Swint Lake Dam
Swint Lake Dam is an earth dam located in Henry County, Illinois, built in 1968. It carries a Significant hazard potential classification.
About Swint Lake Dam
The primary purpose of Swint Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Ernie Swint (private). It impounds the Trib Mineral Creek near Green River.
The dam stands 34 feet tall and stretches 450 feet across, and has a maximum storage capacity of 260 acre-feet. Completed in 1968, 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 |
| Coordinates | 41.42329, -90.24812 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 450 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 260 acre-ft |
| Max Storage | 260 acre-ft |
| Normal Storage | 187 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | ERNIE SWINT |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 05/06/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00441 |
| Federal ID | IL00441 |
| More Info | State Dam Safety Program |