Narrow your results by:
- All
- Railroad tracks, 5 results
- Dams--Design and construction, 5 results
- Railroad facilities, 5 results
- glass plate negatives, 4 results
- Dams--Oregon, 4 results
- Flumes, 2 results
- cellulose nitrate film, 1 results
- Carts & wagons, 1 results
- Rivers--Oregon, 1 results
- Hydroelectric power plants, 1 results