Levees / By county / Monroe County, IL
Levee systems in Monroe County, IL
3 systems on the federal register here, with 6,678 people recorded behind them.
| System | Location | Accreditation | People | Length |
|---|---|---|---|---|
| Prairie du Pont / Fish Lake System | Dupo, St. Clair County, Illinois | Accredited | 6,052 | 15.4 miles |
| Harrisonville / Stringtown / Ft Chartres Levee System | Maeystown, Monroe County, Illinois | Non-Accredited | 510 | 34.3 miles |
| Columbia Drainage & Levee District No.3 System | Monroe County, Illinois | Non-Accredited | 116 | 20.0 miles |
Source: USACE National Levee Database, refreshed 2026-09-10.