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- River engineering 3
- United States--Appropriations and expenditures 3
- Bodies of water 1
- Bridges--Design and construction 1
- Canals--Design and construction--Costs 1
- Dams--Design and construction 1
- Locks (Hydraulic engineering) 1
- Railroad construction & maintenance 1
- Railroad engineering 1
- River surveys 1
- United States. Congress--Records and correspondence 1