Lake Petersburg Dam
Illinois — Menard County — TRIB SANGAMON RIVER
Location
| State | Illinois |
| County | Menard |
| River | TRIB SANGAMON RIVER |
| Coordinates | 39.98943, -89.84794 |
Physical Characteristics
| NID Height | 85 ft |
| Dam Height | 85 ft |
| Dam Length | 1,300 ft |
| NID Storage | 6,703 acre-ft |
| Max Storage | 6,703 acre-ft |
| Surface Area | — |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | March 20, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1961 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | LAKE PETERSBURG ASSOCIATION |
| Other Name | Lake Petersburg |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.