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- Dams 20
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Region
- Columbia River >> Douglas County >> Washington >> United States 20
- Oregon >> United States 20
- Washington >> United States 20
- Bonneville Dam >> Multnomah County >> Oregon >> United States 6
- Flathead River >> Sanders County >> Montana >> United States 1
- Grand Coulee Dam >> Okanogan County >> Washington >> United States 1
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Collection
- Western Waters Digital Library 20