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Creator
- United States. Army. Office of the Chief of Engineers 391
- Freeman, Lewis R. (Lewis Ransome), 1878- 229
- Lorraine, Madison Johnson 225
- United States. War Department 143
- Duniway, Abigail Scott, 1834-1915 102
- Fisk, W. L. (Walter Leslie), 1855- 75
- Harts, W. W. (William Wright), 1866-1961 75
- United States. Bonneville Power Administration 30
- United States. Department of the Interior 30
- Oregon Touring Bureau 27
- Hartshorn, Florence M., 1869-1943 12
- Elliott, T. C. (Thompson Coit), 1862-1943 10
- Rosenthal, Abraham, 1870-1929 6
- Warren, George C., 1877- 6
- Wulzen, Albert Henry 6
- United States. War Department. Office of the Chief of Engineers 5
- Pond, James B. (James Burton), 1889-1961 4
- Smith, Katherine Louise 3
- United States. Bureau of Reclamation 3
- EROS Data Center 2