diurnal. Moderate: Suitable ski itonianus CA: SSC communities including coastal sage Activity is habitat (coastal sage inlerparietalis . scrub, mesic chaparral, oak bimodal; early scrub) is present on the woodlands, pinyon-juniper, and spring—early project site. Species was Coronado Island riparian woodlands to pine forests. fall not observed during 2011 skink Found west of the deserts from spring survey. Riverside County to Baja California. Aspidoscelis US: - Prefers washes and other sandy March—July High: Suitable habitat hyperythra CA: SSC areas with patches of brush and with reduced (coastal sage scrub) is rocks, in chaparral, coastal sage activity present on the project site. Orange-throated scrub, juniper woodland, and oak August— Species was not observed whiptail woodland from sea level to 3,000 October . during 2011 spring survey; feet elevation. Perennial plants however. required. Occurs in Riverside, Orange, San Diego Counties west of the crest of the Peninsular Ranges,. in extreme southern San Bernardino County near Colton, and in Baja California. Aspidoscelis tigris US: - Wide variety of habitats including April—August • High: Suitable habitat slejnegeri CA: SA coastal sage scrub, sparse grassland, (coastal sage scrub) is and riparian woodland; coastal and present on the project site. Coastal whiptail inland valleys and foothills; Ventura Species was not observed County to Baja California. during 2011 spring survey. Annie/la pulchra US: - Fossorial. Inhabits loose soil and Year-round Low: Marginally suitable pulchra. CA: SSC humus from cential California to habitat (loose soils) is northern Baja California. present on the project site. Silvery legless lizard . . Species was not observed during 2011 spring survey. Charina frivirgata US: - In rocky areas in chaparral or scrub Nocturnal. Moderate; Suitable CA: SA habitats or adjacent oak woodland; Rarely active habitat (coastal sage Rosy boa also in rocky riparian areas. Found during day. scrub) is present on the - from southern California and Active project site. Species was western Arizona south to Sonora and between April not observed during 2011 Baja California Sur. and September spring survey. Diadophispunctatus US: - Under cover of rocks, wood, bark, Diurnal. Moderate: Suitable sim i/is CA: SA boards, and other surface debris in a Crepuscular habitat (moist areas) is variety of habitats. Prefers moist and nocturnal present on the project site. San Diego ringneck habitats from San Diego County to during warmer Species was not observed snake northwestern Baja California. periods during 2011 spring survey. Salvadora hexalepis US: - Coastal chaparral, washes, sandy Active Moderate: Suitable virgullea CA: SSC flats, and rocky areas from San Luis diurnally habitat (rocky areas) is Obispo County to northwestern Baja throughout present on the project site. Coast patch-nosed . California. most of the Species was not observed snake . . year during 2011 spring survey. Thamnophis US: - Highly-aquatic. Only in or near Diurnal year- Moderate: Suitable hammondii CA: SSC permanent sources of water. Streams round habitat (permanent water with rocky beds supporting willows source; Calavera Lake) is Two-striped garter or other riparian vegetation. From present on the project site. snake . Monterey County to northwest Baja Species was not observed California. during 2011 spring survey. P:\HCR 1102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) E715 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence :Activity V Species Status Habitat and Distribution Period Occurrence Probability Thamnophis sirialis US: - Marsh and upland habitats near V Low: Suitable habitat • CA: SSC permanent water with good strips of (permanent water source; South coast garter riparian vegetation in the southern - Calavera Lake) is present snake California coastal plain from on the project site, but this Ventura County to San Diego . subspecies is generally County; sea level to 2,800 feet rare and local. Species was V elevation. V not observed during 2011 - - V spring survey. Crolalus ruber US: - Desert scrub, thornscrub, open Mid-spring High: Suitable habitat CA: SSC chaparral and woodland; occasional through mid- (coastal sage scrub) is Red-diamond in grassland and cultivated areas. fall present on the project site. V rattlesnake , Prefers rocky areas and dense Species was not observed V vegetation. Morongo Valley in San during 2011 spring survey; Bernardino and Riverside Counties however. to the west and south to Baja. California. V Birds Botaurus lentiginosus US: - Nests in freshwater and brackish Year-round Low: Marginally suitable CA: SA marshes across much of North nesting habitat (marsh American bittern V America; winters south to Central vegetation) is present on America. V V the project site. Very local V V in San Diego County. V Species was not observed during 2011 spring survey. Ixobrychus exilis US: - Occurs locally in freshwater marshes Year-round Low: Marginally. suitable (nesting) CA: SSC across much of southern North ' nesting habitat (marsh • America and northern South vegetation) is present on Least bittern America. V the project site. Species V . was not observed during • V V _____________ 2011 spring survey. Ardea herodias. US: - Usually nesti in trees, but also on Moderate: Suitable (rookery site) CA: SA large bushes, poles, reed beds, and nesting habitat is present even on the ground. Frequents a V on the project site. Species Great blue heron wide range of wetland habitats at was not observed during • other times of year. Widespread in 2011 spring survey. North America; winters to northern South America. • V • V Ardea a/ba • US: - Occurs in a wide range of wetland V Moderate: Suitable (rookery site) V - CA: SA habitats in much of the temperate' . nesting habitat is present and tropical zones worldwide. Nests • on the project site. Species Great egret • . primarily in trees. was not observed during • 2011 spring survey. Egret/a (hula US: - Occurs in a wide range of wetland MOderate: Suitable (rookery site) CA: SA • habitats throughout much of the nesting habitat is present Americas. Nests primarily in trees. . on the project site. Species Snowy egret V was not observed during 2011 spring survey. V P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources ReportVdoc (1/19t2012) E-16 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species. Status . Habitat and Distribution Period Occurrence Probability Nycücorax . US: - Occurs in a wide range of wetland Moderate: Suitable nycticorax CA: SA habitats in much of the temperate nesting habitat is present (rookery site) and tropical zones worldwide. Nests on the project site. Species primarily in trees, sometimes in was not observed during Black-crowned urban habitats. 2011 spring survey. night-heron . Plegadis chihi US: - Freshwater wetlands in temperate Year-round Moderate: Suitable (nesting colony) CA: SA and tropical North and South diurnal activity nesting habitat (freshwater America. Usually nests in-emergent marsh, Calavera Lake) is White-faced ibis vegetation or low trees and shrubs present on the project site over shallow water. and nesting activity was reported at Calavera Lake in 2001. Species was not observed during 2011 spring survey. Pandion haliaetus US: - Estuaries, rivers, lakes, and marshes Moderate: Suitable (nesting) CA: SA in much of the temperate and nesting habitat is present tropical world. Nests primarily on on the project site. Species Osprey trees and other structures. was not observed during 2011 spring survey.. Accipiter cooperii US: - Primarily forests and woodlands Year-round Moderate: A limited (nesting) CA: SA throughout North America. Nests in diurnal amount of suitable nesting trees. . habitat (woodlands) is Cooper's hawk present on the project site. Species was not observed during 2011 spring survey. Aquila chrysaezos US: - Generally open country of temperate Year-round Low: Suitable nesting CA: CFP zones worldwide. Uncommon diurnal habitat (rugged Golden eagle . resident in southwestern California. mountainous country) is not present on the project site, but wandering individuals may occasionally visit the site. Species was not observed during 2011 spring survey. Circus cyaneus US: - Open country in the temperate zones Year-round Low: Marginally suitable (nesting) CA: SSC worldwide, in this region from salt . nesting habitat (freshwater grass in desert sinks t6 mountain marsh edges) is present on Northern harrier cienagas. Coastal salt and fresh-• the project site. Species water marsh habitats. Nests and was not observed during forages on ground in shrubby 2011 spring survey. vegetation and grasslands, usually at marsh edge; nest built of a large mound of sticks in wet areas. P:\HCR 1102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) E-17 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Elanus leucurus US: - Open country in South America and Year-round Low: A limited amount of (nesting) CA: CFP southern North America. Open marginally suitable nesting grasslands, meadows, or marshes for habitat (dense-topped White-tailed kite foraging close to isolated, dense- trees) is present on the topped trees for nesting and project site. Species was perching in rolling foothills and not observed during 2011 valley margins with scattered oaks spring survey. and river bottomlands or marshes next to deciduous woodland. Falco columbarius US: - Open country; breeds in the Fall and winter High. Foraging birds can CA: SA Holarctic Region and winters south occur almost anywhere. Merlin to the tropics. Uncommon fall Species was not observed migrant and winter visitor to during 2011 spring survey. southwestern California. Falcoperegrinus US: - Widespread, but scarce and local Year round Moderate. Foraging birds anatum CA: SE, throughout North America. May may visit occasionally. CFP nest on buildings and bridges in Species was not observed American peregrine urban areas, during 2011 spring survey. falcon Laterallus US: - Requires shallow water in salt Year-round Low: Marginally suitable jalnaicensis CA: ST marshes, freshwater marshes, wet habitat (freshwater marsh) coturniculus meadows, or flooded grassy ' is present on the project vegetation. Prefers areas of moist site but the species is California black rail soil vegetated by fine-stemmed believed to be extirpated emergent plants, rushes, grasses, or from San Diego County. sedges, with scattered small pools. Species was not observed Known from coastal California, . during 2011 spring survey. northwestern Baja California, the lower Imperial Valley, and the lower Colorado River Valley of Arizona, California, Baja California, and Sonora. Now extirpated from virtually all of coastal Southern California. Rallus longirostris US: FE Found primarily in coastal salt Year-round, Low: Potentially suitable levipes CA: SE marshes traversed by tidal sloughs, vocalizes at habitat (freshwater marsh) where cordgrass and pickleweed are night, dawn, is present on the project Light-footed clapper the dominant vegetation. Usually and dusk site. Species was not rail requires dense growth of either observed during 2011 pickleweed or cordgrass for nesting spring survey. or escape cover; feeds on mollusks and crustaceans. A few are found in freshwater marshes in coastal southern California. Charadrius US: FT Sandy coastal beaches, lakes, Year-round Absent: Suitable nesting ale.xandrinus nivosus CA: SSC alkaline playas. Needs sandy, habitat (sandy beaches and (nesting; coastal gravelly or friable soils for nesting. lake shores) is not present population) Scattered locations along coast from on the project site. Species Washington to western Mexico. was not observed during Western snowy 2011 spring survey. plover P:\HCR 1102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) E- 18 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Sternula antillarum US: FE Nests along the Coast from San April—October Absent: Suitable nesting browni CA: SE Francisco Bay south to western habitat (sandy beaches and (nesting colony) Mexico. Colonial breeder on bare or alkali flats) is not present • sparsely vegetated, flat substrates: on the project site. Species California least tern sand beaches, alkali flats, land fills, was not observed during or paved areas. - 2011 spring survey. Aihene cunicularia US: BCC Open, dry, annual or perennial Moderate: Suitable (burrow sites) CA: SSC grasslands, deserts & scrublands habitat is present on the • characterized by low-growing project site. Species was Burrowing owl vegetation throughout much of not observed during the North and South America. 2011 spring survey. Subterranean nester, dependent upon burrowing mammals, most notably, the California ground squirrel. Calyple coslae US: - Primarily deserts, and brushy Spring and Moderate: Potentially CA: SA foothills, and chaparral in the summer, suitable nesting habitat is Costa's (nesting) southwestern United States and . present. Species was not hummingbird northwestern Mexico. observed during 2011 spring survey. Picoides nuuallii US: - Oak, pine-oak, and riparian Year-round. Moderate: A limited CA: SA woodland in California and . amount of suitable nesting Nuttall's (nesting) northwestern Baja California. - habitat (riparian woodpecker ' woodland) is present on the project site. Species was not observed during 2011 spring survey. Empidonax trail/ii US: FE Rare and local breeder in extensive May— Low: Marginally suitable e.xlimus CA: SE riparian areas of dense willows or September. nesting habitat is present (nesting) (rarely) tamarisk, usually with ' on the project site. Species standing water, in the southwestern ' was not observed during Southwestern U.S. and (formerly?) northwestern - - 2011 spring survey. willow flycatcher Mexico. Winters in Central and South America. Lanius lüdovicianus US: - Open country in much of North Year-round Low: Marginally suitable CA: SSC America, but declining in many -. nesting habitat is present Loggerhead shrike (nesting) areas, including southwestern on the project site. Species California. was not observed during 2011 spring survey. Vireo belliipusullus US: FE Primarily riparian forests and willow April— Moderate: A limited (nesting) CA: SE thickets. The most critical structural September amount of suitable nesting component of Least Bell's Vireo habitat is present on the Least Bell's vireo habitat-in California is a dense shrub project site. Species was layer 2 to 10 feet above ground. • not observed during 2011 Nests from central California to spring survey. northern Baja California Sur. Winters primarily in Baja California Sur. P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report'FinalBiological Resources Report.doc (1/1912012) B- i 9 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Eremophila alpesiris US: - Open grasslands and fields, Year-round Moderate: Suitable acüa CA: SA agricultural areas from northern foraging habitat (disturbed coastal California to northwestern areas) is present on the California horned Baja California. project site. Species was lark not observed during 2011 spring survey. Baeolophus , US:— Primarily oak woodland from Year-round Low: Marginally suitable inornalus CA: SA southern Oregon to southern Baja nesting habitat is present (nesting) California Sur. on the project site. Species Oak titmouse was not observed during 2011 spring survey. Campylorhynchus US: - Cactus-dominated coastal sage scrub Year-round Absent: Suitable habitat brunneicapillus CA: SSC from southern Orange County to (cactus) is not present on sandiegensis extreme northwestern Baja the project site. Species California. Requires tall, dense ' was not observed during San Diego cactus stands of Opuntia or Cylindropuntia , 2011 spring survey. wren cacti for nesting and roosting. Cistoihorus palustris US: - Local resident in freshwater marshes Year-round Moderate: Suitable clarkae CA: SSC on the coastal slope from Los nesting habitat (marsh Angeles County to northwestern vegetation) is present on Clark's marsh wren Baja California. the project site. Species was not observed during 2011 spring survey. Polioplila ca1fornica US: FT Inhabits coastal sage scrub in low- Year-round Moderate: A limited ca1fornica CA: SSC lying foothills and valleys in amount of suitable habitat cismontane southwestern California (coastal sage scrub) is Coastal California and northwestern Baja California. present on the project site. gnatcatcher . - Species was not observed during 2011 spring survey. Dendroicapetechia US: - Riparian woodland while nesting in Spring and Moderate: Suitable brewsieri CA: SSC the western U.S. and northwestern summer nesting habitat (riparian (nesting) Baja California; more widespread in woodland) is present on brushy areas and woodlands during the project site. Species Yellow warbler migration, and in winter, when was not observed during occurring from western Mexico to 2011 spring survey. northern South America. Migrants are widespread and common. Icteria virens US: - Riparian thickets of willow, brushy Summer in Moderate: Suitable (nesting) CA: SSC tangles near watercourses. Nests in California nesting habitat (riparian riparian woodland throughout much woodland) is present on Yellow-breasted of western North America. Winters the project site. Species chat in Central America. was not observed during 2011 spring survey. Aimophila ruficeps US: - Steep, rocky coastal sage scrub and Year-round, Moderate: Suitable canescens CA: SA open chaparral habitats, particularly diurnal activity habitat (coastal sage scrubby areas mixed with scrub) is present on the Southern California grasslands. From Santa Barbara project site. Specieswas rufous-crowned County to northwestern Baja not observed during 2011 sparrow California. spring survey. P:\HCR1102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/1912012) - E-20 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Chondesies US: - Open situations with scattered Year-round, Moderate: Potentially grammacus CA: SA bushes or trees. Breeds throughout diurnal suitable habitat is present (nesting) much of western North America and on the project site. Species Lark sparrow winters from the southern United was not observed during States to southern Mexico. - 2011 spring survey. Amphispiza be/li be/li US: - Occupies chaparral and coastal sage Year-round, Low: A limited amount of CA: SA scrub from west central California to diurnal activity potentially suitable habitat Bell's sage sparrow northwestern Baja California. Nests (coastal sage scrub) is in chaparral dominated by fairly present on the project site. - dense stands of chamise. Found in Species was not observed coastal sage scrub in south of range. during 2011 spring survey. Passerculus US: - Inhabits coastal salt marshes, from Year-round, Absent: Suitable habitat sandwichensis CA: SE Santa Barbara south through diurnal (coastal salt marsh) is not beldingi northwestern Baja California. Nests present on the project site. in Salicornia on andabout margins Species was not observed Belding's Savannah of tidal flats. during 2011 spring survey. sparrow - Agelaius tricolor US: - Open country in western Oregon, Year-round, Low: Potential nesting CA: SSC California, and northwestern Baja diurnal habitat (marsh vegetation) Tricolored (nesting California. Nests primarily in is marginal on the project blackbird colony) freshwater marshes, site. Species was not • observed during 2011 spring survey and is not known to breed near Lake Calavem (Unitt, 2004). Xanihocephalus US: - Nests in freshwater marshes in Year-round, Low: Potentially suitable xant hocep ha/us CA: SSC central-western North America and diurnal nesting-habitat (marsh (nesting) disperses to open cultivated land and vegetation) is present on Yellow-headed marshes as far as southern Mexico. the project site, but the - blackbird - , -. 'species is rare and local in San Diego County. Species was not observed during 2011 spring survey. Carduelis lawrencei US: - Oak woodland chaparral, riparian Year-round, . Moderate: Potentially CA: SA woodland and other habitats in and diurnal suitable habitat is present Lawrence's (nesting) regions, but usually near water; from on the project site. Species goldfinch northern California to northern Baja' was not observed during California, but periodically ' 2011, spring survey. wandering throughout much of western North America. Mammals Choeronycieris US: - Uses a variety of habitats from the Year-round Low: Marginally suitable mexicana CA: SSC southwestern United States through roosting habitat (cliffs) is Central America. In California, this present on the project site. Mexican long- ' species has been observed in San Species was not observed tongued bat Diego County, likely as a seasonal - - during 2011 spring survey. migrant. Feeds on nectar and pollen of night-blooming succulents; may visit hummingbird feeders. Roosts in caves, mines, and occasionally buildings. P:\HCR I 102 - Calavera Dam Routine Maintenancc\Bio Report\Final_Biological Resources Report.doc (1/19/2012) E-21 LSA ASSOCIATES, INC. BIOLOCICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA Special Interest Species Summary Table for Potential Occurrence • Activity Species Status Habitat and Distribution Period Occurrence Probability Anirozouspallidus US: - Day roosts in caves, crevices, rocky Year-round; Moderate: Suitable CA: SSC outcrops, tree hollows or crevices, nocturnal habitat (rocky outcrops, Pallid bat mines and occasionally buildings, shrublands, and culverts, and bridges. Night roosts woodlands) is present near may be more open sites, such as the project site; species porches and open buildings. may forage over the site. Grasslands, shrublands, woodlands, Species was not observed and forest in western North during 2011 spring survey. America. Corynorhinus US: - Ranges from southwestern Canada Primarily the Low: Marginally suitable townsendii CA: SSC through the western United States to warmer habitat is present on the southern Mexico. Requires caves, months project site. Species was Townsend's big- mines, tunnels, buildings or other not observed during 2011 eared bat similar structures for roosting. spring survey. Occasionally roosts in hollow spaces of bridges or buildings. Will occasionally roost in hollow trees. Highly sensitive to disturbance. Lasionycieris US: - Primarily associated with north Primarily the Moderate: Suitable noclivagans CA: SA temperate zone conifer and mixed winter months foraging habitat is present conifer/hardwood forests across on the project site. Species Silver-haired bat southern Canada and most of the was not observed during United States. May be found in 2011 spring survey. winter and during seasonal migration in lower, xeric habitats. Roosts mainly in hollows or crevices of trees, but may also roost in rock crevices, mines, or caves. May • fojage considerable distance from roosting area. Lasiurus blossevillii US: - Ranges from southwestern Canada Primarily the Moderate: Suitable CA: SSC through.the western United States warmer 'habitat (trees and water) is Western red bat and Middle America to South months present on the project site. • America. Forages over a wide range Species was not observed of habitats, but often associated with during 2011 spring survey. intact riparian habitat, and • particularly with willows, cottonwoods, and sycamores. Typically solitary, roosting in the foliage of trees or shrubs. Day roosts are commonly in edge habitats • , adjacent to streams or open fields, in orchards, and sometimes in urban, areas. Lasiurus cinereus US: - Widespread in North America (and Primarily the Moderate: Suitable CA: SA Hawaii). Forages over a wide range warmer habitat (trees and water) is Hoary bat of habitats, but prefers open habitats months; leaves present on the project site. with access to water and trees for colder areas Species was not observed roosting. Typically solitary, roosting during winter during 2011 spring survey. in the foliage of shrubs or coniferous and deciduous trees. Roosts are usually near the edge of a clearing. P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (111912012) E-22 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 - CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA Special Interest Species Summary Table for Potential Occurrence - -: Activity Species Status Habitat and Distribution Period Occurrence Probability Lasiurus xanihinus US: - Varied habitats from the southwestern Year-round; Low: Marginally suitable CA: SSC United States to southern Mexico; nocturnal roosting habitat (riparian Western yellow bat often associated with palms and desert areas) is present on the riparian habitats. In southern project site. Species was California occurs in palm oases and in not observed during 2011 residential areas with untrimmed palm spring survey. trees. Roosts primarily in trees, especially the dead fronds of palm trees, though they have also been documented to roost under the leaves of deciduous trees such as cottonwoods. Myotis ciliolabrum US: - Found across much of North Primarily the Low: Marginally suitable CA:SA America, primarily in relatively and warmer habitat is present on the Western small- wooded and brushy uplands near months project site. Species was footed myotis water. Individuals are known to roost not observed during 2011 singly or in small groups in cliff and . spring survey. rock crevices, buildings, concrete overpasses, caves, and mines. Myolis evolis US: - Found throughout much of North Primarily the Low: Marginally suitable CA: SA America, in semiarid shrublands, warmer habitat is present on the Long-eared myotis chaparral, and agricultural areas, but months project site. Species was is usually associated with coniferous not observed during 2011 • forests. Roosts under exfoliating tree spring survey. bark and in hollow trees, caves, • mines, and crevices in cliffs/rocks. Sometimes roosts in buildings and bridges. Myolls thysanodes US: - Range is patchy in western North Primarily the Low: Marginally suitable CA: SA America from sea level to warmer habitat is present on the Fringed myotis 9,350 feet; most common at middle months project site. Species was elevations. Appears to be most not observed during 2011 • common in drier woodlands but is spring survey. found in a wide variety of habitats including desert scrub, mesic coniferous -forest, grassland, and - sage-grass steppe. Roosts primarily in large trees and snags, as well as in caves and mines. Also roosts in - buildings, rock crevices, cliff faces, • and bridges. Myotis volans - US: - Widespread in western North Primarily the Low: Marginally suitable CA:- SA America, primarily in coniferous warmer habitat is present-on the Long-legged- myotis forests, but also occurs seasonally in months project site. Species was • riparian and desert habitats. Utilizes - not observed during 2011 - abandoned buildings, cracks in the spring survey. - ground, cliff crevices, exfoliating - tree bark, and hollows within snags as summer day roosts; caves and - - - mine tunnels are used as - hibernacula. Commonly forages in - - and around the forest canopy. P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19/2012) E.-23 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Myo:isyumanensis US: - Optimal habitats are open forests Primarily the Moderate: Suitable CA: SA and woodlands with sources of warmer habitat (woodlands and Yuma myotis water over which to feed. Common months water) is present on the and widespread in California. project site. Species was Uncommon in the Mojave and not observed during 2011 Colorado Desert regions, except for spring survey. mountains. Ranging generally from sea level to 8,000 feet. Roosts in buildings, mines, caves or crevices; occasionally in swallow nests and under bridges. Eumopsperolis US: - Occurs in many open, semi-arid to Primarily the Moderate: Suitable calfornicus CA: SSC and habitats, including conifer and warmer habitat (coastal scrub and deciduous woodlands, coastal scrub, months cliffs) is present near the Western mastiff bat grasslands, chaparral, etc.; roosts in project site; species may crevices in vertical cliff faces, high forage over the site. buildings, and tunnels; and travels Species was not observed widely when foraging. Ranged during 2011 spring survey. historically throughout much of the southwestern United States and northwestern Mexico. In California, most records are from rocky areas at low elevations where roosting occurs primarily in crevices. Nyctinomops US: - Varied habitats, but usually associated Primarily the Low: Although roosting is femorosaccus CA: SSC with high cliffs or rocky areas. Spotty warmer unlikely, foraging habitat distribution, ranging from southern months is present and this species Pocketed free-tailed California and southwestern Arizona is known to forage far bat through central Mexico. Roosts from roost sites. Species primarily in cliffs/rock crevices; may was not observed during use buildings for roosting. Rarely 2011 spring survey. roosts in bridges. Nyctinomops US: - Mainly inhabits rugged, rocky Primarily the Lów:'Although roosting is macrosis CA: SSC habitats in and southwestern North warmer unlikely, foraging habitat America. Feeds principally on large months is present and this species Big free-tailed bat moths. Roosts primarily in cliffs/rock is known to forage far crevices, and rarely in buildings, from roost sites. Species caves, and tree cavities. Not known to was not observed during use bridges for roosting. 2011 spring survey. Lepus ca1fornicus US: - Open country of coastal southern Year-round, Low: A limited amount of bennetiii CA: SSC California and northwestern Baja diurnal and marginally suitable habitat California, but extirpated from many crepuscular is present on the project San Diego black- areas. activity site. Species was not tailed jackrabbit observed during 2011 spring survey. Chaetodipus US: - Found in a variety of habitats Year-round; Moderate: Suitable ca1fornicusfemora1is CA: SSC including coastal sage scrub, chaparral, nocturnal habitat (coastal sage and grassland in northern Baja scrub) is present on the Duizura pocket California, San Diego and extreme project site. Species was mouse southwestern Riverside Counties, not observed during 2011 Limit of range to northwest (at spring survey. interface with Cc. dirpar) unclear. P:\HCRI 102- Calavera Dam Routine Maintenance'Bio Report\Final_Biological Resources Report.doc (1/19/2012) E-24 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD. CALIFORNIA Special Interest Species Summary Table for Potential Occurrence Activity Species Status Habitat and Distribution Period Occurrence Probability Chaetodipus fallax US: -. Found in sandy herbaceous areas, Year-round; Moderate: Suitable fallax CA: SSC usually associated with rocks or nocturnal habitat (coastal scrub) is coarse gravel in coastal scrub, present on the project site. Northwestern San chaparral, grasslands, and sagebrush, Species was not observed Diego pocket mouse from Los Angeles County through during 2011 spring survey. southwestern San Bernardino, • western Riverside, and San Diego • Counties to northern Baja California. Dipodomys step hensi US: FE Found in plant communities Year-round; Low: A limited amount of CA: ST transitional between grassland and nocturnal marginally suitable habitat Stephens' kangaroo coastal sagescrub, with perennial (coastal sage scrub) is rat vegetation cover of less than 50%. . present on the project site. Most commonly associated with Species was not observed Artemesia trident ala, Eriogonum during 2011 spring survey. fasciculatum, and Erodium. Requires well-drained soils with compaction characteristics suitable for burrow construction. Not found in soils that are highly rocky, less than 20 inches deep, or heavily alkaline or clay, or in areas exceeding 25% slope. Occurs only in western Riverside County, northern San Diego County, and extreme southern San Bernardino County, below 3,000 feet elevation. Perognat hus , US: FE Historically occupied open habitats. . April— Absent: Only four known longimembris CA: SSC on sandy soils along the coast from September; populations, the nearest pac/lcus Los Angeles to the Mexican border, nocturnal one is approximately 7 Now known from only four sites in miles from the project site. Pacific pocket Orange and San Diego Counties. Species was not observed mouse . . . during 2011 spring survey. Neotoma lepida US: - Frequents poorly vegetated and Year-round, High: Suitable habitat is intermedia . CA: SSC lands and is often associated with mainly present on the project site. cactus patches. Occurs along the nocturnal, Species was not observed San Diego desert Pacific slope from San Luis Obispo occasionally during 2011 spring survey. woodrat . County to northwest Baja California. crepuscular and diurnal Taxidea laxus US: - Primary habitat requirements seem Year-round Absent: Suitable habitat CA: SSC to besufficient food and friable soils . (open uncultivated American badger in relatively open uncultivated ground) is not present on ground in grasslands, woodlands, the project site. Species or and desert. Widely distributed in suitable burrows were not North America. . observed during 2011 • _____________ spring survey. Bassariscus aslulus US: - Woody and rocky areas of the Year-round Moderate: Potentially CA: CFP southwestern United States and most suitable habitat is present Ringtail . of Mexico. on the project site. Species was not observed during 2011 spring survey. P:\HCRI 102- Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (I/I9t20I2) E25 LSA ASSOCIATES, INC. BIOLOGICAL RESOURCES REPORT JANUARY 2012 CALAVERA DAM ROUTINE MAINTENANCE PROJECT CITY OF CARLSBAD, CALIFORNIA LEGEND US: Federal Classifications FE Taxa listed as Endangered. FT Taxa listed as Threatened. FC Candidate for listing as Threatened or Endangered. BCC Bird of Conservation Concern CA: State Classifications SE Taxa State-listed as Endangered. . . ST Taxa State-listed as Threatened. SSC California Species of Special Concern. Refers to animals with vulnerable or seriously declining populations. CFP California Fully Protected. Refers to animals protected from take under Fish and Game Code Sections 3511, 4700, 5050, and 5515. SA Special Animal. Refers to any other animal monitored by the Natural Diversity Data Base, regardless of its legal or protection status. SP Special-Plant. Refers to any other plant monitored by the Natural Diversity Data Base, regardless of its legal or protection status. lB California Rare Plant Rank IB: Rare, threatened, or endangered in California and elsewhere. 2 California Rare Plant Rank 2: Rare, threatened, or endangered in California, but more common elsewhere. 3 California Rare Plant Rank 3; A review list of plants about which more information is needed. 4 California Rare Plant Rank 4:A watch list of plants of limited distribution. California Rare Plant Ranks are assigned by a committee of government agency and non-governmental botanical experts and are not official State designations of rarity status. Occurrence Probability Designations: Absent This ranking refers to plant species that are perennial, obvious, and were not observed on the project site; and animal species that would not occur within the habitat on site. Low Existingpopulationsare not known to occur near the site, and any potential habitat is of marginal quality; or the species is known to occur near the site but suitable habitat is not present on site. This category also applies to bird species that migrate through the project site, but would not be present during the nesting season (or for which no suitable nesting habitat is present), and for species with moderate potential to occur but were not detected during focused surveys. - Moderate The species is not known to occur near the site, but suitable habitat is present within or near the project site. High The species is known to occur near the site, and suitable habitat occurs within the project site. P:\HCRI 102 - Calavera Dam Routine Maintenance\Bio Report\Final_Biological Resources Report.doc (1/19t2012) 1 1 E-26