| Flood Impacts |
| 25.0 | Water levels reach the top of the emergency dike. |
| 24.0 | Water overtops the levees downtown. |
| 22.0 | Water levels reach the designed dike protection level. |
| 20.8 | The water reaches the flood of record set in 1965. |
| 20.5 | Railroad lines go under water. |
| 17.1 | Lock and dam 5 goes out of operation. |
| 17.0 | Some railroad lines may become inoperative. |
| 16.6 | Lock and Dam 6 goes out of operation. |
| 16.0 | Lock and Dam 5A goes out of operation. |
| 13.0 | Prairie Island Park begins to flood. Pumping operations are underway by the City of Winona, and dike patrols are started. |
