Thread Lake Dam is a gravity dam located in Genesee County, Michigan, built in 1973. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 9 ft9 ft tall and 293 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Thread Lake Dam
The primary purpose of Thread Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by City of Flint (local government). It impounds the Thread Creek near Flint.
The dam stands 9 feet tall and stretches 293 feet across, creates a reservoir covering 80 acres, has a maximum storage capacity of 1,250 acre-feet, and collects water from a drainage area of 57 square miles. Completed in 1973, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/01/2019.
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Location
| State | Michigan |
| County | Genesee |
| Nearest City | Flint |
| River/Stream | Thread Creek |
| Coordinates | 43.00333, -83.67500 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 293 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 1,250 acre-ft |
| Max Storage | 1,250 acre-ft |
| Normal Storage | 320 acre-ft |
| Surface Area | 80 acres |
| Drainage Area | 57 sq mi |
| Max Discharge | 2,256 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | City of Flint |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/01/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MI00063 |
| Federal ID | MI00063 |
| More Info | State Dam Safety Program |