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- United States. Army. Corps of Engineers 11
Region
- Columbia River >> Douglas County >> Washington >> United States 11
- Oregon >> United States 11
- Washington >> United States 11
- Willamette River >> Multnomah County >> Oregon >> United States 11
- Snake River >> Franklin County >> Washington >> United States 10
- Coos Bay >> Coos County >> Oregon >> United States 5
- Nehalem River >> Tillamook County >> Oregon >> United States 2
- California >> United States 1
- Chehalis River >> Grays Harbor County >> Washington >> United States 1
- Clearwater River >> Nez Perce County >> Idaho >> United States 1
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License
- Creative Commons: Public Domain Mark 1.0 11