Pacific Northwest Stream Survey
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- Rivers--Oregon 477
- Dams 437
- Rivers--Washington (State) 274
- Waterfalls 171
- Rivers--Idaho 121
- Fishways 116
- Rivers 89
- Salmon 65
- Lakes 39
- Fish traps 38
- Canyons 34
- Mountains 28
- Fish weirs 26
- Fishing 26
- Canals 25
- Fish screens 24
- Seining 22
- Valleys 22
- Fishing boats 19
- Sawmills 19