Dynegy/Havana Station/Cell 1, Polishing P
Illinois — Mason County — TRIB ILLINOIS RIVER
Location
| State | Illinois |
| County | Mason |
| River | TRIB ILLINOIS RIVER |
| Coordinates | 40.27886, -90.07561 |
Physical Characteristics
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 9,200 ft |
| NID Storage | 606 acre-ft |
| Max Storage | 606 acre-ft |
| Surface Area | — |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | October 7, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1993 |
| Primary Purpose | Debris Control |
| Dam Type | Earth |
| Owner Type | Public Utility |
| Owner | DYNEGY MIDWEST GENERATION, INC. |
| Other Name | Havana Sta East Ash Pond System |
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.