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- Rivers 89
- Rivers--Washington (State) 46
- Waterfalls 33
- Rivers--Idaho 21
- Dams 16
- Canyons 8
- Canals 3
- Fishways 3
- Rivers--Oregon 3
- Valleys 3
- Bridges 2
- Fish stocking 2
- Irrigation 2
- Lakes 2
- Alluvial fans 1
- Camps 1
- Capes (Coasts) 1
- Culverts 1
- Flumes 1
- Logging 1