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Creator
- United States. War Department 49
- United States. Army. Office of the Chief of Engineers 14
- Powell, Charles Francis, 1843-1907 5
- 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 65
- United States. Congress--Records and correspondence 51
- Northwest, Pacific 38
- Bodies of water 34
- Harbors 33
- River surveys 33
- Rivers 30
- River channels 22
- West (U.S.) 17
- Canals 13
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Region
- Washington >> United States 65
- Oregon >> United States 46
- Columbia River >> Douglas County >> Washington >> United States 38
- Willamette River >> Multnomah County >> Oregon >> United States 34
- Snake River >> Franklin County >> Washington >> United States 25
- California >> United States 13
- Coos Bay >> Coos County >> Oregon >> United States 12
- Columbia River >> Clatsop County >> Oregon >> United States 11
- Cowlitz River >> Cowlitz County >> Washington >> United States 7
- Idaho >> United States 7
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Type
- Text 63
- Collection 2