Levees / By county / Madison County, IL
Levee systems in Madison County, IL
6 systems on the federal register here, with 143,083 people recorded behind them.
| System | Location | Accreditation | People | Length |
|---|---|---|---|---|
| MESD / Chain of Rocks East Levee System | Madison, Madison County, Illinois | Accredited | 126,735 | 31.8 miles |
| Wood River D&LD Lower System | Roxana, Madison County, Illinois | Accredited | 14,920 | 12.3 miles |
| Wood River D&LD East and West System | Alton, Madison County, Illinois | Accredited | 648 | 2.53 miles |
| Upper Wood River D&LD System | East Alton, Madison County, Illinois | Accredited | 575 | 4.95 miles |
| Chouteau Island / Chain of Rocks West Levee System | Madison, Madison County, Illinois | Non-Accredited | 150 | 13.1 miles |
| Private Levee on Cahokia Creek | Roxana, Madison County, Illinois | Non-Accredited | 55 | 1.33 miles |
Source: USACE National Levee Database, refreshed 2026-09-10.