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Creator
- United States. War Department 28
- United States. Army. Corps of Engineers 7
- Powell, Charles Francis, 1843-1907 5
- United States. Army. Office of the Chief of Engineers 4
- Gillespie, G. L. 2
- Michler, N. (Nathaniel), 1827-1881 2
- United States. Commodity Stabilization Service 2
- United States. Congress. House 2
- United States. Department of the Interior 2
- WAC Corp. 2
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Topic
- Bodies of water 88
- Rivers 80
- Northwest, Pacific 71
- River engineering 34
- Photography 31
- United States. Congress--Records and correspondence 30
- River surveys 29
- Riparian areas 23
- River channels 22
- Harbors 21
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Region
- Washington >> United States 88
- Columbia River >> Douglas County >> Washington >> United States 82
- Oregon >> United States 72
- Willamette River >> Multnomah County >> Oregon >> United States 33
- Snake River >> Franklin County >> Washington >> United States 25
- California >> United States 13
- Coos Bay >> Coos County >> Oregon >> United States 12
- Idaho >> United States 10
- San Francisco Bay >> San Mateo County >> California >> United States 7
- Clearwater River >> Nez Perce County >> Idaho >> United States 6
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Type
- Image 46
- Text 41
- Collection 1
Format
- application/pdf 37
- image/jpeg 25
- image/tiff 25
- application/xml 1