Main Lake Dam
Low HazardNot Available ConditionEmergency Action Plan: No
Location
| State | Illinois |
| County | Hamilton |
| Nearest City | EQUALITY |
| River/Stream | TRIB WHEELER CREEK |
| Coordinates | 38.07334, -88.47481 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 2,200 ft |
| Year Completed | 1976 (50 years old) |
Storage & Hydraulics
| NID Storage | 1,285 acre-ft |
| Max Storage | 1,285 acre-ft |
| Normal Storage | 694 acre-ft |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | INLAND STEEL COMPANY |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 07/29/2025 |
| Emergency Action Plan | No |