Mcmann Lake Dam is an earth dam located in Menard County, Illinois, built in 1970. It carries a Low hazard potential classification.
Dam profile
NID height · 19 ft19 ft tall and 465 ft long. 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 Mcmann Lake Dam
The primary purpose of Mcmann Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Gene Mcmann (private). It impounds the Trib Pike Creek near Lincoln.
The dam stands 19 feet tall and stretches 465 feet across, and has a maximum storage capacity of 103 acre-feet. Completed in 1970, 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 09/21/2023.
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Location
| State | Illinois |
| County | Menard |
| Nearest City | Lincoln |
| River/Stream | Trib Pike Creek |
| Coordinates | 40.06541, -89.60791 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 465 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 103 acre-ft |
| Max Storage | 103 acre-ft |
| Normal Storage | 52 acre-ft |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Gene Mcmann |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 09/21/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | IL01064 |
| Federal ID | IL01064 |
| More Info | State Dam Safety Program |