Mauvaise Terre Lake Dam
Illinois — Morgan County — MAUVAISE TERRE CREEK
Location
| State | Illinois |
| County | Morgan |
| River | MAUVAISE TERRE CREEK |
| Coordinates | 39.71881, -90.21702 |
Physical Characteristics
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 850 ft |
| NID Storage | 5,624 acre-ft |
| Max Storage | 5,624 acre-ft |
| Surface Area | 262 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | August 15, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1923 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Local Government |
| Owner | CITY OF JACKSONVILLE |
| Other Name | Mauvaise Terre 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.