Mirror Lake Dam
Mirror Lake Dam is an earth dam located in Jackson County, Michigan, built in 1966. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Mirror Lake Dam
The primary purpose of Mirror Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Jackson County Drain Commissioner (private). It impounds the Grand River near Liberty.
The dam stands 21 feet tall and stretches 865 feet across, creates a reservoir covering 61 acres, has a maximum storage capacity of 745 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1966, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/30/2020.
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Location
| State | Michigan |
| County | Jackson |
| Nearest City | Liberty |
| River/Stream | Grand River |
| Coordinates | 42.08079, -84.42219 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 865 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 745 acre-ft |
| Max Storage | 745 acre-ft |
| Normal Storage | 510 acre-ft |
| Surface Area | 61 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Jackson County Drain Commissioner |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/30/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MI00654 |
| Federal ID | MI00654 |
| More Info | State Dam Safety Program |