Prairie State Energy Raw Water Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Illinois |
| County | Washington |
| Nearest City | MARISSA |
| River/Stream | PERCHED |
| Coordinates | 38.28095, -89.68224 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 6,900 ft |
| Year Completed | 2010 (16 years old) |
Storage & Hydraulics
| NID Storage | 2,422 acre-ft |
| Max Storage | 2,422 acre-ft |
| Normal Storage | 1,942 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | PRAIRIE STATE GENERATING COMPANY |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 07/21/2025 |
| Emergency Action Plan | Yes |