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Creator
- United States. War Department 9
- Powell, Charles Francis, 1843-1907 5
- Gillespie, G. L. 2
- Wilson, John M. (John Moulder), 1837-1919 2
- Jones, William A. (William Albert), 1841-1914 1
Topic
- Bodies of water 9
- Canals 9
- River channels 9
- River engineering 9
- River surveys 9
- Rivers 9
- United States--Armed Forces--Organization--Charts, diagrams, etc 9
- United States. Congress--Records and correspondence 9
- Rapids 8
- Northwest, Pacific 7
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Region
- Columbia River >> Douglas County >> Washington >> United States 9
- Oregon >> United States 9
- Washington >> United States 9
- Willamette River >> Multnomah County >> Oregon >> United States 9
- Snake River >> Franklin County >> Washington >> United States 8
- Coos Bay >> Coos County >> Oregon >> United States 4
- Yamhill River >> Yamhill County >> Oregon >> United States 2
- Clearwater River >> Nez Perce County >> Idaho >> United States 1
- Coquille River >> Coos County >> Oregon >> United States 1
- Cowlitz River >> Cowlitz County >> Washington >> United States 1
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