Missouri has 6 navigation dams. The dam maintains water levels sufficient for boat and barge traffic, supporting commercial or recreational navigation on the waterway.
| # | Dam | County | Height (ft) | Hazard | Condition | Year |
|---|---|---|---|---|---|---|
| 1 | Mississippi River Lock and Dam 24 | Calhoun | 76 | Significant | Not assessed | 1940 |
| 2 | Mississippi River Lock and Dam 25 | Lincoln | 75 | Significant | Not assessed | 1939 |
| 3 | Mississippi River Lock and Dam 21 | Adams | 48 | Significant | Not assessed | 1938 |
| 4 | Mississippi River Lock and Dam 20 | Adams | 37 | Significant | Not assessed | 1936 |
| 5 | Mississippi River Lock and Dam 22 | Ralls | 32 | Significant | Not assessed | 1938 |
| 6 | Mississippi River Locks and Dam 27 | Madison | 25 | Significant | Not assessed | 1962 |