| Flood Impacts |
| 29.0 | This level is expected to be met or exceeded on average once every 500 years. |
| 27.6 | This level is expected to be met or exceeded on average once every 200 years. |
| 27.0 | Sny Island Cell #1 levee is overtopped |
| 26.2 | This level is expected to be met or exceeded on average once every 100 years. |
| 25.0 | Water enters Lock House |
| 24.7 | This level is expected to be met or exceeded on average once every 50 years. |
| 22.9 | This level is expected to be met or exceeded on average once every 25 years. |
| 22.1 | This level is expected to be met or exceeded on average once every 20 years. |
| 20.5 | This level is expected to be met or exceeded on average once every 10 years. |
| 18.2 | This level is expected to be met or exceeded on average once every 5 years. |
| 15.4 | This level is expected to be met or exceeded on average once every 2 years. |
| 13.5 | This is the upper navigational limit for the pool at Lock & Dam 22. |
| 13.4 | This is the target pool for navigation at Lock & Dam 22. |
| 13.0 | This is the lower navigational limit for the pool at Lock & Dam 22. |
| 12.0 | Buildings in unprotected areas are damaged. |
