Kinmundy Lake Dam is an earth dam located in Marion County, Illinois, built in 1885. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 1,050 ft long, taller than 50% 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 Kinmundy Lake Dam
The primary purpose of Kinmundy 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 Kinmundy (local government). It impounds the Trib East Fork Kaskaskia River near Carlyle.
The dam stands 25 feet tall and stretches 1,050 feet across, and has a maximum storage capacity of 121 acre-feet. Completed in 1885, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 10/07/2025.
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Location
| State | Illinois |
| County | Marion |
| Nearest City | Carlyle |
| River/Stream | Trib East Fork Kaskaskia River |
| Coordinates | 38.76549, -88.86571 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 1,050 ft |
| Year Completed | 1885 (141 years old) |
Storage & Hydraulics
| NID Storage | 121 acre-ft |
| Max Storage | 121 acre-ft |
| Normal Storage | 87 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Kinmundy |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/07/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00248 |
| Federal ID | IL00248 |
| More Info | State Dam Safety Program |