Alton Twin Lakes-South Lake Dam
Illinois — Madison County — TRIB WEST FORK WOOD RIVER
Location
| State | Illinois |
| County | Madison |
| River | TRIB WEST FORK WOOD RIVER |
| Coordinates | 38.94573, -90.12622 |
Physical Characteristics
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 300 ft |
| NID Storage | 200 acre-ft |
| Max Storage | 200 acre-ft |
| Surface Area | — |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Not Available |
| EAP Status | No |
| Last Inspection | August 20, 2025 |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | 1970 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | HAROLD KINNARD |
| Other Name | Alton Twin Lakes-South 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.