Hahn Lake Dam is an earth dam located in Richland County, Illinois, built in 1947. It carries a Low hazard potential classification.
Dam profile
NID height · 32 ft32 ft tall and 500 ft long, taller than 74% 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 Hahn Lake Dam
The primary purpose of Hahn Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Eugene Hahn (private). It impounds the Big Creek-offstream near Blood.
The dam stands 32 feet tall and stretches 500 feet across, and has a maximum storage capacity of 195 acre-feet. Completed in 1947, the structure is well-established, with more than 75 years of service.
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 06/20/2025.
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Location
| State | Illinois |
| County | Richland |
| Nearest City | Blood |
| River/Stream | Big Creek-offstream |
| Coordinates | 38.69304, -88.05959 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 500 ft |
| Year Completed | 1947 (79 years old) |
Storage & Hydraulics
| NID Storage | 195 acre-ft |
| Max Storage | 195 acre-ft |
| Normal Storage | 129 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Eugene Hahn |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/20/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00330 |
| Federal ID | IL00330 |
| More Info | State Dam Safety Program |