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Creator
- United States. Army. Office of the Chief of Engineers 176
- United States. War Department 142
- Fisk, W. L. (Walter Leslie), 1855- 76
- Harts, W. W. (William Wright), 1866-1961 76
- Powell, Charles Francis, 1843-1907 5
- Wilson, John M. (John Moulder), 1837-1919 3
- Ballou, William Hosea, 1857-1937 2
- Gillespie, G. L. 2
- Michler, N. (Nathaniel), 1827-1881 2
- United States. Congress. House 2
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Topic
- River engineering 336
- Northwest, Pacific 211
- United States. Congress--Records and correspondence 143
- West (U.S.) 122
- Bodies of water 115
- United States--Appropriations and expenditures 105
- River surveys 95
- Railroad engineering 50
- Rivers 44
- Harbors 34
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 200
- Columbia River >> Clatsop County >> Oregon >> United States 166
- Yamhill River >> Yamhill County >> Oregon >> United States 93
- Snake River >> British Columbia >> Canada 91
- Columbia River >> Douglas County >> Washington >> United States 85
- Cascade Locks >> Hood River County >> Oregon >> United States 80
- Oregon >> United States 75
- Washington >> United States 64
- Portland >> Clackamas County >> Oregon >> United States 46
- Snake River >> Franklin County >> Washington >> United States 30
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License
- Creative Commons: Public Domain Mark 1.0 336
Type
- Text 321
- Collection 15
Format
- image/jpeg 288
- application/pdf 33
- application/xml 15