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- Rivers--Oregon 80
- Dams 53
- Canals 16
- Flood control 9
- Fishways 6
- Salmon 6
- Fish screens 4
- Irrigation 4
- Sawmills 4
- Fishes--Conservation 3
- Power-plants 3
- Rowboats 3
- Boats 2
- Hydroelectric power plants 2
- Inland water transportation 2
- Lectures and lecturing 2
- Oregon Wildlife Federation 2
- Portraits, Group 2
- Waterfalls 2
- Bodies of water 1