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- Rivers--Oregon 54
- Dams 20
- Salmon 9
- Fishways 7
- Forests and forestry 4
- Power-plants 3
- Sand bars 3
- Sawmills 3
- Hydroelectric power plants 2
- Lampreys 2
- Rapids 2
- Waterfalls 2
- Fish hatcheries 1
- Flumes 1
- Lakes 1
- Rowboats 1
- Salmon--Artificial spawning 1
- Spillways 1
- Turkeys 1
