Biological Resource Evaluation for the 564 Magnolia Street Project, Half Moon Bay, San Mateo County, California

AUGUST 2019

PREPARED FOR City of Half Moon Bay

PREPARED BY SWCA Environmental Consultants

BIOLOGICAL RESOURCE EVALUATION FOR THE 564 MAGNOLIA STREET PROJECT, HALF MOON BAY, SAN MATEO COUNTY, CALIFORNIA

Prepared for City of Half Moon Bay 501 Main Street Half Moon Bay, California 94019 Attn: Brittney Cozzolino, Associate Planner

Prepared by Lincoln Allen, Senior Project Manager/Biologist SWCA Environmental Consultants 1422 Monterey Street, Suite C200 San Luis Obispo, CA 93401 (805) 543-7095 www.swca.com

SWCA Project No. 55849

June 2019

564 Magnolia Street Project Biological Resource Evaluation

EXECUTIVE SUMMARY

SWCA Environmental Consultants (SWCA) prepared this Biological Resource Evaluation (BRE) in support of a Coastal Development Permit (CDP) for the proposed addition of a single-family residence located at 564 Magnolia Street in the city of Half Moon Bay, San Mateo County, California (project).

This BRE documents the existing environmental setting for the project and the biological study area (which includes the property boundary plus a 200-foot buffer). SWCA conducted a desktop review and field survey for sensitive biological resources with the potential to occur in the biological study area (BSA), and to identify activities that may impact a Coastal Resource Area (CRA). In addition, this BRE provides a list of recommended avoidance and minimization measures designed to prevent the project from having a potentially significant biological impact.

Based on the results of the literature review and field survey, the BSA contains: • suitable habitat for several nesting migratory birds covered under the Migratory Bird Treaty Act; • suitable dispersal and estivation habitat for two federally or state listed wildlife species (California red-legged frog [Rana draytonii] and San Francisco garter snake [Thamnophis sirtalis tetrataenia]); • suitable over-wintering habitat for one federal candidate species Monarch butterfly (Danaus plexippus); • suitable habitat for a California Native Plant Society rank 1B.2 plant (fragrant fritillary [Fritillaria liliacea]); • an intermittent drainage channel that may be subject to U.S. Army Corps of Engineers and/or California Department of Fish and Wildlife jurisdiction; • a drainage swale that may be subject to California Coastal Commission jurisdiction; and • CRAs, including sensitive habitat areas.

No special-status plant or animal species were observed during the survey, although suitable habitat for the above-mentioned species was observed in the BSA. The project is located approximately 20 feet south of a potentially jurisdictional water feature. The proposed project does not encroach beyond the property boundary, and the existing drainage ditch (potential jurisdictional water feature) would be culverted as part of the driveway installation. The project may impact a CRA as defined by the City of Half Moon Bay Land Use Plan and Zoning Ordinance. However, no significant biological impact is expected provided that avoidance and minimization measures in Section 5 are implemented.

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CONTENTS

Executive Summary ...... i 1 Introduction ...... 1 1.1 Purpose of Biological Resource Evaluation ...... 1 1.2 Project Location and Description ...... 1 2 Regulatory Background ...... 1 2.1 Federal Endangered Species Act ...... 1 2.2 California Endangered Species Act ...... 1 2.3 California Coastal Act and Half Moon Bay Local Coastal Program ...... 3 3 Methodology ...... 3 3.1 Desktop Review and Literature Research ...... 3 3.2 Field Survey ...... 5 4 Results...... 5 4.1 Vegetation and Habitat Types ...... 5 4.2 Sensitive Resource Assessment ...... 7 4.2.1 Special-Status Species ...... 7 4.2.2 Nesting Migratory Passerine Birds and Raptors ...... 9 4.2.3 Wildlife Habitats ...... 9 4.2.4 Wetlands, Floodplains, and Waters of the U.S...... 10 4.2.5 Coastal Resource Areas ...... 10 5 Avoidance and Minimization Measures ...... 11 6 References ...... 14

Appendices

Appendix A. Photo Documentation Appendix B. USFWS Records Results Appendix C. CNDDB and CNPS Record List and Consideration for Potential Occurrence in the Biological Study Area Appendix D. Species Observed During the Field Survey Appendix E. Special-Status Species Records

Figures

Figure 1. Project vicinity map...... 2 Figure 2. Project location map...... 4 Figure 3. Vegetation community map...... 6

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1 INTRODUCTION

1.1 Purpose of Biological Resource Evaluation

This Biological Resource Evaluation (BRE) has been prepared by SWCA Environmental Consultants (SWCA) at the request of the City of Half Moon Bay (City). The intent of this report is to identify sensitive biological resources and activities that may impact a Coastal Resource Area (CRA) per the City’s Zoning Code (City Code) and Land Use Plan (LUP) for the proposed existing single-family residence located at 564 Magnolia Street in Half Moon Bay, San Mateo County, California (project). This report includes the results from a desktop review, literature search, and a field survey of the project site including areas within a 200-foot buffer, referred to hereafter as the biological study area (BSA).

1.2 Project Location and Description

The project includes construction of a new single-story single-family residence at 564 Magnolia Street. Construction of the residence driveway and culvert are the only proposed frontage improvements; the project will not include construction of curb, gutter, or sidewalk. The project would require the removal of eucalyptus trees within the project area. The project is located on a marine terrace approximately 155 to 165 feet above mean sea level, approximately 0.6 mile east of the Pacific Ocean. The project is surrounded by a densely developed residential community to the north, agricultural land to the south, Highway 1 to the east, and the Pacific Ocean to the west (Figure 1). Per the project site plan, the proposed project includes a 31-foot × 124-foot lot for a single-family home, which would include a paved driveway. Photographs of the project site are included in Appendix A.

2 REGULATORY BACKGROUND

2.1 Federal Endangered Species Act

The Federal Endangered Species Act of 1973 (FESA) is administered by the U.S. Fish and Wildlife Service (USFWS) and prevents the unlawful “take” of listed fish, wildlife, and plant species. Section 9(a)(1)(B) specifically states “take” of species listed as threatened or endangered is unlawful. “Take” is defined as any action that would harass, harm, pursue, hunt, wound, shoot, kill, trap, capture, or collect any threatened or endangered species. Section 10 of the FESA allows USFWS to issue incidental take permits if take of a listed species may occur in the course of otherwise lawful activities. Section 10(a)(1)(B) requires a Habitat Conservation Plan for an incidental take permit on non-federal lands.

2.2 California Endangered Species Act

The California Endangered Species Act of 1984 (CESA) and the Native Plant Protection Act of 1977 (NPPA) ensure legal protection for plants listed as rare or endangered, and wildlife listed as threatened or endangered. The California Department of Fish and Wildlife (CDFW) regulates activities that may result in the “take” of such species. Take of state-listed species would require a Section 2081 incidental take permit from CDFW. This process requires submittal of a sensitive species study and permit application package to CDFW. If CDFW concurs that impacts to a state-listed species would likely occur as a result of a proposed project, alternatives and measures to avoid or reduce the impacts must be identified in a Section 2081 permit to allow for incidental take authorization. CDFW may also include compensatory mitigation (mitigation/conservation bank) requirements for impacts to habitat for listed plants and wildlife.

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Figure 1. Project vicinity map.

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2.3 California Coastal Act and Half Moon Bay Local Coastal Program

The California Coastal Act of 1976 (CCA) governs the decisions made by the California Coastal Commission (CCC) regarding issues such as shoreline public access and recreation, terrestrial and marine habitat protection, water quality, commercial fisheries, and development within the California coastal zone. Development within the coastal zone would require either a Coastal Development Permit (CDP) or CDP Exemption from the CCC or from a local government with a CCC-certified Local Coastal Program.

The City’s Local Coastal Program has been developed in compliance with the CCA and is guided by the City’s Local Coastal Program Land Use Plan (City of Half Moon Bay 1993). In accordance with the City Zoning Code Section 18.380 and 18.38.035, Coastal Resource Conservation Standards (City of Half Moon Bay 2018), SWCA conducted the biological resource survey and prepared this BRE to assess whether the project would impact a CRA. As defined by Section 18.38.020 of the City Code, CRAs may include the following resources: (1) sensitive habitats including sand dunes, marine habitats, sea cliffs, riparian areas, wetlands, coastal tidelands and marshes, lakes and ponds, adjacent shore habitats, coastal and offshore areas containing breeding and/or nesting sites or used by migratory and resident water- associated birds for resting and feeding, areas used for scientific study and research concerning fish and wildlife, existing game or wildlife refuges and reserves, habitats containing or supporting unique species or any rare and endangered species defined by the State Fish and Game Commission, rocky intertidal zones, and coastal scrub community associated with coastal bluffs and gullies; (2) riparian area and corridors; (3) bluff, cliffs, and sea-cliffs; (4) wild strawberry habitat; (5) wetlands; and (6) archaeological resources.

3 METHODOLOGY

3.1 Desktop Review and Literature Research

SWCA performed an extensive literature review to gain familiarity with the project and to identify potential sensitive biological features, including CRAs, target flora and fauna species, and wetlands that have the potential to occur in the BSA (Figure 2). The review consisted of a records search of current versions of the CDFW California Natural Diversity Database (CNDDB) (CNDDB 2019), the USFWS online Information for Planning and Consultation (IPaC) species list system (USFWS 2019b) (Appendix B), and the California Native Plant Society (CNPS) online Inventory of Rare and Endangered Plants (CNPS 2019) within the U.S. Geological Survey (USGS) Half Moon Bay and Montara 7.5-minute topographic quadrangles. The CNDDB search was further refined to a 5-mile search surrounding the project. The USFWS Critical Habitat Mapper (USFWS 2019a) was queried to identify critical habitat for terrestrial and aquatic species near the BSA. SWCA biologists also reviewed Calflora maps of listed species (Calflora 2019) and compared them against the results of the CNDDB and CNPS searches. All of the listed species and habitats found in the literature review were compiled into a table for use during the field survey (Appendix C), as described in Section 3.2 below.

The U.S. Department of Agriculture Natural Resources Conservation Service (NRCS) Soil Survey for San Mateo County (NRCS 2019), National Wetlands Inventory (NWI) Database (USFWS 2019c), USGS National Hydrography Dataset (NHD) (USGS 2019), USGS topographic quadrangles, and aerial imagery were also reviewed to provide additional information for soils and potential wetlands known to occur in the BSA. Literature pertaining to potential sensitive natural resources and pertinent zoning and land use documents were studied to determine the classification of CRAs as well as the compliance requirements for the project (City of Half Moon Bay 1993, 2018).

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Figure 2. Project location map.

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3.2 Field Survey

A field survey was conducted on June 10, 2019, by SWCA biologist Jessie Henderson-McBean. The survey included walking transects that covered the property boundary as well as the surrounding 200-foot buffer (see Figure 2). The surveyor assessed the BSA for its potential to support special-status plant and wildlife species, potential wetland features, habitat types, wildlife movement corridors, and indications of wildlife breeding activities. No formal wetland delineation was conducted during the field survey. The Jepson Manual (Baldwin et al. 2012) was referenced to identify plant species. Project footprints and construction methods were considered to determine whether they could impact a CRA. A list of species observed during the survey is included in Appendix D.

4 RESULTS

4.1 Vegetation and Habitat Types

The BSA consists of asphalted roadways, a residential community, and an undeveloped eucalyptus forest. In total, two vegetation communities were mapped in the BSA (Figure 3) and were defined according to Preliminary Descriptions of the Terrestrial Natural Communities of California (Holland 1986).

The dominant species occurring in the BSA is blue-gum eucalyptus (Eucalyptus globulus), with an understory of non-native annual grasses and herbs including slender wild oat (Avena barbata), ripgut brome (Bromus diandrus), and cut-leafed geranium (Geranium dissectum).

Less than approximately 1 hectare of eucalyptus forest is located within the project area, and approximately less than 0.1 acre would be impacted by the project.

4.1.1.1 EUCALYPTUS FOREST

Eucalyptus forests consist of dense stands of non-native, invasive eucalyptus trees, and are usually devoid of an understory with the exception of a few hardy grasses. Stands generally range from 30 to 55 meters (98 to 180 feet) high and are frequently found in cooler coastal areas and along stream courses.

During the biological survey, one active red-tailed hawk (Buteo jamaicensis) nest was observed within the eucalyptus stand, and the eucalyptus forest in the BSA has potential to support other nesting birds protected under the Migratory Bird Treaty Act (MBTA). This vegetation community may also provide roosting opportunities for over-wintering monarch butterflies (Danaus plexippus). The understory of bark and leaf litter may provide suitable dispersal or estivation habitat for California red-legged frog (Rana draytonii).

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Figure 3. Vegetation community map.

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1.1.1.3 NON-NATIVE GRASSLAND

Non-native grassland may include a composition of both exotic and native grasses in association with native annual forbs (wildflowers). Germination occurs with the onset of late fall rains, with growth, flowering, and seed-set occurring from winter through spring. With a few exceptions, the plants are dead through the summer-fall dry season, persisting only as seeds (Holland 1986). Common elements include slender wild oat, ripgut brome, Italian rye grass (Festuca perennis), cut-leafed geranium (Geranium dissectum), bristly ox-tongue (Helminthotheca echioides), and California blackberry (Rubus ursinus).

Non-native grassland mixed with interspersed ornamental vegetation occurs within the vegetated buffer between the northeast and southeast side of the project area. In addition, there is a potentially jurisdictional drainage feature to the east of the project area within the non-native grassland habitat. This habitat may provide suitable dispersal habitat for the California red-legged frog during migration.

4.2 Sensitive Resource Assessment

4.2.1 Special-Status Species

4.2.1.1 SPECIAL-STATUS PLANTS

No federally, state-, or CNPS-listed species were observed in the BSA during the field survey. A desktop review (CNPS and CNDDB) produced a total of 47 special-status plant species, including federally and state-listed species and CNPS 1 and 2 ranked species (Appendix E). A description of the special-status species and their potential to occur is included in Appendix C. Of the 47 special-status species that were reviewed, one CNPS-listed plant species, fragrant fritillary (Fritillaria liliacea; CNPS 1B.2), was determined to have potential to occur in the BSA. There is low potential for fragrant fritillary to occur within the non-native grassland area in the BSA. The field survey was conducted outside of the appropriate blooming period for this species. With the implementation of avoidance and minimization measures provided in Section 5, including a preconstruction survey for fragrant fritillary during the appropriate blooming period, no adverse effects to special-status plants are expected to occur as a result of the project.

No natural communities of concern were identified in the BSA. The field survey revealed a landscape dominated by urban development, a eucalyptus forest, and non-native grassland.

4.2.1.2 SPECIAL-STATUS WILDLIFE

No federal, state, or sensitive animal species were observed in the BSA during the field survey. No USFWS-designated critical habitat is located within the BSA. A total of 12 special-status wildlife species were reviewed for their potential to occur in the BSA. A description of these species and their potential to occur is included in Appendix C. Of the 12 special-status species that were reviewed, three special-status wildlife species were determined to have potential to occur in the BSA: • California red-legged frog: federally threatened, CDFW Species of Special Concern (SSC); • San Francisco garter snake (Thamnophis sirtalis tetrataenia): federally and state endangered, CDFW fully protected species; and • Monarch butterfly: federal candidate species

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4.2.1.2.1 California Red-Legged Frog (Rana draytonii)

California red-legged frog, a federally threatened and CDFW SSC, occurs in various habitats during its life cycle. Breeding areas include aquatic habitats, such as lagoons, streams, and natural and human-made ponds. The species prefers aquatic habitats with little or no flow, the presence of surface water to at least early June, surface water depths to at least 2.3 feet, and the presence of emergent vegetation (e.g., cattails and bulrush). During periods of wet weather, some individuals may make overland dispersals through adjacent upland habitats of distances up to 1 mile (USFWS 2002). Upland habitats including small mammal burrows and woody debris can also be used as refuge during the summer if water is scarce or unavailable (Jennings and Hayes 1994). California red-legged frogs typically travel between sites and are unaffected by topography and vegetation types during migration. Dispersal habitat makes it possible for California red-legged frogs to locate new breeding and non-breeding sites and is crucial for conservation of the species.

Ten California red-legged frog occurrences have been recorded within 5 miles of the BSA between 1999 and 2016 (CNDDB 2019). The nearest CNDDB record indicates an adult California red-legged frog was observed approximately 300 meters southwest of the BSA (see Appendix E). The drainage and swale features, and adjacent eucalyptus forest and grassland areas, may provide suitable foraging or dispersal habitat for this species. Based on the abundance of known occurrences within 5 miles of the property boundary and the presence of suitable aquatic breeding and non-breeding habitat within the vicinity of the BSA, there is potential for California red-legged frog to occur in the BSA. However, the developed and disturbed nature within the project area diminishes the quality habitat for this species; therefore, it was determined that there is low potential for California red-legged frog to occur within the project area. With the implementation of avoidance and minimization measures provided in Section 5, no substantial adverse effects to California red-legged frog are anticipated to occur as a result of the project.

4.2.1.2.2 San Francisco Gartner Snake (Thamnophis sirtalis tetrataenia)

The federally and state endangered San Francisco garter snake’s historical range is entirely within San Mateo County. The two main components of San Francisco garter snake habitat are: (1) wetlands supporting its prey species (e.g., California red-legged frog and Pacific chorus frog [Pseudacris regilla]); and (2) surrounding uplands that support small mammal burrows used by the snakes for escape cover (USFWS 2006). San Francisco garter snakes inhabit various aquatic habitats, including reservoirs, freshwater marshes, creeks, drainage ditches, ponds, and lakes. Less ideal habitats can also be used by San Francisco garter snake, such as ditches and other waterways, or floating algal or rush mats. Suitable breeding habitat includes shallow marshlands with an abundance of emergent vegetation. Grasslands are also an important upland habitat for this species, as they provide areas for thermoregulation and cover. Prey items for this species include California red-legged frog, Pacific chorus frog, and earthworms. Small mammal burrows are used by San Francisco garter snake during hibernation. During the warm days of summer, most activity occurs during the morning and afternoon. Preferred nocturnal retreats are thought to be holes, especially mammal burrows, crevices, and surface objects (USFWS 2007).

While freshwater emergent wetlands and ponds associated with San Francisco garter snake habitat are absent in the BSA, the drainage and swale features within the BSA may provide marginal foraging or dispersal habitat for this species. Burrows were not observed within the eucalyptus forest due to the thick layer of duff. No burrows were observed in the non-native grassland and landscaped areas in the BSA.

San Francisco garter snake occurrences have been recorded within 5 miles of the BSA. The nearest CNDDB records indicate two San Francisco garter snake adults were captured during a trap study (1988) at a terminal lagoon at the mouth of Pilarcitos Creek, approximately 1.4 miles to the north. The existing drainages may provide marginally suitable foraging habitat for the San Francisco garter snake. However, due to the lack of aquatic habitat that supports breeding populations of their primary prey and lack of

8 564 Magnolia Street Project Biological Resource Evaluation burrows within the project area, it was determined that there is low potential for the San Francisco garter snake to occur within the project area. With the implementation of avoidance and minimization measures provided in Section 5, impacts to San Francisco garter snake are not anticipated to occur as a result of the project.

4.2.1.2.3 Monarch Butterfly (Danaus plexippus)

The monarch butterfly (Danaus plexippus) is a federal candidate for listing. Coastal California offers hundreds of overwintering sites, from Mendocino County to Baja California, Mexico. The majority of overwintering sites are found at low elevation levels (approximately 60-90m) and south, southwest, or west facing slopes, or in shallow canyons or gullies (Pelton et al. 2016). Monarchs require very specific microclimatic conditions, including projection from wind and cold temperatures, which are often found within sites that consist of a roost of blue gum eucalyptus (Eucalyptus globulus), Monterey pine (Pinus radiata), or Monterey cypress (Cupressus macrocarpa) trees. In addition, habitats must have a source of milkweed and nectar plants as a food source. Monarchs are known to return these overwintering sites annually and begin arriving from September through the first half of October to form fall aggregations. By mid-November stable aggregations are formed that persist through January-February. Monarch butterflies breed at the overwintering site in February-March (Pelton et al 2016).

Monarch butterfly occurrences have been recorded within 0.2 mile of the BSA. Historical CNDDB records (last record in 1998) indicate monarchs were observed within 0.5 mile of the BSA. There is potentially suitable habitat within the eucalyptus forest within and surrounding the project area. However, there is low potential for monarchs to over winter in the eucalyptus forest within the proposed project area due to the lack of a roost of trees that provide protection from the wind and other elements. With the implementation of avoidance and minimization measures provided in Section 5, impacts to the monarch butterfly are not anticipated to occur as a result of the project. 4.2.2 Nesting Migratory Passerine Birds and Raptors

The BSA contains suitable nesting and foraging habitat for avian species protected under the MBTA and California Fish and Game Code Sections 3511 and 3513. Avian species protected by the MBTA and California Fish and Game Code observed in the BSA during the field survey include but are not limited to red-tailed hawk (nesting), red-shouldered hawk (Buteo lineatus), Anna’s humming bird (Calypte anna), house finch (Carpodacus cassinii), marsh wren, (Cistothorus palustris), and American crow (Corvus brachyrhynchos).

The project has the potential to impact potential eggs or young of avian species covered under the MBTA and California Fish and Game Code. To avoid and minimize potential impacts, it is recommended that avoidance and minimization measures, including preconstruction nesting bird surveys, described in Section 5 be implemented.

4.2.3 Wildlife Habitats

Due to the fragmentation, development, and high level of disturbance and human activity, it is not anticipated that the project will adversely affect a wildlife movement corridor. While the potentially jurisdictional drainage feature may provide low-quality migration habitat for amphibians, reptiles, and mammals, the project will not have any significant impacts to natural habitat and is not expected to interfere substantially with the movement of any native resident or migratory fish or wildlife, nor impede the use of native wildlife nursery sites.

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4.2.4 Wetlands, Floodplains, and Waters of the U.S.

Two drainage ditch features and one drainage swale were observed within the BSA (see Figure 3). A non- jurisdictional drainage ditch conveys water from the east side of Highway 1 into a drainage swale on the west side of Highway 1 and across the BSA.

Two non-native wetland indicator species, Italian rye grass and California burclover (Medicago polymorpha) were observed within the drainage swale. The City’s Local Coastal Program and CCC generally utilize the USFWS wetland definition, which defines wetlands using a “one parameter definition.” The “one parameter definition” requires identification of only a single parameter (hydric soils, dominance of hydrophytic vegetation, and/or wetland hydrology) to establish wetland conditions. Therefore, areas within the swale feature where hydrophytic vegetation occurs may be considered jurisdictional by the CCC.

A potentially jurisdictional drainage feature runs east to west through the BSA has a clearly visible ordinary high water mark (OHWM), which generally defines the extent of USACE jurisdiction; however, although the drainage ditch has an OHWM, it is a manmade feature excavated in uplands that would not otherwise exist naturally and does not appear to have a significant nexus to navigable waters. Therefore, it is unlikely that this drainage ditch would be a USACE jurisdictional water feature that would be regulated under Clean Water Act Section 404. The defined bed and bank of the drainage ditch generally defines the extent of CDFW jurisdiction (USACE 2008) and may be regulated under Section 1602 of the California Fish and Game Code. Additionally, a surface water feature, such as this drainage ditch, would likely be considered a water of the State and may require a Waste Discharge Requirement Permit from the Regional Water Quality Control Board. The drainage channel OHWM is approximately1- to 2-feet wide by 0.5-feet deep with incised banks. The drainage likely has eventual downstream connectivity to the Pacific Ocean; however, the full length of the drainage was not walked to confirm connectivity. The species observed within the potentially jurisdictional drainage ditch were similar to that of the non-native grassland habitat and included slender wild oat, ripgut brome, Italian rye grass, and red valerian (Centranthus ruber).

4.2.4.1 TOPOGRAPHY AND SOILS

The topography within the BSA is nearly flat (<5% grade). The elevation ranges from approximately 155 to 165 feet above mean sea level. Results from the NRCS Web Soil Survey yielded two soil types within the BSA: Botella clay loam (0 to 2 percent slopes, Major Land Resource Area [MLRA] 14), and Watsonville clay loam, nearly level. No soil pits were dug or examined during the field investigation.

4.2.5 Coastal Resource Areas

Based on the literature review and field survey observations, CRAs were observed throughout the BSA. Observed CRAs include habitats containing or supporting unique species or any rare and endangered species. Provided below is a description of the CRAs and the potential for impacts.

4.2.5.1 RIPARIAN AREAS AND CORRIDORS

Section 18.38.020 of the City Code defines riparian areas and corridors as follows:

Any area of land bordering a perennial or intermittent stream or their tributaries, or around a lake or other body of fresh water, including its banks and at least up to the highest point of an obvious channel or enclosure of a body of water. Riparian corridors are the areas between the limits of riparian vegetation, where limits are determined by vegetative coverage, at least fifty percent of which is comprised of a combination of the

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following plant species: red alder, jaumea, pickleweed, big leaf maple, narrow-leaf cattail, arroyo willow, broadleaf cattail, horsetail, creek dogwood, black cottonwood, and box elder.

Although drainages and swales were observed within the BSA, the drainage ditches and swales do not meet the definition of a riparian area or corridor under Section 18.38.020 of the City Code. Therefore, the drainage ditches do not meet the criteria for a riparian area or riparian corridor CRA.

4.2.5.2 HABITATS CONTAINING OR SUPPORTING UNIQUE SPECIES OR ANY RARE AND ENDANGERED SPECIES

Various habitats in the BSA have the potential to support unique species and/or special-status species. The distribution of special-status species with potential to occur in the BSA is discussed in Section 4.4.1. Unique species, including raptors, California red-legged frog, sea mammals, California wild strawberry (Fragaria californica), and Monterey pine (Pinus radiata) have been identified by the City as having “scientific or historic value, few indigenous habitats, or some characteristics that draw attention or are locally uncommon” (City of Half Moon Bay 1993).

The eucalyptus forest and non-native grassland habitat observed in the BSA (see Figure 3) have the potential to support unique and/or special-status species such as California red-legged frog, San Francisco garter snake, and monarch butterfly, as well as suitable nesting and foraging habitat for migratory birds and raptors. Impacts to these habitats would occur through the removal of eucalyptus trees and non-native grasses to accommodate the proposed project. However, the project is not expected to have significant impacts to unique, rare, or endangered species or their habitats as the habitats within the project area only provide marginally suitable habitat for these species and the species were not observed during the biological survey. The avoidance and minimization measures described in Section 5 are recommended to avoid potential impacts to unique, rare, or endangered species and their habitats.

5 AVOIDANCE AND MINIMIZATION MEASURES

The goal of this BRE is to identify sensitive biological resources in the BSA and to provide avoidance and minimization measures that will prevent the project activities from resulting in substantial adverse effects on special-status species, riparian habitats or other sensitive communities, federally protected wetlands, or wildlife movement corridors. The following 16 avoidance and minimization measures are designed to prevent the project from having a potentially significant biological impact. 1. Prior to the start of the project, all construction crew members will attend an environmental awareness training presented by a qualified biologist. A training brochure describing special- status species, project avoidance and avoidance and minimization measures, and key contacts, and potential consequences of impacts to special-status species and potentially jurisdictional water features will be distributed to the crew members during the training.

2. Disturbance to vegetation should be kept to the minimum necessary to complete the project activities, provided there is no feasible alternative. To minimize impacts to vegetation, a qualified biologist shall work with the contractor to designate the work area and any staging areas as well as delineate areas that should be avoided with exclusionary fencing (i.e., high visibility orange construction fencing or silt fence). Areas that would be identified to avoid will include the potentially jurisdictional drainages, except where permits are secured for impacts to potentially jurisdictional features.

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3. If any wildlife is encountered during project activities, said wildlife should be allowed to leave the work area unharmed and a biologist would be able to relocate the wildlife outside of the project limits. All listed wildlife species will be allowed to leave the work area of their own accord and without harassment. Animals should not be picked up or moved in any way.

4. Any and all spoils (e.g., dirt, debris, construction-related materials) generated during project activities shall be placed where they cannot enter the potentially jurisdictional drainages.

5. All exposed soils in the work area (resulting from project activities) shall be stabilized immediately following the completion of work to prevent erosion. Erosion and sediment control Best Management Practices, such as silt fences, straw hay bales, gravel or rock-lined drainages, water check bars, and broadcast straw, can be used. Straw wattles, if used, shall be made of biodegradable fabric (e.g., burlap) and free of monofilament netting. At no time shall silt-laden runoff be allowed to enter the potentially jurisdictional drainages.

6. Ground-disturbing construction activities (e.g., grubbing or grading) should occur during the dry season (June 1 to October 15) to facilitate avoidance of California red-legged frog. Regardless of the season, no construction shall occur within 24 hours following a significant rain event (greater than 1/4 inch in a 24-hour period). Following a significant rain event and the 24-hour drying-out period, a qualified biologist shall conduct a preconstruction survey for California red-legged frog prior to the restart of any project activities.

7. To protect potential burrows, no soil shall be stockpiled on the ground unless it is a paved surface.

8. During project activities, all trash that may attract predators should be properly contained, removed, and disposed of regularly. Following construction, trash/construction debris should be removed from work areas.

9. To assist in excluding California red-legged frogs and San Francisco garter snakes from the work area, an exclusion fence should be installed around the work area prior to the commencement of construction activities. Exclusion fencing should be silt-fence type fencing or equivalent and should not include poly mesh fencing or other similar fencing that could entrap or snag reptiles, amphibians, or other small animals. Exclusion fencing should be installed with the fence stakes placed on the inside of the fencing (closest to the project boundary) to prevent frogs or snakes from using the stakes to maneuver over the fence. The fencing should be maintained until all work has been completed.

10. The number of access routes, number and size of staging areas, and the total area of the activity should be limited to the minimum necessary to complete the project. Routes and boundaries should be clearly demarcated, and these areas should be outside of the potentially jurisdictional drainages.

11. All fueling and maintenance of vehicles and other equipment and staging areas should occur at least 100 feet from the potentially jurisdictional drainages. The owner should ensure that contamination of habitat does not occur during such operations. Prior to the onset of work, the Owner should ensure that there is a plan to allow a prompt and effective response to any accidental spills. All workers should be informed of the importance of preventing spills, and of the appropriate measures to take should a spill occur.

12. Tree removal activities should be conducted outside of nesting bird season. However, if project activities are conducted during nesting bird season (February 15 through September 15),

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preconstruction nest surveys should be conducted in and near the project (within 250 feet for large raptors and 100 feet for all other birds) by a qualified biologist. If nesting is identified during the preconstruction survey, then the project should be modified and/or delayed as necessary to avoid direct take of the identified nests, eggs, and/or young.

13. Tree removal activities should be conducted outside of the over-wintering season for monarch butterfly (roughly mid-October to March). If tree removal is required during the over-wintering season, removal shall not take place when temperatures are 55 degrees Fahrenheit and below (when monarch butterflies are clustered in roost trees due to low temperatures).

14. A biological monitor should conduct a preconstruction survey prior to project work. In addition, the biological monitor should perform a survey during the flowering season for fragrant fritillary to ensure that the species does not occur within the project area and no additional mitigations would be required.

13 564 Magnolia Street Project Biological Resource Evaluation

6 REFERENCES

Baldwin, B., D. Goldman, D. Keil, R. Patterson, T. Rosatti (editors). 2012. The Jepson Manual: Vascular Plants of California. Second edition. Berkeley, California: University of California Press.

Calflora. 2019. Information on California plants for education, research and conservation (Calflora). Berkeley, California. Available at: http://www.calflora.org/topMission.html. Accessed June 18, 2019.

California Native Plant Society (CNPS). 2019. Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Available at: http://cnps.site.aplus.net/cgi- bin/inv/inventory.cgi. Accessed June 18, 2019.

California Natural Diversity Data Base (CNDDB). 2019. Rarefind data for the Half Moon Bay, Montara Mountain, Woodside 7.5-minute U.S. Geological Survey topographic quadrangles.

City of Half Moon Bay. 1993. Local Coastal Program Land Use Plan, Chapter 3: Environmentally Sensitive Habitat Areas. Amended 1993.

———. 2018. Half Moon Bay Municipal Code, Title 18: Zoning.

Holland, Robert F. 1986. Preliminary Descriptions of the Terrestrial Natural Communities of California. Sacramento, California: California Department of Fish and Game.

Jennings, M.R., and M.P. Hayes. 1994. Amphibian and Reptile Species of Concern in California. Sacramento, California: California Department of Fish and Game.

Pelton, E., S. Jepsen, C. Schultz, C. Fallon, and S.H. Black. 2016. State of the Monarch Butterfly Overwintering Sites in California. 40+vi pp. Portland, OR: The Xerces Society for Invertebrate Conservation.

U.S. Army Corps of Engineers (USACE). 2008. A Field Guide to the Identification of Ordinary High Water Mark (OHWM) in the Arid West Region of the United States. Robert W. Lichvar and Shawn M. McColley (editors). Hanover, New Hampshire: ERDC/CRREL TR-08-12. U.S. Army Engineer Research and Development Center.

U.S. Department of Agriculture Natural Resources Conservation Service (NRCS). 2019. Soil Survey GIS Data. Available at: http://websoilsurvey.nrcs.usda.gov/app/HomePage.htm. Accessed June 17, 2019.

U.S. Fish and Wildlife Service (USFWS). 2002. Recovery Plan for the California Red-legged Frog (Rana aurora draytonii). Portland, Oregon: U.S. Fish and Wildlife Service.

———. 2006. San Francisco Garter Snake (Thamnophis sirtalis tetrataenia) 5-year Review: Summary and Evaluation. Sacramento, California: U.S. Fish and Wildlife Service, Sacramento Field Office.

———. 2007. Endangered Species Accounts: San Francisco Garter Snake (Thamnophis sirtalis tetrataenia).

———. 2019a. Critical Habitat Portal. Available at: http://criticalhabitat.fws.gov/. Accessed June 16, 2019.

14 564 Magnolia Street Project Biological Resource Evaluation

———. 2019b. Information for Planning and Conservation (IPaC). Available at: http://ecos.fws.gov/ipac/. Accessed June 16, 2019.

———. 2019c. National Wetlands Inventory. Available at: http://www.fws.gov/wetlands/. Accessed June 18, 2019.

U.S. Geological Survey (USGS). 2019. National Hydrography Dataset GIS Data. Available at: http://nhd.usgs.gov/. Accessed June 18, 2019.

15

APPENDIX A

Photo-Documentation

564 Magnolia Street Project Biological Resource Evaluation

Photograph A-1. View facing northwest showing the project location and adjacent eucalyptus forest.

Photograph A-2. View facing northwest from the paved bike path in the southeast corner of the proposed project area.

A-1 564 Magnolia Street Project Biological Resource Evaluation

Photograph A-3. View of culvert outlet from underneath footbridge to the northeast of the project. View looking east along potentially jurisdictional drainage ditch.

A-2 564 Magnolia Street Project Biological Resource Evaluation

Photo A-4. View facing northwest at the eucalyptus forest Photograph A-5. View of active red-tailed hawk nest within the project area. within the project area, facing northwest.

A-3 564 Magnolia Street Project Biological Resource Evaluation

Photograph A-6. View of red valerian in the potentially jurisdictional drainage ditch, north side of the project.

A-4

APPENDIX B

USFWS Records Results

564 Magnolia Street Project Biological Resource Evaluation

B-1 564 Magnolia Street Project Biological Resource Evaluation

B-2 564 Magnolia Street Project Biological Resource Evaluation

B-3 564 Magnolia Street Project Biological Resource Evaluation

B-4 564 Magnolia Street Project Biological Resource Evaluation

B-5 564 Magnolia Street Project Biological Resource Evaluation

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B-7 564 Magnolia Street Project Biological Resource Evaluation

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B-18

APPENDIX C

CNDDB and CNPS Record List and Consideration for Potential Occurrence in the Biological Study Area

564 Magnolia Street Project Biological Resource Evaluation

Table C-1. Special-Status Species Considered for Potential Occurrence in the Biological Study Area

Legal Status Species Name General Habitat Description Federal/State/ Potential for Occurrence CNPS Status

Natural Communities Northern Coastal Salt Marsh Marsh habitat supporting herbaceous, suffrutescent, salt- -- None: There is no suitable habitat for the species in the tolerant hydrophytes often active in summer and dormant in BSA. winter. Characteristic species include Jaumea carnosa, Limonium californicum, and Frankenia salina. Developed around Humboldt Bay, Tomales Bay, San Francisco Bay, Elkhorn Slough, and Morro Bay. Plants Anderson’s manzanita Perennial evergreen shrub occurs in openings and edges --/--/1B.2 None: BSA does not contain suitable habitat. Species (Arctostaphylos andersonii) among broad-leafed upland forest, chaparral, and North Coast not observed during field survey. Impacts to this species coniferous forest. Elevation: 60–760 meters. Flower season: are not expected. No CNDDB occurrences recorded November–May. within 5 miles of the project. arcuate bush-mallow Perennial evergreen shrub occurs in chaparral and cismontane --/--/1B.2 None: BSA does not contain suitable habitat. Species (Malacothamnus arcuatus) woodland. Elevation: 15–355 meters. Flower season: April– not observed during the field survey, which was September. conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the project. bent-flowered fiddleneck Annual herb occurs in coastal bluff scrub, cismontane --/--/1B.2 None: Species not observed during the field survey, (Amsinckia lunaris) woodland, and valley and foothill grassland. Elevation: 3–500 which was conducted during the appropriate bloom meters. Flower season: March–June period. No CNDDB occurrences recorded within 5 miles of the project. Blasdale's bent grass Perennial rhizomatous herb occurs in coastal bluff scrub, --/--/1B.2 None: Species not observed during the field survey, (Agrostis blasdalei) coastal dunes, coastal prairie. Elevation: 5–150 meters. Flower which was conducted during the appropriate bloom season: May–July. period. No CNDDB occurrences recorded within 5 miles of the project. chaparral ragwort Annual herb occurs in dry coastal areas, particularly alkali flats. --/--/2B.2 None: Species not observed during the field survey. No (Senecio aphanactis) Elevation: 2–706 meters. Flower season: January-April. CNDDB occurrences recorded within 5 miles of the project. Choris' popcorn-flower Annual herb occurs in grassy, moist places; ephemeral --/--/1B.2 None: Species not observed during the field survey, (Astragalus pycnostachyus var. drainages; coastal scrub; and chaparral. Elevation: 0–650 which was conducted during the appropriate bloom pycnostachyus) meters. Flower season: March–June. period. Five CNDDB occurrences have been recorded within 5 miles of the BSA. coast lily Perennial herb occurs in coastal prairie or scrub, peatland, and --/--/1B.1 None: Species not observed during the field survey, (Lilium maritimum) gaps in closed-cone-pine forest. Elevation: 0–150 meters. which was conducted during the appropriate bloom Flower season: May– July. period. No CNDDB occurrences recorded within 5 miles of the project.

C-1 564 Magnolia Street Project Biological Resource Evaluation

Legal Status Species Name General Habitat Description Federal/State/ Potential for Occurrence CNPS Status

coast yellow leptosiphon Annual herb occurs in coastal bluff scrub and coastal prairie. --/--/1B.1 None: BSA does not contain suitable habitat. Species (Leptosiphon croceus) Elevation: 10–150 meters. Flower season: April–May. not observed during the field survey, which was conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the project. coastal marsh milk-vetch Perennial herb that occurs in coastal marshes, seeps, and --/--/1B.2 None: BSA does not contain suitable habitat. Species (Astragalus pycnostachyus var. adjacent sand along the northern and central California coast. not observed during the field survey, which was pycnostachyus) Elevation: 0–150 meters. Flower season: April–October. conducted during the appropriate bloom period. There is one CNDDB occurrence recorded within 2/5 mile of the BSA. coastal triquetrella Moss occurs in coastal bluff scrub or coastal scrub. Elevation: --/--/1B.2 None: BSA does not contain suitable habitat. Species (Triquetrella californica) 10–100 meters. not observed during the field survey. No CNDDB occurrences recorded within 5 miles of the BSA. Crystal Springs lessingia Annual herb occurs in cismontane woodland, coastal scrub, --/--/1B.2 None: BSA is outside of the known elevation range for (Lessingia arachnoidea) and valley and foothill grassland. Elevation: 60–200 meters. this species. Species not observed during the field Flower season: July–October. survey. No CNDDB occurrences recorded within 5 miles of the BSA. Davidson's bush-mallow Perennial deciduous herb occurs in chaparral, cismontane --/--/1B.2 None: BSA is outside of the known elevation range for (Malacothamnus davidsonii) woodland, coastal scrub, and riparian woodland; usually occurs this species. Species not observed during the field in non-wetlands, but occasionally found in wetlands. Elevation: survey. No CNDDB occurrences recorded within 5 miles 185–855 meters. Flower season: June–January. of the BSA. Dudley's lousewort Perennial herb that occurs in chaparral, cismontane woodland, --/--/1B.2 None: BSA does not contain suitable habitat. No (Pedicularis dudleyi) North Coast coniferous forest, and valley and foothill species observed. Impacts to this species are not grasslands. Elevation: 60–900 meters. Flower season: April– expected. June. fragrant fritillary Bulbiferous herb occurs in cismontane woodland, coastal --/--/1B.2 Low: Species not observed during the field survey; (Fritillaria liliacea) prairies, coastal scrub, and valley and foothill grassland; however, the survey was conducted just outside of the equally likely to occur in wetlands or non-wetlands, occasionally bloom period. No CNDDB occurrences recorded within associated with serpentine. Elevation: 3–410 meters. Flower 5 miles of the BSA. Non-native grassland habitat in the season: February–April. BSA may provide low quality habitat for this species. Franciscan onion Perennial bulbiferous herb occurs on dry hillsides. Elevation: 1– --/--/1B.2 None: BSA does not contain suitable habitat. Species (Allium peninsulare var. 60 meters. Flower season: May–June. not observed during the field survey, which was franciscanum) conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the project. Franciscan thistle Perennial herb occurs in broadleafed upland forest, coastal --/--/1B.2 None: Species not observed during the field survey, (Cirsium andrewsii) bluff scrub, coastal prairie, and coastal scrub. Elevation: 0–150 which was conducted during the appropriate bloom meters. Flower season: March–July. period. No CNDDB occurrences recorded within 5 miles of the BSA.

C-2 564 Magnolia Street Project Biological Resource Evaluation

Legal Status Species Name General Habitat Description Federal/State/ Potential for Occurrence CNPS Status

Hall's bush-mallow Perennial evergreen shrub occurs in chaparral and coastal --/--/1B.2 None: BSA does not contain suitable habitat. Species (Malacothamnus hallii) scrub. Elevation: 10–760 meters. Flower season: May– not observed during the field survey, which was September. conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA. Hickman's cinquefoil Perennial herb occurs in coastal bluff scrub, closed-cone FE/SE/1B.1 None: BSA does not contain suitable habitat. Species (Potentilla hickmanii) coniferous forest, meadows and seeps, and marshes and not observed during the field survey, which was swamps. Elevation: 10–149 meters. Flower season: April– conducted during the appropriate bloom period. No August CNDDB occurrences recorded within 5 miles of the BSA. Hillsborough chocolate lily Perennial bulbiferous herb occurs in cismontane woodland and --/--/1B.1 None: BSA is outside of the known elevation range for (Fritillaria biflora var. ineziana) valley and foothill grassland (affinity to serpentine soil). this species. Species not observed during the field Elevation: 150–150 meters. Flower season: March–April survey. Indian Valley bush-mallow Perennial deciduous shrub occurs in chaparral and cismontane --/--/1B.2 None: BSA does not contain suitable habitat and it is (Malacothamnus aboriginum) woodland. Elevation: 150–1700 meters. Flower season: April– outside of the known elevation range for this species. October. Species not observed during the field survey, which was conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA. island rock lichen Foliose lichen found on the bark and wood of hardwoods and --/--/1B.3 None: BSA does not contain suitable habitat and it is (Hypogymnia schizidiata) conifers in closed-cone coniferous forests and chaparral. outside of the known elevation range for this species. Currently only known from the Channel Islands and Baja Species not observed during the field survey. California. Elevation: 360–405 meters. johnny-nip Annual herb occurs in coastal bluff scrub and coastal prairie. --/--/1B.1 None: BSA does not contain suitable habitat. Species (Castilleja ambigua var. Elevation: 0–100 meters. Flower season: May- August. not observed during the field survey, which was ambigua) conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA. Kellogg's horkelia Perennial herb occurs in closed-cone coniferous forest, --/--/1B.1 None: BSA does not contain suitable habitat. Species (Horkelia cuneata var. sericea) chaparral, coastal dunes, and coastal scrub. Elevation: 10–200 not observed during the field survey, which was meters. Flower season: April–September. conducted during the appropriate bloom period. There is one CNDDB occurrence recorded within 1/10 mile of the BSA. Kings Mountain manzanita Perennial evergreen shrub occurs in broad-leafed upland --/--/1B.2 None: BSA does not contain suitable habitat and it is (Arctostaphylos regismontana) forest, chaparral, and North Coast coniferous forest. Elevation: outside of the known elevation range for this species. 305–730 meters. Flower season: January–April Species not observed during the field survey. There is one CNDDB occurrence recorded within 2/5 mile of the BSA.

C-3 564 Magnolia Street Project Biological Resource Evaluation

Legal Status Species Name General Habitat Description Federal/State/ Potential for Occurrence CNPS Status

Marin checker lily Perennial bulbiferous herb occurs in occurs in coastal bluff --/--/1B.1 None: Species not observed during the field survey, (Fritillaria lanceolata var. scrub, coastal prairie, and coastal scrub. Elevation: 15–150 which was conducted during the appropriate bloom tristulis) meters. Flower season: February–May period. No CNDDB occurrences recorded within 5 miles of the BSA. Marin western flax Annual herb associated with serpentine grasslands. Elevation: --/--/1B.1 None: Species not observed during the field survey, (Hesperolinon congestum) 0–200 meters in the northwestern San Francisco Bay Area. which was conducted during the appropriate bloom Flower season: April–August. period. No CNDDB occurrences recorded within 5 miles of the BSA. marsh microseris Perennial herb occurs in closed-cone coniferous forest, --/--/1B.2 None: Species not observed during the field survey, (Microseris paludosa) cismontane woodland, coastal scrub, and valley and foothill which was conducted during the appropriate bloom grassland. Elevation: 5–300 meters. Flower season: April–June period. No CNDDB occurrences recorded within 5 miles of the BSA. Montara manzanita Perennial evergreen shrub occurs in chaparral and coastal --/--/1B.2 None: BSA does not contain suitable habitat and it is (Arctostaphylos montaraensis) scrub. Elevation: 150–500 meters. Flower season: January– outside of the known elevation range for this species. March. Species not observed during the field survey. No CNDDB occurrences recorded within 5 miles of the project. Oregon polemonium Perennial herb occurs in coastal prairie, coastal scrub, and --/--/2.2 None: Species not observed during the field survey, (Polemonium carneum) lower montane coniferous forest. Elevation: 0–1,830 meters. which was conducted during the appropriate bloom Flower season: April–September. period. The most recent CNDDB occurrence within 5 miles of the BSA was recorded in 1916. Ornduff's meadowfoam Annual herb recorded only in one field on the San Mateo --/--1B.1 None: Species not observed during the field survey, (Limnanthes douglasii ssp. County coast. It is the only known site where the four-part which was conducted during the appropriate bloom ornduffii) meadowfoam naturally appears. Elevation: 10–20 meters. period. No CNDDB occurrences recorded within 5 miles Flower season: November–May. of the project. pappose tarplant Annual herb occurs in valley and foothill grassland, marshes --/--/1B.2 None: Species not observed during the field survey, (Centromadia parryi ssp. and swamps, meadows and seeps, coastal prairie, and which was conducted during the appropriate bloom parryi) chaparral. Elevation: 2–420 meters. Flower season: May– period. No CNDDB occurrences recorded within 5 miles November. of the BSA. perennial goldfields Perennial herb from Asteraceae family occurs in coastal bluff --/--/1B.2 None: BSA does not contain suitable habitat. Species (Lasthenia californica ssp. scrub, coastal dunes, and coastal scrub. Elevation: 6–750 not observed during the field survey, which was Macrantha) meters. Flower season: January–November. conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA. Point Reyes bird's-beak Annual herb (hemiparisitic) occurs in marshes and swamps --/--/1B.2 None: BSA does not contain suitable habitat. Species (Cordylanthus maritimus) (coastal salt). Elevation: 0–10 meters. Flower season: June– not observed during the field survey, which was October. conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA.

C-4 564 Magnolia Street Project Biological Resource Evaluation

Legal Status Species Name General Habitat Description Federal/State/ Potential for Occurrence CNPS Status

Point Reyes horkelia Perennial herb occurs in coastal dunes, coastal prairie, and --/--/1B.2 None: Species not observed during the field survey, (Horkelia marinensis) coastal scrub. Elevation: 5–350 meters. Flower season: May– which was conducted during the appropriate bloom September. period. No CNDDB occurrences recorded within 5 miles of the BSA. rose leptosiphon Annual herb occurs in coastal bluff scrub. Elevation: 0–100 --/--/1B.1 None: BSA does not contain suitable habitat. Species (Leptosiphon rosaceus) meters. Flower season: April–July. not observed during the field survey, which was conducted during the appropriate bloom period. There is one CNDDB occurrence recorded within 80 meters of the BSA. saline clover Annual herb occurs in marshes and swamps, vernal pools, and --/--/1B.2 None: BSA does not contain suitable habitat. Species (Trifolium hydrophilum) valley and foothill grasslands (mesic and alkaline soils). not observed during the field survey, which was Elevation: 0–300 meters. Flower season: April–June. conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA. San Francisco Bay spineflower Annual herb occurs on coastal bluff scrub, dunes, prairie, and --/--/1B.2 None: BSA does not contain suitable habitat. Species (Chorizanthe cuspidata var. scrub. Elevation: 3–215 meters. Flower season: April–July. not observed during the field survey, which was cuspidata) conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA. San Francisco campion Perennial herb occurs in coastal bluff scrub, chaparral, coastal --/--/1B.2 None: Species not observed during the field survey, (Silene verecunda ssp. prairie, coastal scrub, and valley and foothill grassland. which was conducted during the appropriate bloom verecunda) Elevation: 30–645 meters. Flower season: March–June. period. The nearest known CNDDB occurrence was recorded approximately 1 mile from the BSA in 1900. San Francisco collinsia Annual herb occurs in closed-cone coniferous forest and --/--/1B.2 None: BSA does not contain suitable habitat. Species (Collinsia multicolor) coastal scrub (affinity to serpentine soil). Elevation: 30–250 not observed during the field survey, which was meters. Flower season: March–May. conducted during the appropriate bloom period. The most recent known CNDDB occurrence within 5 miles of the BSA was recorded in 1893. San Francisco owl's-clover Annual herb occurs in coastal prairie, coastal scrub, and valley --/--/1B.2 None: Species not observed during the field survey, (Triphysaria floribunda) and foothill grassland (affinity to serpentine soil). Elevation: 10– which was conducted during the appropriate bloom 160 meters. Flower season: April–June. period. No CNDDB occurrences recorded within 5 miles of the BSA. San Mateo thorn mint Annual herb occurs in serpentine soils. Elevation 150-300 FE/SE/1B.1 None: Species not observed during the field survey, (Acanthomintha duttonii) meters. Flower season: April-June which was conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA.

C-5 564 Magnolia Street Project Biological Resource Evaluation

Legal Status Species Name General Habitat Description Federal/State/ Potential for Occurrence CNPS Status

San Mateo woolly sunflower Perennial herb occurs in cismontane woodland. Elevation: 45– FE/SE/1B.1 None: BSA does not contain suitable habitat. Species (Eriophyllum latilobum) 150 meters. Flower season: May–June. not observed during the field survey, which was conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA. Scouler's catchfly Perennial her occurs in coastal bluff scrub, coastal prairie, and --/--/2B.2 None: BSA does not contain suitable habitat. Species (Silene scouleri ssp. scouleri) valley and foothill grassland. Elevation: 0-300 meters. Flower not observed during the field survey, which was season: June- August conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA. short-leaved evax Annual herb occurs in coastal bluff scrub and coastal dunes. --/--/1B.2 None: BSA does not contain suitable habitat. Species (Hesperevax sparsiflora var. Elevation: 0–215 meters. Flower season: March–June. not observed during the field survey, which was brevifolia) conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA. western leatherwood Perennial deciduous shrub that occurs in broad-leafed upland --/--/1B.2 None: Species not observed during the field survey. No (Dirca occidentalis) forest, closed-cone coniferous forest, chaparral, cismontane CNDDB occurrences recorded within 5 miles of the woodland, North Coast coniferous forest, riparian forest, and project. riparian woodland. Generally north or northeast facing slopes, mixed-evergreen forest to chaparral, generally in fog belt. Elevation: 50–395 meters. Flower season: January–April. white-rayed pentachaeta Annual herb occurs in cismontane woodland and valley and FE/SE/1B.1 None: BSA is slightly outside of the known elevation (Pentachaeta bellidiflora) foothill grassland. Elevation: 35–620 meters. Flower season: range for this species. Species not observed during the March–May. field survey, which was conducted during the appropriate bloom period. No CNDDB occurrences recorded within 5 miles of the BSA. woodland woolythreads Annual herb occurs in broad-leafed upland forest, chaparral, --/--/1B.2 None: BSA is outside of the known elevation range for (Monolopia gracilens) cismontane woodland, North Coast coniferous forest, and this species. Species not observed during the field valley and foothill grassland. Elevation: 100–1,200 meters. survey, which was conducted during the appropriate Flower season: March–July. bloom period. Amphibians California giant salamander Endemic to California. Uses a wide range of habitats including --/--/-- None: BSA does not contain suitable habitat. Species (Dicamptodon ensatus) temperate forests, rivers, freshwater lakes, and freshwater not observed during the field survey. In 1997, there was marshes. a CNDDB occurrence approximately 80 meters way from the propose project site.

C-6 564 Magnolia Street Project Biological Resource Evaluation

Legal Status Species Name General Habitat Description Federal/State/ Potential for Occurrence CNPS Status

California red-legged frog Inhabit permanent and temporary pools, streams, freshwater FT/SSC Low: Suitable dispersal or estivation habitat for this (Rana draytonii) seeps, and marshes in lowlands and foothills occurring from species occurs in the vicinity of the project. The nearest sea level to 6,500 feet. Use adjacent upland habitat for foraging known CNDDB occurrence was recorded within and refuge. Breed during the wet season from December approximately 300 meters of the BSA. through March. Lay between 300 and 4,000 eggs in a large cluster that are attached to plants near the water surface. Eggs hatch after about 4 weeks and undergo metamorphosis in 4 to 7 months. Reptiles San Francisco garter snake Uses a wide range of habitats; prefers grassland or wetland FE/SE, FP Low: Potential dispersal habitat for this species occurs (Thamnophis sirtalis near ponds, marshes, and sloughs; may overwinter in upland in the vicinity of the project. The nearest known CNDDB tetrataenia) areas away from water. occurrence was recorded approximately 1.4 miles north of the BSA at the mouth of Pilarcitos Creek. Birds American peregrine falcon Forages primarily on birds in urban and natural environments MBTA/FP None: BSA does not contain suitable nesting or (Falco peregrinus anatum) including pasturelands, marshes, mudflats, and tidal zones that foraging habitat. attract large concentrations of shorebirds and other water birds. Nests almost exclusively on protected ledges of high cliffs, but may also use manmade structures, such as tall buildings and bridges, and will occasionally use tree or snag cavities or old nests of other raptors Burrowing owl (Athene Occurs in open, dry, annual or perennial grasslands, deserts MBTA/SSC cunicularia) and scrublands characterized by low-growing vegetation marbled murrelet Pacific seabird winters and forages at sea and breeds in FT, MBTA/SE None: BSA does not contain suitable nesting or (Brachyramphus marmoratus) coniferous forests near coasts. Nest on large horizontal foraging habitat. branches high up in trees that are generally greater than 200 years old. saltmarsh common Frequents low, dense vegetation near water. Nest usually --/SSC None: BSA does not contain suitable nesting or yellowthroat placed on or within 8 centimeters (3 inches) of ground. May be foraging habitat. (Geothlypis trichas sinuosa) over water, in emergent aquatic vegetation, dense shrubs, or other dense growth. western snowy plover Shores, peninsulas, offshore islands, bays, estuaries, and FT, MBTA/SSC None: BSA does not contain suitable nesting or (Charadrius alexandrinus rivers along the Pacific Coast. Breeding sites entail coastal foraging habitat. nivosus) beaches above the high tide line, sand spits, dune-backed beaches, and river bars. Mammals American badger Occurs in herbaceous, shrub, and open stages of most habitats --/SSC None: BSA does not contain suitable nesting or (Taxidea taxus) with dry, friable soils. Uncommon, permanent resident found foraging habitat, and no suitable burrows were observed throughout most of California. in the BSA.

C-7 564 Magnolia Street Project Biological Resource Evaluation

Legal Status Species Name General Habitat Description Federal/State/ Potential for Occurrence CNPS Status

San Francisco dusky-footed Medium-sized rodents found in grasslands, scrub, and wooded --/SSC None: BSA does not contain suitable nesting or woodrat areas throughout the San Francisco Bay area. foraging habitat, and no middens were observed during (Neotoma fuscipes annectens) the field survey. Fish steelhead – central California Clear, cool water with abundant in-stream cover, well-vegetated FT/-- None: BSA does not contain suitable nesting or coast DPS stream margins, relatively stable water flow, and a 1:1 pool-to- foraging habitat. (Oncorhynchus mykiss irideus) riffle ratio. Invertebrates Monarch butterfly Occurs along the coast from northern Mendocino to Baja FC/-- Low: Suitable dispersal habitat occurs within the vicinity (Danaus plexippus) California, Mexico. Winter roosts in wind protected tree groves of the project. In addition, there is a historical CNDDB (eucalyptus, Monterey pine and cypress), with nectar and water occurrence within 0.5 mile of the project. This species sources nearby. was not observed during the biological survey. San Bruno elfin butterfly Inhabits rocky outcroppings and cliffs coastal scrub within the FE/-- None: BSA does not contain suitable habitat, or the (Callophrys mossii bayensis) San Francisco peninsula area. BSA is outside the known range of the species.

Sources: Baldwin et al. (2012), CNDDB (2019), USFWS (2019). Status Codes: -- = No status Federal: FE = Federal Endangered; FT = Federal Threatened; FC = Federal Candidate; MBTA = Protected by Migratory Bird Treaty Act State: SE = State Endangered; ST = State Threatened; SR = State Rare; SSC = California Species of Special Concern; FP = Fully Protected California Native Plant Society (CNPS): List 1B = Rare, threatened, or endangered in California and elsewhere List 2 = Rare, threatened, or endangered in California, but more common elsewhere List 3 = Plants about which more information is needed List 4 = Watch list of plants of limited distribution CNPS Threat Code: _.1 = Seriously endangered in California (more than 80% of occurrences threatened / high degree and immediacy of threat) _.2 = Fairly endangered in California (20–80% occurrences threatened) _.3 = Not very endangered I California (<20% of occurrences threatened or no current threats known) Potential for Occurrence Ratings: None = No potential for the species or habitat to occur due to lack of suitable habitat in the BSA. Low = Species has been mapped within 5 miles of the BSA, but record is old/unreliable, the appropriate habitat is not present, or the record is far from the project area. Moderate = Records have been mapped near the project area and/or suitable habitat is present, but records are old or far from the project area. High = Species has high likelihood of presence in the BSA, has been mapped in close proximity to the project area, and suitable habitat is present.

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APPENDIX D

Species Observed During the Field Survey

564 Magnolia Street Project Biological Resource Evaluation

Table D-1 Species Observed During the Field Survey

Scientific Name Common Name Native Species Status/Notes

PLANT SPECIES* Angiosperms (Eudicots) Anacardiaceae Sumac Family -- -- Toxicodendron diversilobum poison oak Yes -- Asteraceae Sunflower Family -- -- Delairea ordata German Ivy No -- Helminthotheca echioides bristly ox-tongue No -- Fabaceae Pea Family -- -- Medicago polymorpha California burclover No -- Vicia sp. unknown vetch Unknown -- Geraniaceae Geranium Family -- -- Geranium dissectum cut leaved geranium No -- Myrtaceae Myrtle Family -- -- Eucalyptus globulus blue-gum eucalyptus No -- Polygonaceae Buckwheat Family -- -- Rumex crispus Curly dock No -- Rosaceae Rose Family -- -- Rubus ursinus California blackberry Yes -- Tropaeolaceae Nasturtium Family -- -- Tropaeolum majus garden nasturtium No -- Valerianaceae Valerian Family -- -- Centranthus ruber red valerian No -- Angiosperms (monocots) Poaceae Grass Family -- -- Avena barbata slender wild oats No -- Bromus diandrus ripgut brome No -- Festuca perennis Italian rye grass No -- WILDLIFE SPECIES Avian Buteo jamaicensis red-tailed hawk Yes -- Buteo lineatus red-shouldered hawk Yes -- Calypte anna Anna’s hummingbird Yes -- Carpodacus mexicanus house finch Yes -- Cistothorus palustris Marsh wren Yes -- Corvus brachyrhynchos American crow Yes --

* Data from Baldwin et al. (2012).

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APPENDIX E

Special-Status Species Records

564 Magnolia Street Project Biological Resource Evaluation

Figure D-1. CNDDB plant map.

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Figure D-2. CNDDB wildlife map.

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Table D-1. California Natural Diversity Database Records Results

Latin Name Common Name EONDX ACCURACY SITEDATE FEDLIST CALLIST RPLANTRANK

Arctostaphylos montaraensis Montara manzanita 56346 specific area 20130105 None None 1B.2 Astragalus pycnostachyus var. pycnostachyus coastal marsh milk-vetch 49631 2/5 mile 20040823 None None 1B.2 Athene cunicularia Burrowing owl 114464 1/10 mile 20171120 None None Bombus occidentalis western bumble bee 100351 1 mile 19530328 None None Brachyramphus marmoratus marbled murrelet 99414 nonspecific area 20110722 Threatened Endangered Brachyramphus marmoratus marbled murrelet 99411 nonspecific area 2007XXXX Threatened Endangered Charadrius alexandrinus nivosus western snowy plover 104890 80 meters 20160503 Threatened None Danaus plexippus pop. 1 monarch - California overwintering population 12310 2/5 mile 19980105 None None Danaus plexippus pop. 1 monarch - California overwintering population 99755 1/5 mile 19980105 None None Danaus plexippus pop. 1 monarch - California overwintering population 13262 1/5 mile 19980105 None None Danaus plexippus pop. 1 monarch - California overwintering population 22934 1/5 mile 20121028 None None Dicamptodon ensatus California giant salamander 98609 80 meters 19971217 None None Falco peregrinus anatum American peregrine falcon 70079 80 meters 20070515 Delisted Delisted Fritillaria biflora var. ineziana Hillsborough chocolate lily 26561 specific area 20160322 None None 1B.2 Geothlypis trichas sinuosa saltmarsh common yellowthroat 59824 2/5 mile 19900620 None None Geothlypis trichas sinuosa saltmarsh common yellowthroat 13461 1/5 mile 19900602 None None Geothlypis trichas sinuosa saltmarsh common yellowthroat 24807 1/5 mile 19900701 None None Horkelia cuneata var. sericea Kellogg's horkelia 64647 1/10 mile 20000425 None None 1B.1 Lasthenia californica ssp. macrantha perennial goldfields 103072 specific area 20150409 None None 1B.1 Leptosiphon rosaceus rose leptosiphon 95234 80 meters 20140521 None None 1B.1 Monolopia gracilens woodland woollythreads 94197 nonspecific area 20130516 None None 1B.2 Neotoma fuscipes annectens San Francisco dusky-footed woodrat 70792 80 meters 20070910 None None Northern Coastal Salt Marsh Northern Coastal Salt Marsh 26269 1/5 mile 19780321 None None Oncorhynchus mykiss irideus steelhead - central California coast DPS 30141 specific area 19790920 Threatened None Oncorhynchus mykiss irideus steelhead - central California coast DPS 79277 nonspecific area 20000903 Threatened None Oncorhynchus mykiss irideus steelhead - central California coast DPS 41534 80 meters 19990415 Threatened None Plagiobothrys chorisianus var. chorisianus Choris' popcornflower 57049 specific area 20130611 None None 1B.2 Plagiobothrys chorisianus var. chorisianus Choris' popcornflower 94297 nonspecific area 20100604 None None 1B.2 Plagiobothrys chorisianus var. chorisianus Choris' popcornflower 94290 specific area 20070424 None None 1B.2 Plagiobothrys chorisianus var. chorisianus Choris' popcornflower 94292 specific area 20130520 None None 1B.2 Plagiobothrys chorisianus var. chorisianus Choris' popcornflower 94281 specific area 20070731 None None 1B.2 Rana draytonii California red-legged frog 56076 1/5 mile 20040607 Threatened None Rana draytonii California red-legged frog 33319 specific area 20070919 Threatened None Rana draytonii California red-legged frog 78886 specific area 20100305 Threatened None Rana draytonii California red-legged frog 70285 specific area 20061011 Threatened None Rana draytonii California red-legged frog 41133 80 meters 19990507 Threatened None Rana draytonii California red-legged frog 48448 80 meters 20020711 Threatened None Rana draytonii California red-legged frog 68205 80 meters 20070111 Threatened None

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Latin Name Common Name EONDX ACCURACY SITEDATE FEDLIST CALLIST RPLANTRANK

Rana draytonii California red-legged frog 63554 80 meters 20010618 Threatened None Rana draytonii California red-legged frog 42675 nonspecific area 20110913 Threatened None Rana draytonii California red-legged frog 105601 1/10 mile 20160927 Threatened None Silene verecunda ssp. verecunda San Francisco campion 60254 1 mile 19000317 None None 1B.2 Taxidea taxus American badger 114381 nonspecific 20170701 None None Taxidea taxus American badger 114377 80 meters 20180618 None None Thamnophis sirtalis tetrataenia San Francisco garter snake 27531 specific area 20111115 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 93211 nonspecific area 19510318 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 93247 1/5 mile 20040804 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 27538 nonspecific area 20140328 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 27537 1/5 mile 19870505 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 14768 nonspecific area 20130904 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 92745 specific area 20120720 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 27497 specific area 20080413 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 92750 1/10 mile 19380805 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 93271 1/5 mile 1983XXXX Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 92595 1/10 mile 20060815 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 27539 specific area 20120416 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 92603 80 meters 20110505 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 14767 specific area 20130703 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 72663 specific area 20080421 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 93262 1/5 mile 19791226 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 27540 nonspecific area 20060927 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 92744 80 meters 20070413 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 92544 1/10 mile 20070812 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 27485 1/5 mile 198XXXXX Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 55709 80 meters 20040510 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 93280 1/10 mile 20070426 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 64439 specific area 20060215 Endangered Endangered Thamnophis sirtalis tetrataenia San Francisco garter snake 93282 1/10 mile 20070814 Endangered Endangered

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