Table 19 to Part 226 - Hydrologic Units and Counties Containing Critical Habitat for Central Valley Steelhead, and Dams/Reservoirs Representing the Upstream Extent of Critical Habitat

Hydrologic Unit nameHydrologic Unit numberCounties1 within Hydrologic Unit and within range of ESUDams/ReservoirsSacramento-Lower Cow-Lower Clear18020101Shasta (CA), Tehama (CA)Lower Cottonwood18020102Shasta (CA), Tehama (CA)Sacramento-Lower Thomes18020103Butte (CA), Glenn (CA), Tehama (CA)Black Butte DamSacramento-Stone Corral18020104Butte (CA), Colusa (CA), Glenn (CA), Sutter (CA), Yolo (CA)Lower Butte18020105Butte (CA), Colusa (CA), Glenn (CA), Sutter (CA)Centerville DamLower Feather18020106Butte (CA), Sutter (CA), Yuba (CA)Oroville DamLower Yuba18020107Yuba (CA)Lower Bear18020108Placer (CA), Sutter (CA), Yuba (CA)Camp Far West DamLower Sacramento18020109Placer (CA), Sacramento (CA), Solano (CA), Sutter (CA), Yolo (CA)Monticello DamLower Cache18020110Yolo (CA)Lower American18020111Placer (CA), Sacramento (CA), Sutter (CA)Nimbus DamSacramento-Upper Clear18020112Shasta (CA)Keswick Dam, Whiskeytown DamCottonwood Headwaters18020113Shasta (CA), Tehama (CA)Upper Elder-Upper Thomes18020114Tehama (CA)Upper Cow-Battle18020118Shasta (CA), Tehama (CA)Mill-Big Chico18020119Butte (CA), Shasta (CA), Tehama (CA)Upper Butte18020120Butte (CA), Tehama (CA)Honcut Headwaters18020124Butte (CA), Yuba (CA)Upper Yuba18020125Yuba (CA), Nevada (CA)Englebright DamUpper Coon-Upper Auburn18020127Placer (CA)Middle San Joaquin-Lower Merced-Lower Stanislaus18040002Calaveras (CA), Merced (CA), San Joaquin (CA), Stanislaus (CA)Crocker Diversion Dam, La Grange DamSan Joaquin Delta18040003Alameda (CA), Contra Costa (CA), Sacramento (CA), San Joaquin (CA)Lower Calaveras-Mormon Slough18040004Calaveras (CA), San Joaquin (CA), Stanislaus (CA)Lower Consumnes-Lower Mokelumne18040005Amador (CA), Sacramento (CA), San Joaquin (CA)Comanche DamUpper Stanislaus18040010Calaveras (CA), San Joaquin (CA), Tuolumne (CA)Goodwin DamUpper Calaveras18040011Calaveras (CA)New Hogan DamPanoche-San Luis Reservoir18040014San Joaquin (CA), Stanislaus (CA)Suisun Bay18050001Contra Costa (CA), Solano (CA)San Pablo Bay18050002Contra Costa (CA), Marin (CA), San Francisco (CA), Solano (CA), Sonoma (CA)San Francisco Bay18050004Alameda (CA), Contra Costa (CA), San Francisco (CA), San Mateo (CA)1 Some counties have very limited overlap with estuarine, riverine, or riparian habitats identified as critical habitat for this ESU. Consult USGS hydrologic unit maps (available from USGS) to determine specific county and basin boundaries.