Glen O. Jones Lake Dam is an earth dam located in Saline County, Illinois, built in 1963. It carries a Significant hazard potential classification.
Dam profile
NID height · 42 ft42 ft tall and 1,275 ft long, taller than 88% of U.S. dams with a recorded height. 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 Glen O. Jones Lake Dam
The primary purpose of Glen O. Jones Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Illinois Department of Natural Resources (state). It impounds the Horseshoe Creek near Equality.
The dam stands 42 feet tall and stretches 1,275 feet across, creates a reservoir covering 105 acres, has a maximum storage capacity of 2,551 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1963, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 11/06/2024.
At 42 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Illinois |
| County | Saline |
| Nearest City | Equality |
| River/Stream | Horseshoe Creek |
| Coordinates | 37.69006, -88.38207 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 42 ft |
| Dam Length | 1,275 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 2,551 acre-ft |
| Max Storage | 2,551 acre-ft |
| Normal Storage | 1,433 acre-ft |
| Surface Area | 105 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 4,766 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Illinois Department of Natural Resources |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 11/06/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL00025 |
| Federal ID | IL00025 |
| More Info | State Dam Safety Program |