Edwards Lake Dam
Edwards Lake Dam is an earth dam located in Henry County, Illinois, built in 1974. It carries a Significant hazard potential classification.
About Edwards Lake Dam
The primary purpose of Edwards Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Edwards Ready Mix Company (private). It impounds the Trib Mineral Creek,green Creek near Green River.
The dam stands 34 feet tall and stretches 225 feet across, and has a maximum storage capacity of 85 acre-feet. Completed in 1974, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 05/06/2025.
At 34 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Illinois |
| County | Henry |
| Nearest City | Green River |
| River/Stream | Trib Mineral Creek,green Creek |
| Coordinates | 41.44102, -90.26547 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 225 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 85 acre-ft |
| Max Storage | 85 acre-ft |
| Normal Storage | 61 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | EDWARDS READY MIX COMPANY |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 05/06/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL01144 |
| Federal ID | IL01144 |
| More Info | State Dam Safety Program |