Cummings Lake Dam
Cummings Lake Dam is an earth dam located in Shiawassee County, Michigan, built in 1970. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Cummings Lake Dam
The primary purpose of Cummings Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Shiawassee County Dc (private). It impounds the Springbrook Creek near Shytown.
The dam stands 21 feet tall and stretches 620 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 230 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1970, 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 07/17/2017.
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Location
| State | Michigan |
| County | Shiawassee |
| Nearest City | Shytown |
| River/Stream | Springbrook Creek |
| Coordinates | 42.91667, -84.19000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 620 ft |
| Year Completed | 1970 (56 years old) |
Storage & Hydraulics
| NID Storage | 230 acre-ft |
| Max Storage | 230 acre-ft |
| Normal Storage | 110 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 560 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Shiawassee County DC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/17/2017 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MI00465 |
| Federal ID | MI00465 |
| More Info | State Dam Safety Program |