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- Dams--Design and construction 104
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Region
- Columbia River >> Clatsop County >> Oregon >> United States 30
- Portland >> Clackamas County >> Oregon >> United States 28
- Willamette River >> Multnomah County >> Oregon >> United States 28
- Cowlitz River >> Cowlitz County >> Washington >> United States 24
- Chehalis River >> Grays Harbor County >> Washington >> United States 23
- Snake River >> Franklin County >> Washington >> United States 23
- Nooksack River >> Whatcom County >> Washington >> United States 22
- Skagit River >> Skagit County >> Washington >> United States 22
- Snohomish River >> Snohomish County >> Washington >> United States 18
- Astoria >> Clatsop County >> Oregon >> United States 13
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- University of Oregon 104