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Topic
- Dams 14
- Rivers--Oregon 14
- Flood control 6
- Fishes--Conservation 2
- Fishways 2
- Inland water transportation 2
- Irrigation 2
- Salmon 2
- Sawmills 2
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Region
- McKenzie River >> Lane County >> Oregon >> United States 14
- Willamette River >> Multnomah County >> Oregon >> United States 13
- Santiam River >> Marion County >> Oregon >> United States 11
- Lane County >> Oregon >> United States 3
- Bonneville Dam >> Multnomah County >> Oregon >> United States 1
- Columbia River >> Clatsop County >> Oregon >> United States 1
- Grand Coulee Dam >> Okanogan County >> Washington >> United States 1
Institution
- Oregon State University 14
