Wonder Lake Sediment Dewatering Facility Dam
Illinois — McHenry County — GALT CREEK - OFFSTREAM
Location
| State | Illinois |
| County | McHenry |
| River | GALT CREEK - OFFSTREAM |
| Coordinates | 42.39851, -88.37691 |
Physical Characteristics
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 2,300 ft |
| NID Storage | 300 acre-ft |
| Max Storage | 300 acre-ft |
| Surface Area | 40 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | October 3, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 2014 |
| Primary Purpose | Other |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | E-I-E-I-O, LLC |
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.