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Topic
- Celilo Falls (Wash.) 50
- Indians of North America 28
- Waterfalls 25
- Fishing 22
- Footbridges 17
- Fishwheels 16
- Portraits, Group 9
- Columbia River Watershed 8
- Photography 8
- Rapids 8
- Bodies of water 7
- Columbia River 7
- Northwest, Pacific 7
- River engineering 7
- Tipis 7
- Rivers 6
- United States--Appropriations and expenditures 6
- Canals--Design and construction--Costs 4
- Mountains 4
- Riparian areas 4
