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Creator
- United States. War Department 23
- Powell, Charles Francis, 1843-1907 4
- Gillespie, G. L. 1
Topic
- Bridges--Design and construction 23
- United States. Congress--Records and correspondence 23
- Northwest, Pacific 21
- Bodies of water 6
- River channels 6
- River engineering 6
- River surveys 6
- Rivers 6
- Canals 5
- Harbors 5
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 22
- Columbia River >> Douglas County >> Washington >> United States 6
- Oregon >> United States 6
- Snake River >> Franklin County >> Washington >> United States 6
- Washington >> United States 6
- Coos Bay >> Coos County >> Oregon >> United States 4
- Nehalem River >> Tillamook County >> Oregon >> United States 2
- Clearwater River >> Nez Perce County >> Idaho >> United States 1
- Cowlitz River >> Cowlitz County >> Washington >> United States 1
- Idaho >> United States 1
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Type
- Text 22
- Collection 1