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- Canals--Design and construction--Costs 44
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- Transportation 31
- Bodies of water 30
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Region
- Columbia River >> Clatsop County >> Oregon >> United States 40
- Portland >> Clackamas County >> Oregon >> United States 32
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- Chehalis River >> Grays Harbor County >> Washington >> United States 26
- Nooksack River >> Whatcom County >> Washington >> United States 25
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- Snohomish River >> Snohomish County >> Washington >> United States 21
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Type
- Text 39
- Collection 5