West Frankfort Old City Lake Dam is an earth dam located in Franklin County, Illinois, built in 1945. It carries a Significant hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall and 850 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About West Frankfort Old City Lake Dam
The primary purpose of West Frankfort Old City Lake 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 West Frankfort (local government). It impounds the Tilley Creek near West Frankfort.
The dam stands 24 feet tall and stretches 850 feet across, creates a reservoir covering 197 acres, has a maximum storage capacity of 2,300 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1945, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 10/19/2017.
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Location
| State | Illinois |
| County | Franklin |
| Nearest City | West Frankfort |
| River/Stream | Tilley Creek |
| Coordinates | 37.89304, -88.81491 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 850 ft |
| Year Completed | 1945 (81 years old) |
Storage & Hydraulics
| NID Storage | 2,300 acre-ft |
| Max Storage | 2,300 acre-ft |
| Normal Storage | 1,420 acre-ft |
| Surface Area | 197 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,620 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of West Frankfort |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 10/19/2017 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL00009 |
| Federal ID | IL00009 |
| More Info | State Dam Safety Program |