Prairie State Energy Raw Water Dam
Illinois — Washington County — PERCHED
Location
| State | Illinois |
| County | Washington |
| River | PERCHED |
| Coordinates | 38.28095, -89.68224 |
Physical Characteristics
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 6,900 ft |
| NID Storage | 2,422 acre-ft |
| Max Storage | 2,422 acre-ft |
| Surface Area | 0 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | July 21, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 2010 |
| Primary Purpose | Water Supply |
| Dam Type | Earth |
| Owner Type | Public Utility |
| Owner | PRAIRIE STATE GENERATING COMPANY |
| Other Name | Prairie State Energy/Marissa/Pond 2 Dam |
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.