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Creator
- United States. War Department 6
- United States. Bureau of Reclamation 2
- Doerksen, Harvey R. 1
- Jones, William A. (William Albert), 1841-1914 1
- Powell, Charles Francis, 1843-1907 1
- United States. Army. Corps of Engineers 1
- United States. Army. Office of the Chief of Engineers 1
- United States. Department of the Interior 1
- Volkman, John M. 1
Region
- Idaho >> United States 13
- Washington >> United States 13
- Columbia River >> Douglas County >> Washington >> United States 12
- Oregon >> United States 12
- Snake River >> Franklin County >> Washington >> United States 8
- Willamette River >> Multnomah County >> Oregon >> United States 7
- Clearwater River >> Nez Perce County >> Idaho >> United States 6
- Coos Bay >> Coos County >> Oregon >> United States 6
- Cowlitz River >> Cowlitz County >> Washington >> United States 4
- Montana >> United States 4
- more »
License
- Creative Commons: Public Domain Mark 1.0 13