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Creator
- United States. War Department 23
- Powell, Charles Francis, 1843-1907 5
- Wilson, John M. (John Moulder), 1837-1919 3
- Gillespie, G. L. 2
- Michler, N. (Nathaniel), 1827-1881 2
- Jones, William A. (William Albert), 1841-1914 1
Topic
- Bodies of water 23
- River channels 23
- River engineering 23
- Rivers 23
- United States. Congress--Records and correspondence 23
- River surveys 22
- Harbors 14
- Canals 13
- Northwest, Pacific 13
- Rapids 10
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Region
- Columbia River >> Douglas County >> Washington >> United States 23
- Willamette River >> Multnomah County >> Oregon >> United States 23
- Oregon >> United States 22
- Washington >> United States 22
- Snake River >> Franklin County >> Washington >> United States 21
- Coos Bay >> Coos County >> Oregon >> United States 12
- California >> United States 8
- 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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