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Region
- Columbia River >> Douglas County >> Washington >> United States 19
- Washington >> United States 9
- Oregon >> United States 8
- Bonneville Dam >> Multnomah County >> Oregon >> United States 5
- Grand Coulee Dam >> Okanogan County >> Washington >> United States 3
- Willamette River >> Multnomah County >> Oregon >> United States 2
- Flathead River >> Sanders County >> Montana >> United States 1
- Idaho >> United States 1
- Montana >> United States 1
- Nevada >> United States 1
- Santiam River >> Marion County >> Oregon >> United States 1
- Skagit River >> Skagit County >> Washington >> United States 1
- Snake River >> Franklin County >> Washington >> United States 1
- Utah >> United States 1
- Wyoming >> United States 1
