Winn Lake Dam
Winn Lake Dam is an earth dam located in Lapeer County, Michigan, built in 1971. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Winn Lake Dam
The primary purpose of Winn Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by George Methven (private). It impounds the South Branch Flint River near Lapeer.
The dam stands 14 feet tall and stretches 450 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 250 acre-feet, and collects water from a drainage area of 59 square miles. Completed in 1971, 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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 12/17/2019.
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Location
| State | Michigan |
| County | Lapeer |
| Nearest City | Lapeer |
| River/Stream | South Branch Flint River |
| Coordinates | 43.03665, -83.27804 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 450 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 250 acre-ft |
| Max Storage | 250 acre-ft |
| Normal Storage | 120 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 59 sq mi |
| Max Discharge | 5,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | George Methven |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/17/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00449 |
| Federal ID | MI00449 |
| More Info | State Dam Safety Program |