Dynegy/Havana Sta/East Ash Pond Dam
Illinois, Mason County, TRIB ILLINOIS RIVER
Location
| State | Illinois |
| County | Mason |
| River | TRIB ILLINOIS RIVER |
| Coordinates | 40.28497, -90.06835 |
Physical Characteristics
| NID Height | 36 ft |
| Dam Height | 36 ft |
| Dam Length | 7,574 ft |
| NID Storage | 1,440 acre-ft |
| Max Storage | 1,440 acre-ft |
| Surface Area | 44 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | October 7, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | - |
| Primary Purpose | Debris Control |
| Dam Type | Earth |
| Owner Type | Public Utility |
| Owner | DYNEGY MIDWEST GENERATION, LLC |
| Other Name | Havana Station East Ash Pond System - Cell 3 |
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.