Table 14 to Part 226 - Hydrologic Units and Counties Containing Critical Habitat for Columbia River Chum Salmon, and Dams/Reservoirs Representing the Upstream Extent of Critical Habitat

Hydrologic Unit nameHydrologic Unit numberCounties1 within Hydrologic Unit and within rangeof ESUDams/ReservoirsLower Columbia - Sandy 17080001 Clark (WA), Skamania (WA), Multnomah (OR) Bonneville DamLewis 17080002 Cowlitz (WA), Clark (WA), Skamania (WA) Merwin DamLower Columbia - Clatskanie 17080003 Wahkiakum (WA), Lewis (WA), Cowlitz (WA), Skamania (WA), Clatsop (OR), Columbia (OR) Lower Cowlitz 17080005 Cowlitz (WA), Lewis (WA), Skamania (WA) Lower Columbia 17080006 Pacific (WA), Wahkiakum (WA), Lewis (WA), Clatsop (OR) Lower Willamette 17090012 Columbia (OR), Multnomah (OR), Washington (OR) 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.