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Subject
- Reservoirs[remove]102
- Water diversion102
- Irrigation65
- Rivers, creeks, streams, etc53
- Water and water supply47
- Dams42
- Cost37
- Flood control37
- Construction31
- Hydrographic surveying31
- Reclamation of land28
- Legislative amendments26
- Water rights23
- Canals22
- Watersheds18
- Deserts and arid lands17
- Water power17
- Hydroelectric power14
- Irrigation canals and flumes14
- United States. Department of the Interior12