Freeman United/ /fresh Water Lake Dam is an earth dam located in Williamson County, Illinois, built in 1964. It carries a Significant hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 690 ft long, taller than 68% 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 Freeman United/ /fresh Water Lake Dam
Freeman United/ /fresh Water Lake Dam is a dam in Williamson, Illinois. The dam is owned by Springfield Coal Company (private). It impounds the Trib Lake Creek near Johnston City.
The dam stands 30 feet tall and stretches 690 feet across, and has a maximum storage capacity of 642 acre-feet. Completed in 1964, 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 10/18/2023.
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Location
| State | Illinois |
| County | Williamson |
| Nearest City | Johnston City |
| River/Stream | Trib Lake Creek |
| Coordinates | 37.80413, -88.87552 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 690 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 642 acre-ft |
| Max Storage | 642 acre-ft |
| Normal Storage | 333 acre-ft |
| Spillway Type | None |
Ownership & Safety
| Purpose | Other |
| Owner | Springfield Coal Company |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 10/18/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00016 |
| Federal ID | IL00016 |
| More Info | State Dam Safety Program |