Jurgens Brothers Lake Dam is an earth dam located in Morgan County, Illinois, built in 1968. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 380 ft long, taller than 62% 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 Jurgens Brothers Lake Dam
The primary purpose of Jurgens Brothers Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Jurgens Brothers (private). It impounds the Little Indian Creek near Arenzville.
The dam stands 28 feet tall and stretches 380 feet across, and has a maximum storage capacity of 121 acre-feet. Completed in 1968, the structure is well into its service life at over 50 years 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 08/15/2025.
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Location
| State | Illinois |
| County | Morgan |
| Nearest City | Arenzville |
| River/Stream | Little Indian Creek |
| Coordinates | 39.86294, -90.07298 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 380 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 121 acre-ft |
| Max Storage | 121 acre-ft |
| Normal Storage | 76 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Jurgens Brothers |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 08/15/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL00604 |
| Federal ID | IL00604 |
| More Info | State Dam Safety Program |