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Creator
- United States. War Department 29
- Powell, Charles Francis, 1843-1907 5
- Smith, Katherine Louise 4
- United States. Army. Office of the Chief of Engineers 3
- United States. Forest Service 3
- EROS Data Center 2
- Gillespie, G. L. 2
- Michler, N. (Nathaniel), 1827-1881 2
- Prentiss, A. M. (Arthur M.) 2
- United States. Congress. House 2
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Topic
- Bodies of water 120
- Rivers 106
- Northwest, Pacific 102
- Photography 71
- Riparian areas 39
- River engineering 34
- United States. Congress--Records and correspondence 31
- River surveys 29
- Mountains 28
- River channels 22
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Region
- Oregon >> United States 120
- Columbia River >> Clatsop County >> Oregon >> United States 55
- Washington >> United States 55
- Columbia River >> Douglas County >> Washington >> United States 54
- Willamette River >> Multnomah County >> Oregon >> United States 37
- 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
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License
- Creative Commons: Public Domain Mark 1.0 120
Type
- Image 69
- Text 47
- Collection 4
Format
- image/tiff 56
- application/pdf 39
- image/jpeg 21
- application/xml 4