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Topic
- River engineering 4
- United States--Appropriations and expenditures 4
- River surveys 3
- Bridges--Design and construction 1
- Canals--Design and construction--Costs 1
- Dams--Design and construction 1
- Locks (Hydraulic engineering) 1
- Railroad construction & maintenance 1
- United States. Congress--Records and correspondence 1
Region
- Ohio River >> Ballard >> Kentucky >> United States 4
- Columbia River >> Clatsop County >> Oregon >> United States 3
- Astoria >> Clatsop County >> Oregon >> United States 2
- Bellingham Bay >> Whatcom County >> Washington >> United States 2
- Cowlitz River >> Cowlitz County >> Washington >> United States 2
- Eugene >> Lane County >> Oregon >> United States 2
- Mississippi River >> United States 2
- Pacific Ocean >> Earth 2
- Portland >> Clackamas County >> Oregon >> United States 2
- Priest Rapids >> Kittitas County >> Washington >> United States 2
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Type
- Collection 2
- Text 2