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Creator
- United States. Army. Office of the Chief of Engineers 145
- Fisk, W. L. (Walter Leslie), 1855- 76
- Harts, W. W. (William Wright), 1866-1961 76
- Lorraine, Madison Johnson 53
- United States. War Department 14
- Powell, Charles Francis, 1843-1907 2
- United States. Congress. House 2
- Jones, William A. (William Albert), 1841-1914 1
- United States. Bureau of Reclamation 1
- United States. Department of the Interior 1
Topic
- West (U.S.) 217
- Bodies of water 159
- River engineering 122
- Northwest, Pacific 107
- Rivers 99
- Railroad engineering 50
- Explorers 46
- Canals--Design and construction--Costs 38
- United States--Appropriations and expenditures 36
- Transportation 34
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Region
- Columbia River >> Clatsop County >> Oregon >> United States 180
- Willamette River >> Multnomah County >> Oregon >> United States 130
- Yamhill River >> Yamhill County >> Oregon >> United States 85
- Snake River >> British Columbia >> Canada 80
- Cascade Locks >> Hood River County >> Oregon >> United States 77
- Portland >> Clackamas County >> Oregon >> United States 49
- Cowlitz River >> Cowlitz County >> Washington >> United States 34
- Snake River >> Franklin County >> Washington >> United States 34
- Chehalis River >> Grays Harbor County >> Washington >> United States 26
- Skagit River >> Skagit County >> Washington >> United States 25
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Type
- Text 209
- Collection 6
- Image 2
Format
- image/jpeg 194
- application/pdf 15
- application/xml 6
- image/tiff 2