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- Rivers--Washington (State) 303
- Dams 137
- Waterfalls 65
- Rivers 46
- Fishways 43
- Fish traps 37
- Salmon 21
- Rivers--Oregon 20
- Chinook salmon 17
- Fish stocking 13
- Canyons 12
- Rivers--Idaho 8
- Spillways 8
- Footbridges 7
- Steelhead (Fish) 7
- Chum salmon 6
- Canals 4
- Fish screens 4
- Fishing 4
- Rapids 4
