Pacific Northwest Stream Survey
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- Fishways 116
- Dams 107
- Rivers--Oregon 56
- Rivers--Washington (State) 43
- Chinook salmon 9
- Hydroelectric power plants 7
- Power-plants 7
- Spillways 7
- Rivers 3
- Washington Water Power Company 3
- Canals 2
- Fish traps 2
- Flumes 2
- Rivers--Idaho 2
- Salmon 2
- Sawmills 2
- Waterfalls 2
- Culverts 1
- Dams--Idaho 1
- Lakes 1