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- Rivers--Oregon 167
- Fishing 20
- Waterfalls 15
- Paddle steamers 12
- Dams 9
- Bridges 8
- Fish hatcheries 8
- Bohlman, Herman 6
- Fishwheels 6
- Formations (Geology) 6
- Indians of North America 6
- Salmon 6
- Canoes and canoeing 5
- Cities and towns 5
- Geese 5
- Mountains--Oregon 5
- Ships 5
- Fishways 4
- Portraits, Group 4
- Spillways 4