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Subject
- Navigation improvements3,917
- Hydrographic surveying3,697
- Channels (Hydraulic engineering)3,563
- Cost2,801
- Rivers, creeks, streams, etc2,636
- Dredging2,027
- Harbors and ports1,747
- United States. War Dept. Engineer Dept735
- Dams706
- Locks (Hydraulic engineering)643
- Canals575
- Financial statements572
- Construction552
- Flood control551
- Federal receipts and expenditures527
- United States. Army. Corps of Engineers398
- Piers380
- Snags and snagging366
- Sand bars and shoals349
- Dikes (Engineering)302