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4/17/20 (P:\TER2001\BA\Special‐Status Species Biological Resources Habitat Assessment 4‐17‐20 .docx) 2 Species Status (Federal/State) Habitat Potential for Occurrencea North American green sturgeon (southern DPS) Acipenser medirostris FT/– Near shore marine waters, bays and estuaries, spawns in rivers in deep fast water over large cobbles, but also clean sand to bedrock. Southern most spawning population in the Sacramento River. Potential foraging habitat is present in the tidal slough, but spawning habitat is absent. Critical Habitat has been designated in the San Francisco Bay, but not all of the primary constituent elements (food resources, water flow to migrate upstream to spawning grounds, water quality, migratory corridor, depth, sediment quality) are present within the slough. White sturgeon Acipenser transmontanus –/SSC Estuaries, including the San Francisco Bay, but spawn in large rivers; only known to spawn in the Sacramento River system, Columbia River in Washington, and Fraser River in Canada. Potential foraging habitat is present in the tidal slough, but does not spawn with the tidal sloughs of San Francisco Bay. Known to occur in San Francisco Bay (Moyle 2012; Leidy 2007). Pacific lamprey Entosphenus tridentatus –/SSC Coastal streams and estuaries, including the San Francisco Bay; spawns in higher‐gradient, cool‐ water streams with gravel beds. Potential foraging habitat is present in the tidal slough, but spawning habitat is absent. Known to occur in San Francisco Bay (Moyle 2012; Leidy 2007). Steelhead (Central California coast DPS) Oncorhynchus mykiss FT/– Coastal streams from Russian River south to Aptos Creek (Santa Cruz Co.), including streams tributary to San Francisco and San Pablo Bays. Although suitable spawning habitat is absent in the slough, occasional stray individuals could occur. Critical Habitat has been designated in the San Francisco Bay, but the primary constituent elements (spawning and rearing habitat, etc.) are not present within the slough. Steelhead (Central Valley DPS) Oncorhynchus mykiss FT/– Sacramento and San Joaquin Rivers and their tributaries. Although suitable spawning habitat is absent in the slough, occasional stray individuals could occur. Chinook salmon (Central Valley spring‐run ESU) Oncorhynchus tshawytscha FT/– Anadromous: spawns in Sacramento River system; occurs in small numbers in Central Bay. Although suitable spawning habitat is absent in the slough, occasional stray individuals could occur. Chinook salmon (Sacramento River winter‐ run ESU) Oncorhynchus tshawytscha FE/– Anadromous: spawns in Sacramento River system; occurs in small numbers in Central Bay. Although suitable spawning habitat is absent in the slough, occasional stray individuals could occur. Coho salmon ‐ central California coast ESU Oncorhynchus kisutch FE/SE Anadromous: spawns in coastal streams in fall and winter. Although suitable spawning habitat is absent in the slough, occasional stray individuals could occur. Amphibians California red‐legged frog Rana draytonii FT/– Creeks, ponds, marshes. Prefers aquatic habitat with deep (2 feet or deeper) areas with undercut banks, emergent aquatic vegetation, and bank cover. Does not occur in salt marshes or wetland with brackish water. No suitable habitat is present. The isolation of the project site from nearby areas of occurrence by heavily traveled roadways, developed landscapes, and marine waters, and salt marsh (all barriers to dispersal for frogs) would preclude dispersing individuals from reaching the project site.