Levees / By county / Mercer County, IL
Levee systems in Mercer County, IL
2 systems on the federal register here, with 459 people recorded behind them.
| System | Location | Accreditation | People | Length |
|---|---|---|---|---|
| Bay Island D&LD No. 1 and Subdistrict No. 1 of Drainage Union No. 1 | Mercer County, Illinois | Non-Accredited | 360 | 25.0 miles |
| Keithsburg Levee | Keithsburg, Mercer County, Illinois | Non-Accredited | 99 | 1.14 miles |
Source: USACE National Levee Database, refreshed 2026-09-10.