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- Northwest, Pacific 29
- Bodies of water 27
- Rivers 27
- Transportation 27
- Canals--Design and construction--Costs 26
- Water resources development 26
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Region
- Chehalis River >> Grays Harbor County >> Washington >> United States 29
- Columbia River >> Clatsop County >> Oregon >> United States 26
- Snake River >> Franklin County >> Washington >> United States 25
- Willamette River >> Multnomah County >> Oregon >> United States 25
- Cowlitz River >> Cowlitz County >> Washington >> United States 24
- Nooksack River >> Whatcom County >> Washington >> United States 24
- Skagit River >> Skagit County >> Washington >> United States 24
- Portland >> Clackamas County >> Oregon >> United States 23
- Snohomish River >> Snohomish County >> Washington >> United States 20
- Astoria >> Clatsop County >> Oregon >> United States 11
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Type
- Text 25
- Collection 4