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- Salmon 65
- Rivers--Oregon 22
- Rivers--Washington (State) 20
- Dams 19
- Fishing 10
- Fish traps 8
- Seining 8
- Fish hatcheries 5
- Waterfalls 4
- Fish stocking 3
- Sand bars 3
- Sawmills 3
- Diseases 2
- Fishways 2
- Lakes 2
- Steelhead (Fish) 2
- Canals 1
- Fish surveys 1
- Hydroelectric power plants 1
- Power-plants 1