Lower Long Lake Dam
Lower Long Lake Dam is an earth dam located in Lapeer County, Michigan, built in 1965. It carries a Low hazard potential classification and has a fair condition assessment.
About Lower Long Lake Dam
The primary purpose of Lower 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 Mdnr Wildlife (state). It impounds the Abbott Drain near Millville.
The dam stands 11 feet tall and stretches 320 feet across, creates a reservoir covering 285 acres, has a maximum storage capacity of 1,455 acre-feet, and collects water from a drainage area of 4 square miles. 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 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 05/18/2020.
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Location
| State | Michigan |
| County | Lapeer |
| Nearest City | Millville |
| River/Stream | Abbott Drain |
| Coordinates | 43.09996, -83.23540 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 320 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 1,455 acre-ft |
| Max Storage | 1,455 acre-ft |
| Normal Storage | 600 acre-ft |
| Surface Area | 285 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 100 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | MDNR Wildlife |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 05/18/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MI00582 |
| Federal ID | MI00582 |
| More Info | State Dam Safety Program |