Wisconsin has 7 navigation dams, of which 1 carry a high hazard classification. 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 9 | Allamakee | 46 | Significant | Not assessed | 1937 |
| 2 | Mississippi River Lock and Dam 8 | Houston | 42 | Significant | Not assessed | 1937 |
| 3 | Mississippi River Lock and Dam 4 | Wabasha | 42 | Significant | Not assessed | 1935 |
| 4 | Mississippi River Lock and Dam 6 | Winona | 40 | Significant | Not assessed | 1936 |
| 5 | Mendota Locks | Dane | 16 | High | Satisfactory | 1849 |
| 6 | Lake Kegonsa | Dane | 10 | Low | Fair | 1938 |
| 7 | Lake Waubesa | Dane | 10 | Low | Fair | 1938 |