Hennepin Station East Ash Pond
Illinois — Putnam County — TRIB ILLINOIS RIVER
Location
| State | Illinois |
| County | Putnam |
| River | TRIB ILLINOIS RIVER |
| Coordinates | 41.30357, -89.30083 |
Physical Characteristics
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 3,600 ft |
| NID Storage | 300 acre-ft |
| Max Storage | 300 acre-ft |
| Surface Area | 16 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Not Available |
| EAP Status | No |
| Last Inspection | September 10, 2025 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1996 |
| Primary Purpose | Other |
| Dam Type | Earth |
| Owner Type | Public Utility |
| Owner | DYNEGY MIDWEST GENERATION, LLC |
| Other Name | Hennepin Ash Disposal Facility |
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.