Table 9 to Part 226 - Hydrologic Units and Counties Containing Critical Habitat for Upper Willamette River Chinook Salmon, and Dams/Reservoirs Representing the Upstream Extent of Critical Habitat

Hydrologic Unit nameHydrologic Unit numberCounties1 within Hydrologic Unit and within range of ESUDams/ReservoirsLower Columbia-Sandy17080001Clark (WA)Lower Columbia-Clatskanie17080003Clatsop (OR), Columbia (OR), Cowlitz (WA), Wahkiakum (WA)Lower Columbia17080006Clatsop (OR), Pacific (WA), Wahkiakum (WA)Middle Fork Willamette17090001Douglas (OR), Lane (OR)Coast Fork Willamette17090002Douglas (OR), Lane (OR)Cottage Grove Dam, Dorena DamUpper Willamette17090003Benton (OR), Lane (OR), Lincoln (OR), Linn (OR), Polk (OR)Fern Ridge DamMcKenzie17090004Lane (OR), Linn (OR)Blue River DamNorth Santiam17090005Clackamas (OR), Linn (OR) Marion (OR)Big Cliff DamSouth Santiam17090006Linn (OR)Green Peter DamMiddle Willamette17090007Clackamas (OR), Marion (OR), Polk (OR), Washington (OR), Yamhill (OR)Yamhill17090008Lincoln (OR), Polk (OR), Tillamook (OR), Yamhill (OR)Molalla-Pudding17090009Clackamas (OR), Marion (OR)Tualatin17090010Clackamas (OR), Columbia (OR), Multnomah (OR), Tillamook (OR), Washington (OR), Yamhill (OR)Clackamas17090011Clackamas (OR), Marion (OR)Lower Willamette17090012Clackamas (OR), Columbia (OR), Multnomah (OR)1 Some counties have very limited overlap with estuarine, riverine, and riparian habitats identified as critical habitat for this ESU. Consult USGS hydrologic unit maps (available from USGS) to determine specific county and basin boundaries.