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Topic
- Rivers--Oregon 43
- Dams 14
- Boats 8
- Waterfalls 7
- Flood control 6
- Lichens 5
- Bridges 3
- Salmon 3
- Springs 3
- Bears 2
- Brown, W. S. (Walter Sheldon), 1878- 2
- Fishes--Conservation 2
- Fishways 2
- Forest reserves--Oregon 2
- Hydroelectric power plants 2
- Inland water transportation 2
- Irrigation 2
- Picnics 2
- Portraits, Group 2
- Power-plants 2
