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- Rivers--Washington (State) 52
- Dams 26
- Rivers 18
- Waterfalls 17
- Rivers--Oregon 15
- Fishways 12
- Canyons 5
- Mountains 5
- Lichens 4
- Fish stocking 2
- Salmon 2
- Bridges 1
- Fish surveys 1
- Fish traps 1
- Gates 1
- Lampreys 1
- Logging 1
- Pack animals (Transportation) 1