Coffeen Lake Dam
Illinois — Montgomery County — MC DAVID BRANCH, SHOAL CREEK
Location
| State | Illinois |
| County | Montgomery |
| River | MC DAVID BRANCH, SHOAL CREEK |
| Coordinates | 39.03516, -89.38671 |
Physical Characteristics
| NID Height | 70 ft |
| Dam Height | 70 ft |
| Dam Length | 1,300 ft |
| NID Storage | 35,800 acre-ft |
| Max Storage | 35,800 acre-ft |
| Surface Area | 1,096 acres |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | September 17, 2025 |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | 1964 |
| Primary Purpose | Other |
| Dam Type | Earth |
| Owner Type | Public Utility |
| Owner | DYNEGY MIDWEST GENERATION, INC. |
| Other Name | Coffeen Lake |
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.