Sleepy Hollow Dam
Key Takeaway
Sleepy Hollow Dam is classified as significant hazard in Michigan. It was completed in 1974 and is 52 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 30 ft (taller than 89.2% in MI) |
| Dam Length | 1,072 ft |
| Dam Type | Earth |
| Max Storage | 7.9K acre-ft |
| Normal Storage | 3.9K acre-ft |
| Surface Area | 413 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 6,289 cfs |
| Year Completed | 1974 (52 years old) |
| NID ID | MI00717 |
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
MDNR Parks & Recreation
State Government
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Significant Hazard 21 ftFrequently Asked Questions
What is the hazard classification of Sleepy Hollow Dam?
Sleepy Hollow 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 Sleepy Hollow Dam?
Sleepy Hollow Dam is owned by MDNR Parks & Recreation (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Sleepy Hollow Dam built?
Sleepy Hollow Dam was completed in 1974, making it 52 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 Sleepy Hollow Dam?
Sleepy Hollow Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Sleepy Hollow Dam?
Sleepy Hollow Dam has a dam height of 30 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 Sleepy Hollow Dam last inspected?
Sleepy Hollow Dam was last inspected on October 28, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.