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Creator
- United States. War Department 52
- United States. Army. Office of the Chief of Engineers 17
- 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 76
- United States. Congress--Records and correspondence 55
- Northwest, Pacific 46
- River surveys 38
- Bodies of water 34
- Rivers 33
- River channels 26
- Harbors 22
- West (U.S.) 17
- Canals 16
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Region
- Oregon >> United States 76
- Columbia River >> Douglas County >> Washington >> United States 48
- Washington >> United States 46
- Willamette River >> Multnomah County >> Oregon >> United States 45
- Snake River >> Franklin County >> Washington >> United States 24
- Columbia River >> Clatsop County >> Oregon >> United States 18
- California >> United States 13
- Coos Bay >> Coos County >> Oregon >> United States 12
- Cowlitz River >> Cowlitz County >> Washington >> United States 7
- Idaho >> United States 7
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Rights
- No Copyright - United States 76
Type
- Text 72
- Collection 4