Minnawanna Dam
Minnawanna Dam is an earth dam located in Lapeer County, Michigan, built in 1963. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Minnawanna Dam
The primary purpose of Minnawanna Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mdnr Parks & Recreation (state). It impounds the South Branch Farmers Creek near Hadley.
The dam stands 33 feet tall and stretches 1,245 feet across, creates a reservoir covering 60 acres, has a maximum storage capacity of 900 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1963, 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 06/04/2019.
At 33 feet, this dam is taller than 78% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Michigan |
| County | Lapeer |
| Nearest City | Hadley |
| River/Stream | South Branch Farmers Creek |
| Coordinates | 42.94569, -83.35272 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 1,245 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 900 acre-ft |
| Max Storage | 900 acre-ft |
| Normal Storage | 720 acre-ft |
| Surface Area | 60 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 285 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | MDNR Parks & Recreation |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/04/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MI00576 |
| Federal ID | MI00576 |
| More Info | State Dam Safety Program |