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Subject
- Navigation improvements3,127
- Hydrographic surveying2,744
- Channels (Hydraulic engineering)2,644
- Cost2,025
- Rivers, creeks, streams, etc2,012
- Dredging1,629
- Harbors and ports1,283
- Dams527
- Locks (Hydraulic engineering)519
- United States. War Dept. Engineer Dept445
- Canals406
- Construction346
- Sand bars and shoals315
- Snags and snagging313
- Piers294
- Financial statements290
- Federal receipts and expenditures272
- United States. Army. Corps of Engineers223
- Water levels221
- Dikes (Engineering)219