Dams in Cass County, Illinois
6Total Dams
2High Hazard
1Significant
Dam Safety in Cass County, Illinois
Cass County has 6 dams tracked in the National Inventory of Dams. Of these, 2 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 Cass County is 49 years old. The most common purpose is recreation. The tallest dam is Prairie Lake Dam at 68 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 |
|---|---|---|---|---|---|
| Prairie Lake Dam | High | Not Available | 68 | Recreation | 1999 |
| Drake Lake Dam | High | Not Available | 44 | Fish and Wildlife Pond | 2003 |
| Virginia Lake Dam | Significant | Not Available | 42 | Recreation | 1933 |
| Gridley Dam | Low | Not Available | 51 | Recreation | 1998 |
| Longs Lake Dam | Low | Not Available | 28 | Recreation | 1960 |
| Finger Lake Dam | Low | Not Available | 27 | Fire Protection, Stock, Or Small Fish Pond | 1968 |