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Creator
- United States. Army. Office of the Chief of Engineers 7
Topic
- River engineering 7
- River surveys 7
- United States--Appropriations and expenditures 7
- Dams--Design and construction 3
- Locks (Hydraulic engineering) 3
- Canals--Design and construction--Costs 2
- Bodies of water 1
- Bridges--Design and construction 1
- Cascade Range 1
- Railroad engineering 1
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Region
- Yamhill River >> Yamhill County >> Oregon >> United States 7
- Willamette River >> Multnomah County >> Oregon >> United States 6
- Astoria >> Clatsop County >> Oregon >> United States 3
- Columbia River >> Clatsop County >> Oregon >> United States 3
- Cowlitz River >> Cowlitz County >> Washington >> United States 3
- Portland >> Clackamas County >> Oregon >> United States 3
- Cascade Locks >> Hood River County >> Oregon >> United States 2
- Celilo Falls (historical) >> Wasco County >> Oregon >> United States 2
- Clackamas Rapids >> Clackamas County >> Oregon >> United States 2
- Corvallis >> Benton County >> Oregon >> United States 2
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License
- Creative Commons: Public Domain Mark 1.0 7
Type
- Text 5
- Collection 2