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Topic
- Dams--Design and construction 2
- Locks (Hydraulic engineering) 2
- River engineering 2
- River surveys 2
- United States--Appropriations and expenditures 2
- Canals--Design and construction--Costs 1
Region
- Astoria >> Clatsop County >> Oregon >> United States 2
- Columbia River >> Clatsop County >> Oregon >> United States 2
- Oregon City >> Clackamas County >> Oregon >> United States 2
- Willamette River >> Multnomah County >> Oregon >> United States 2
- Yamhill River >> Yamhill County >> Oregon >> United States 2
- Alsea River >> Lincoln County >> Oregon >> United States 1
- Asotin County >> Washington >> United States 1
- Bellingham Bay >> Whatcom County >> Washington >> United States 1
- Cascade Locks >> Hood River County >> Oregon >> United States 1
- Celilo Falls (historical) >> Wasco County >> Oregon >> United States 1
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Type
- Collection 1
- Text 1
Decade
- 1890-1899 2