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Creator
- United States. War Department 166
- United States. Army. Office of the Chief of Engineers 6
- Powell, Charles Francis, 1843-1907 5
- Wilson, John M. (John Moulder), 1837-1919 3
- Gillespie, G. L. 2
- Michler, N. (Nathaniel), 1827-1881 2
- United States. Congress. House 2
- Jones, William A. (William Albert), 1841-1914 1
- United States. Department of the Interior 1
Topic
- United States. Congress--Records and correspondence 174
- River engineering 143
- Northwest, Pacific 135
- River surveys 45
- Harbors 34
- Bodies of water 32
- Rivers 32
- Rapids 26
- Bridges--Design and construction 24
- River channels 23
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 99
- Columbia River >> Douglas County >> Washington >> United States 81
- Oregon >> United States 56
- Washington >> United States 55
- Snake River >> Franklin County >> Washington >> United States 30
- California >> United States 13
- Coos Bay >> Coos County >> Oregon >> United States 13
- Columbia River >> Clatsop County >> Oregon >> United States 11
- Portland >> Clackamas County >> Oregon >> United States 11
- Cowlitz River >> Cowlitz County >> Washington >> United States 7
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Type
- Text 170
- Collection 4
Format
- image/jpeg 138
- application/pdf 32
- application/xml 4
