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- Railroad bridges 26
- Bridges 17
- Rivers 13
- Railroads 9
- Railroad trains 5
- Construction workers 3
- Building 2
- Passenger trains 2
- Railroad cars 2
- Rivers--Oregon 2
- Wooden bridges 2
- Automobiles 1
- Boats and boating 1
- Building, Brick 1
- Cities and towns 1
- Civilian Conservation Corps (U.S.) 1
- Cliffs 1
- Construction projects 1
- Coos Bay (Or. : Bay) 1
- Cutover lands 1
