Mcginnis Lake Dam is an earth dam located in Oakland County, Michigan, built in 1978. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 19 ft19 ft tall and 400 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 Mcginnis Lake Dam
The primary purpose of Mcginnis Lake 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 Tributary to Thread Creek near Grand Blanc.
The dam stands 19 feet tall and stretches 400 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 125 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1978, the structure is 48 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 10/16/2020.
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Location
| State | Michigan |
| County | Oakland |
| Nearest City | Grand Blanc |
| River/Stream | Tributary to Thread Creek |
| Coordinates | 42.82111, -83.52750 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 400 ft |
| Year Completed | 1978 (48 years old) |
Storage & Hydraulics
| NID Storage | 125 acre-ft |
| Max Storage | 125 acre-ft |
| Normal Storage | 16 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Mdnr Parks & Recreation |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 10/16/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI01681 |
| Federal ID | MI01681 |
| More Info | State Dam Safety Program |