Holly Lake Dam
Key Takeaway
Holly Lake Dam is classified as high hazard in Missouri. It was completed in 1955 and is 71 years old. Its primary use is recreation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 40 ft (taller than 89.7% in MO) |
| Dam Length | 570 ft |
| Dam Type | Earth |
| Max Storage | 140 acre-ft |
| Normal Storage | 140 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 448 cfs |
| Year Completed | 1955 (71 years old) |
| Year Modified | 1999 |
| NID ID | MO11021 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
HOLLY LAKE ASSOCIATION
Private
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What is the hazard classification of Holly Lake Dam?
Holly Lake Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Holly Lake Dam?
Holly Lake Dam is owned by HOLLY LAKE ASSOCIATION (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Holly Lake Dam built?
Holly Lake Dam was completed in 1955, making it 71 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 Holly Lake Dam?
Holly 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 Holly Lake Dam?
Holly Lake Dam has a dam height of 40 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 Holly Lake Dam last inspected?
Holly Lake Dam was last inspected on October 14, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.