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Topic
- Rivers 39
- Bodies of water 30
- West (U.S.) 29
- Northwest, Pacific 27
- Canals--Design and construction--Costs 26
- Dams--Design and construction 26
- Transportation 26
- Water resources development 26
- Waterfalls 5
- Cowlitz River (Wash.) 4
- Fishers 4
- Fishing boats 4
- Fishing 4
- River channels 4
- River engineering 4
- River surveys 4
- Rivers--Washington (State) 4
- United States. Congress--Records and correspondence 4
- Fishing nets 3
- Harbors 3