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- Railroad bridges 38
- Columbia River 15
- Hood River (Or. : River) 12
- Landscape photography 9
- Klickitat River (Wash.) 7
- Locomotives 7
- Snow 6
- Iron and steel bridges 5
- Railroad tracks 5
- Dams--Design and construction 4
- Oregon, Eastern 4
- Railroad trains 4
- Rapids 4
- Construction workers 3
- Photography, Stereoscopic 3
- Rivers 2
- Cascade Range 1
- Cities and towns 1
- Coquille River (Or.) 1
- Railroad stations 1