Lake Summerset Dam
Illinois — Winnebago County — SOUTH BRANCH OTTER CREEK
Location
| State | Illinois |
| County | Winnebago |
| River | SOUTH BRANCH OTTER CREEK |
| Coordinates | 42.44806, -89.38435 |
Physical Characteristics
| NID Height | 44 ft |
| Dam Height | 44 ft |
| Dam Length | 1,794 ft |
| NID Storage | 7,312 acre-ft |
| Max Storage | 7,312 acre-ft |
| Surface Area | 301 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | October 13, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1969 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | LAKE SUMMERSET ASSOCIATION, INC. |
| Other Name | Lake Summerset |
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.