Prairie Lake Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Illinois |
| County | Cass |
| Nearest City | CHANDLERVILLE |
| River/Stream | TRIB COX CREEK |
| Coordinates | 39.99641, -90.05851 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 68 ft |
| Dam Height | 68 ft |
| Dam Length | 820 ft |
| Year Completed | 1999 (27 years old) |
Storage & Hydraulics
| NID Storage | 6,085 acre-ft |
| Max Storage | 6,085 acre-ft |
| Normal Storage | 3,381 acre-ft |
| Surface Area | 210 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 9,846 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | ILLINOIS DEPARTMENT OF NATURAL RESOURCES |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 04/19/2023 |
| Emergency Action Plan | Yes |