Willow Lake Dam
Illinois — Stephenson County — TRIB PECATONICA RIVER
Location
| State | Illinois |
| County | Stephenson |
| River | TRIB PECATONICA RIVER |
| Coordinates | 42.33181, -89.63911 |
Physical Characteristics
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 590 ft |
| NID Storage | 299 acre-ft |
| Max Storage | 299 acre-ft |
| Surface Area | 23 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | August 13, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1974 |
| Primary Purpose | Other |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | WILLOW LAKE ASSOCIATION |
| Other Name | Willow 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.