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Creator
- United States. War Department 21
- Powell, Charles Francis, 1843-1907 5
- Gillespie, G. L. 2
- Michler, N. (Nathaniel), 1827-1881 2
- Wilson, John M. (John Moulder), 1837-1919 2
- Jones, William A. (William Albert), 1841-1914 1
Topic
- Bodies of water 21
- River channels 21
- River engineering 21
- Rivers 21
- United States. Congress--Records and correspondence 21
- River surveys 20
- Harbors 13
- Canals 12
- Northwest, Pacific 12
- Rapids 9
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Region
- Columbia River >> Douglas County >> Washington >> United States 21
- Snake River >> Franklin County >> Washington >> United States 21
- Willamette River >> Multnomah County >> Oregon >> United States 21
- Oregon >> United States 20
- Washington >> United States 20
- Coos Bay >> Coos County >> Oregon >> United States 12
- California >> United States 7
- Clearwater River >> Nez Perce County >> Idaho >> United States 6
- Idaho >> United States 6
- Cowlitz River >> Cowlitz County >> Washington >> United States 4
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