Cummings Lake Dam
Key Takeaway
Cummings Lake Dam is classified as significant hazard in Michigan. It was completed in 1970 and is 56 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 21 ft (taller than 74.1% in MI) |
| Dam Length | 620 ft |
| Dam Type | Earth |
| Max Storage | 230 acre-ft |
| Normal Storage | 110 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 560 cfs |
| Year Completed | 1970 (56 years old) |
| NID ID | MI00465 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Shiawassee County DC
Private
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Low Hazard 8 ftFrequently Asked Questions
What is the hazard classification of Cummings Lake Dam?
Cummings Lake Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Cummings Lake Dam?
Cummings Lake Dam is owned by Shiawassee County DC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Cummings Lake Dam built?
Cummings Lake Dam was completed in 1970, making it 56 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Cummings Lake Dam?
Cummings Lake Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Cummings Lake Dam?
Cummings Lake Dam has a dam height of 21 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Cummings Lake Dam last inspected?
Cummings Lake Dam was last inspected on July 17, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.