Western Waters Digital Library
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Topic
- Bodies of water 70
- Rivers 68
- Northwest, Pacific 64
- Government publications 45
- Photography 36
- Riparian areas 26
- West (U.S.) 26
- Canals--Design and construction--Costs 19
- Dams--Design and construction 19
- Transportation 19
- Water resources development 19
- Mountains 16
- River engineering 14
- River surveys 14
- United States. Congress--Records and correspondence 14
- River channels 13
- Harbors 11
- Bridges--Design and construction 8
- Rapids 8
- Canals 7