Dams in Mercer County, Illinois
13Total Dams
0High Hazard
4Significant
Dam Safety in Mercer County, Illinois
Mercer County has 13 dams tracked in the National Inventory of Dams. Another 4 carry a significant hazard classification.
The average dam in Mercer County is 63 years old. The most common purpose is recreation. The tallest dam is Fyre Lake Dam at 53 ft.
Explore more: Oldest dams in Illinois · Tallest dams · High risk dams · Largest reservoirs
Data note: Hazard potential describes the consequences if a dam failed; it does not predict the likelihood of failure. Inspection, condition, and emergency-plan fields can be incomplete or delayed. Check state dam-safety officials and local emergency managers for official guidance.
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Fyre Lake Dam | Significant | Not Available | 53 | Recreation | 1972 |
| Karl Lake Dam | Significant | Not Available | 50 | Recreation | 1974 |
| Morrison Lake Dam | Significant | Not Available | 33 | Recreation | 1965 |
| Matherville Lagoons Dam | Significant | Not Available | 9 | Other | |
| Swearington Lake Dam | Low | Not Available | 39 | Other | 1973 |
| Mccaw Pond Dam | Low | Not Available | 38 | Flood Risk Reduction | 1952 |
| Lake Matherville Dam | Low | Not Available | 37 | Recreation | 1926 |
| Irwin Lake Dam | Low | Not Available | 34 | Recreation | 1965 |
| Renee Lake Dam | Low | Not Available | 32 | Recreation | 1973 |
| Dellitt Lake Dam | Low | Not Available | 31 | Recreation | 1975 |
| Fools Lake Dam | Low | Not Available | 28 | Recreation | 1960 |
| Weinmister Pond Dam | Low | Not Available | 28 | Fish and Wildlife Pond | 1978 |
| Lake Nelson Dam | Low | Not Available | 14 | Other | 1937 |