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- Rivers--Oregon 250
- Forests and forestry 141
- Lumber trade 132
- Mountains--Oregon 101
- Portraits, Group 96
- Lakes--Oregon 77
- Cities and towns 74
- Roads 66
- Agriculture 56
- Waterfalls 56
- Springs 54
- Formations (Geology) 50
- Log transportation 48
- Bridges 46
- Sawmills 41
- Coasts--Oregon 37
- Logging 29
- Railroad tracks 26
- Camps 24
- Dams 24