Long Lake Dam is an earth dam located in Oakland County, Michigan, built in 1965. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 25 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 Long Lake Dam
The primary purpose of Long Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Oakland County Drain Commissioner (private). It impounds the Long Lake Outlet.
The dam stands 10 feet tall and stretches 25 feet across, creates a reservoir covering 166 acres, and has a maximum storage capacity of 500 acre-feet. Completed in 1965, 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 10/25/2019.
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Location
| State | Michigan |
| County | Oakland |
| River/Stream | Long Lake Outlet |
| Coordinates | 42.61167, -83.45083 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 25 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 500 acre-ft |
| Max Storage | 500 acre-ft |
| Normal Storage | 175 acre-ft |
| Surface Area | 166 acres |
| Max Discharge | 24 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Oakland County Drain Commissioner |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/25/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI04002 |
| Federal ID | MI04002 |
| More Info | State Dam Safety Program |