8Total Dams
3High Hazard
1Significant
Dam Safety in Union County, Illinois
Union County has 8 dams tracked in the National Inventory of Dams. Of these, 3 are classified as high hazard — meaning failure would probably cause loss of human life. Another 1 carry a significant hazard classification.
The average dam in Union County is 62 years old. The most common purpose is recreation. The tallest dam is Alto Pass Reservoir Dam at 45 ft.
Explore more: Oldest dams in Illinois · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Alto Pass Reservoir Dam | High | Not assessed | 45 | Recreation | 1964 |
| Dongola Lake Dam | High | Not assessed | 34 | Recreation | 1970 |
| Choate Lake Dam | High | Not assessed | 25 | Recreation | 1907 |
| Myers Ranch Farms Pond Dam | Significant | Not assessed | 38 | Recreation | 1997 |
| Rockman Pond Dam 1 | Low | Not assessed | 34 | Fish and Wildlife Pond | 1973 |
| Flamms Lake Dam | Low | Not assessed | 29 | Recreation | |
| Hinz Pond Dam | Low | Not assessed | 26 | Recreation | 1966 |
| Dennys Pond Dam | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1966 |