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Creator
- United States. War Department 51
- Powell, Charles Francis, 1843-1907 5
- Ballou, William Hosea, 1857-1937 2
- Gillespie, G. L. 2
- Michler, N. (Nathaniel), 1827-1881 2
- United States. Congress. House 2
- Wilson, John M. (John Moulder), 1837-1919 2
- Jones, William A. (William Albert), 1841-1914 1
- Volkman, John M. 1
Topic
- River engineering 58
- United States. Congress--Records and correspondence 52
- Northwest, Pacific 44
- Rivers 33
- Bodies of water 31
- River surveys 29
- River channels 26
- Harbors 22
- Canals 16
- West (U.S.) 14
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Region
- Oregon >> United States 58
- Columbia River >> Douglas County >> Washington >> United States 47
- Willamette River >> Multnomah County >> Oregon >> United States 38
- Washington >> United States 36
- Snake River >> Franklin County >> Washington >> United States 24
- California >> United States 13
- Coos Bay >> Coos County >> Oregon >> United States 12
- Idaho >> United States 7
- San Francisco Bay >> San Mateo County >> California >> United States 7
- Clearwater River >> Nez Perce County >> Idaho >> United States 6
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Language
- English 58
Type
- Text 55
- Collection 3