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- Bodies of water 27
- Canals--Design and construction--Costs 26
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- Transportation 26
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Region
- Columbia River >> Clatsop County >> Oregon >> United States 27
- Cowlitz River >> Cowlitz County >> Washington >> United States 27
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- Snake River >> Franklin County >> Washington >> United States 25
- Chehalis River >> Grays Harbor County >> Washington >> United States 23
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- Skagit River >> Skagit County >> Washington >> United States 23
- Snohomish River >> Snohomish County >> Washington >> United States 20
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- Collection 5