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Topic
- Bodies of water 1
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- Maps 1
- Northwest, Pacific 1
- River engineering 1
- Rivers 1
- Salmon fisheries 1
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- Water-power 1
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Region
- Columbia River >> Douglas County >> Washington >> United States 1
- Deschutes River >> Sherman County >> Oregon >> United States 1
- Idaho >> United States 1
- Lemhi River >> Lemhi County >> Idaho >> United States 1
- Oregon >> United States 1
- Snake River >> Franklin County >> Washington >> United States 1
- Umatilla River >> Umatilla County >> Oregon >> United States 1
- Washington >> United States 1
- Yakima River >> Benton County >> Washington >> United States 1
Institution
- University of Oregon 1