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Creator
- United States. Bonneville Power Administration 3
- United States. Department of the Interior 3
Topic
- Hydroelectric power plants 3
- Water-power 3
- Dams 2
- Industrialization 2
- Northwest, Pacific 2
- Public utilities 2
- Agriculture 1
- Irrigation 1
- Locks (Hydraulic engineering) 1
- Maps 1
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Language
- English 3
Type
- Text 2
- Collection 1