General Motors Dam
General Motors Dam is an arch dam located in Livingston County, Michigan, built in 1926. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About General Motors Dam
The primary purpose of General Motors Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by General Motors Corporation (private). It impounds the Mann Creek near Brighton.
The dam stands 13 feet tall and stretches 380 feet across, creates a reservoir covering 69 acres, has a maximum storage capacity of 420 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1926, the structure is well-established, with more than 75 years of service.
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 10/08/2019.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Michigan |
| County | Livingston |
| Nearest City | Brighton |
| River/Stream | Mann Creek |
| Coordinates | 42.57767, -83.68514 |
Physical Characteristics
| Dam Type | Arch |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 380 ft |
| Year Completed | 1926 (100 years old) |
Storage & Hydraulics
| NID Storage | 420 acre-ft |
| Max Storage | 420 acre-ft |
| Normal Storage | 360 acre-ft |
| Surface Area | 69 acres |
| Drainage Area | 12 sq mi |
| Max Discharge | 1,400 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | General Motors Corporation |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/08/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00599 |
| Federal ID | MI00599 |
| More Info | State Dam Safety Program |