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Topic
- Canals--Design and construction--Costs 39
- West (U.S.) 34
- Dams--Design and construction 28
- Transportation 27
- Bodies of water 26
- Northwest, Pacific 26
- Rivers 26
- Water resources development 26
- United States--Appropriations and expenditures 10
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Region
- Columbia River >> Clatsop County >> Oregon >> United States 35
- Portland >> Clackamas County >> Oregon >> United States 27
- Willamette River >> Multnomah County >> Oregon >> United States 26
- Chehalis River >> Grays Harbor County >> Washington >> United States 23
- Cowlitz River >> Cowlitz County >> Washington >> United States 23
- Snake River >> Franklin County >> Washington >> United States 22
- Nooksack River >> Whatcom County >> Washington >> United States 21
- Skagit River >> Skagit County >> Washington >> United States 21
- Snohomish River >> Snohomish County >> Washington >> United States 18
- Astoria >> Clatsop County >> Oregon >> United States 12
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- Text 39
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