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- Dams 25
- Rivers--Washington (State) 17
- Fish weirs 13
- Rivers--Idaho 7
- Fish traps 4
- Rivers--Oregon 4
- Hoisting machinery 3
- Chinook salmon 2
- Lakes 2
- Rivers 2
- Fish stocking 1
- Fishways 1
- Islands--Oregon 1
- Power-plants 1
- Rapids 1
- Spillways 1
- Trucks 1
- Waterfalls 1
