Lake Duquoin Dam
Lake Duquoin Dam is an earth dam located in Perry County, Illinois, built in 1937. It carries a Significant hazard potential classification.
About Lake Duquoin Dam
The primary purpose of Lake Duquoin Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City Of Duquoin (local government). It impounds the Reese Creek near Duquoin.
The dam stands 18 feet tall and stretches 700 feet across, and has a maximum storage capacity of 2,544 acre-feet. Completed in 1937, the structure is well-established, with more than 75 years of service.
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 07/16/2025.
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Location
| State | Illinois |
| County | Perry |
| Nearest City | Duquoin |
| River/Stream | Reese Creek |
| Coordinates | 38.06175, -89.22541 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 700 ft |
| Year Completed | 1937 (89 years old) |
Storage & Hydraulics
| NID Storage | 2,544 acre-ft |
| Max Storage | 2,544 acre-ft |
| Normal Storage | 1,387 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | CITY OF DUQUOIN |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 07/16/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00535 |
| Federal ID | IL00535 |
| More Info | State Dam Safety Program |