| Flood Impacts |
| 33.3 | Flood waters reach the instrument shelf of the manometer gage house. |
| 30.5 | Flood waters reach the floor of the gage house. |
| 27.4 | This is the RECORD FLOOD LEVEL that was reached on April 30 1996. |
| 26.0 | Major flooding begins. The Dively and Vandalia Levees begin to be overtopped. |
| 24.0 | Moderate flooding begins. |
| 23.0 | Agricultural levee begins to be slightly overtopped. No residences are affected at this level. |
| 18.0 | Flood Stage. Minor flooding begins. Unprotected farmland begins to flood. |