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Biological Resource Evaluation for Poplar Pedestrian Pathway

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Biological Resource Evaluation for Poplar Pedestrian Pathway Biological Resources Evaluation for the Poplar Street Pedestrian Pathway Project, Half Moon Bay, San Mateo County, California APRIL 2021 PREPARED FOR City of Half Moon Bay PREPARED BY SWCA Environmental Consultants BIOLOGICAL RESOURCES EVALUATION FOR THE POPLAR STREET PEDESTRIAN PATHWAY PROJECT, HALF MOON BAY, SAN MATEO COUNTY, CALIFORNIA Prepared for City of Half Moon Bay 501 Main Street Half Moon Bay, California 94019 Attn: Maziar Bozorginia, City Engineer Prepared by SWCA Environmental Consultants 60 Stone Pine Road Suite 100 Half Moon Bay, California 94019 (650) 440-4160 www.swca.com SWCA Project No. 65276 April 2021 Poplar Street Pedestrian Pathway Project Biological Resources Evaluation EXECUTIVE SUMMARY The City of Half Moon Bay (City) is proposing the Poplar Street Pedestrian Pathway Project (Project), which includes removing an existing paved pedestrian pathway that is in need of replacement, widening the pathway from its current width of 8 feet to a maximum width of 12 feet, and installing a new paved surface for the pathway between approximately Railroad Boulevard and the Half Moon Bay Coastal Trail in the City of Half Moon Bay, San Mateo County, California. The City retained SWCA Environmental Consultants (SWCA) to provide environmental support services, including conducting a biological resources survey and preparing a Biological Resources Evaluation (BRE), in support of the Project. The purpose of this BRE is to document the biological resources within the Project biological study area (BSA). For the purposes of this report, the BSA consists of the Project footprint (Project area) and an adjacent 200-foot buffer. SWCA conducted a literature review of existing sources of information regarding occurrences of special-status species and sensitive resources near the BSA. One field survey was conducted within the BSA to document biological resources, including special-status plant and wildlife species, potentially jurisdictional wetlands and other waters, and Coastal Resource Areas (CRAs) as defined by the City of Half Moon Bay Zoning Code and Land Use Plan. Based on the results of the literature review and field surveys, the BSA contains non-native grassland, northern coastal scrub, and vernal marsh areas—which would be considered jurisdictional under the California Coastal Commission and sensitive CRAs. One intermittent roadside drainage ditch occurs immediately south of and parallel to the Project area. Additionally, one drainage swale occurs at the west end of the Project area, where it extends beneath an existing wooden bridge that bisects the pedestrian path. Due to the characteristics of the ditch and swale, these conveyances are likely not considered jurisdictional under the U.S. Army Corps of Engineers (USACE) or California Department of Fish and Wildlife (CDFW), but may be under the jurisdiction of the Regional Water Quality Control Board (RWQCB). The BSA also has potential to support three special-status plant species—Choris’ popcorn flower (Plagiobothrys chorisianus var. chorisianus, coastal marsh milk-vetch (Astragalus pycnostachyus var. pycnostachyus), and perennial goldfields (Lasthenia californica ssp. macrantha)—and two special-status wildlife species—California red-legged frog (Rana draytonii) and San Francisco garter snake (Thamnophis sirtalis tetrataenia). U.S. Fish and Wildlife Service (USFWS)-designated critical habitat for California red-legged frog and western snowy plover (Charadrius alexandrinus nivosus) is located approximately 1.5 miles northeast and 0.7 mile north, respectively, of the BSA; however, no critical habitat is located within the BSA. Non-native grassland, coastal scrub, and vernal marsh habitat observed in the BSA provide suitable nesting and foraging habitat for nesting birds covered under the Migratory Bird Treaty Act (MBTA) and California Fish and Game Code (CFGC). i Poplar Street Pedestrian Pathway Project Biological Resources Evaluation This page intentionally left blank. ii Poplar Street Pedestrian Pathway Project Biological Resources Evaluation CONTENTS Executive Summary ..................................................................................................................................... i 1 Introduction .......................................................................................................................................... 1 1.1 Purpose of Biological Resources Evaluation ................................................................................ 1 1.2 Project Location and Description ................................................................................................. 1 2 Regulatory Setting ................................................................................................................................ 1 2.1 Federal .......................................................................................................................................... 1 2.1.1 Clean Water Act .................................................................................................................. 1 2.1.2 Endangered Species Act ..................................................................................................... 4 2.1.3 Migratory Bird Treaty Act .................................................................................................. 4 2.2 State .............................................................................................................................................. 5 2.2.1 California Endangered Species Act .................................................................................... 5 2.2.2 California Fish and Game Code .......................................................................................... 5 2.2.3 California Species of Special Concern ............................................................................... 6 2.2.4 Porter-Cologne Water Quality Control Act ........................................................................ 6 2.3 Local ............................................................................................................................................. 6 2.3.1 California Coastal Act and City of Half Moon Bay Local Coastal Program ...................... 6 3 Methodology .......................................................................................................................................... 7 3.1 Literature and Records Review .................................................................................................... 7 3.1.1 Special-Status Plant Species ............................................................................................... 7 3.1.2 Special-Status Animal Species ........................................................................................... 8 3.2 Field Survey .................................................................................................................................. 8 4 Results.................................................................................................................................................. 11 4.1 Soils, Topography, and Elevation ............................................................................................... 11 4.2 Vegetation Communities ............................................................................................................ 11 4.2.1 Non-Native Annual Grassland .......................................................................................... 11 4.2.2 Northern Coastal Scrub ..................................................................................................... 11 4.2.3 Vernal Marsh .................................................................................................................... 12 4.2.4 Ruderal / Disturbed ........................................................................................................... 12 4.2.5 Urban ............................................................................................................................... 12 4.3 Critical Habitat ........................................................................................................................... 13 4.4 Special-Status Species with Potential to Occur .......................................................................... 13 4.4.1 Special-Status Plant Species ............................................................................................. 13 4.4.2 Special-Status Animal Species ......................................................................................... 15 4.5 Nesting Migratory Passerine Birds and Raptors ......................................................................... 17 4.6 Wildlife Habitat and Movement Corridors ................................................................................. 17 4.7 Coastal Resource Areas .............................................................................................................. 17 4.7.1 Riparian Areas and Corridors ........................................................................................... 17 4.7.2 Coastal Freshwater Marsh................................................................................................. 18 4.7.3 Habitats Containing or Supporting Unique Species or Any Rare and Endangered Species .............................................................................................................................. 18 4.8 Wetlands, Floodplains, and Waters of the U.S. .........................................................................
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