Simpson Lake Dam
Illinois — Johnson County — TRIB BAY CREEK
Location
| State | Illinois |
| County | Johnson |
| River | TRIB BAY CREEK |
| Coordinates | 37.46757, -88.71736 |
Physical Characteristics
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 690 ft |
| NID Storage | 222 acre-ft |
| Max Storage | 222 acre-ft |
| Surface Area | — |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Not Available |
| EAP Status | No |
| Last Inspection | June 27, 2024 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1963 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | LEVI SIMPSON |
| Other Name | Simpson 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.