Wonder Lake Sediment Dewatering Facility Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Illinois |
| County | McHenry |
| Nearest City | WONDER LAKE |
| River/Stream | GALT CREEK - OFFSTREAM |
| Coordinates | 42.39851, -88.37691 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 2,300 ft |
| Year Completed | 2014 (12 years old) |
Storage & Hydraulics
| NID Storage | 300 acre-ft |
| Max Storage | 300 acre-ft |
| Surface Area | 40 acres |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Other |
| Owner | E-I-E-I-O, LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 10/03/2025 |
| Emergency Action Plan | Yes |