Pinnacle Lake Dam
Key Takeaway
Pinnacle Lake Dam is classified as high hazard in Missouri. It was completed in 1965 and is 61 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 | 49 ft (taller than 94.7% in MO) |
| Dam Length | 800 ft |
| Dam Type | Earth |
| Max Storage | 2.6K acre-ft |
| Normal Storage | 2.5K acre-ft |
| Surface Area | 118 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 22,069 cfs |
| Year Completed | 1965 (61 years old) |
| Year Modified | 1990 |
| NID ID | MO30923 |
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
PINNACLE LAKE EST. ASSOC
Private
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High Hazard 46 ftFrequently Asked Questions
What is the hazard classification of Pinnacle Lake Dam?
Pinnacle 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 Pinnacle Lake Dam?
Pinnacle Lake Dam is owned by PINNACLE LAKE EST. ASSOC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pinnacle Lake Dam built?
Pinnacle Lake Dam was completed in 1965, making it 61 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 Pinnacle Lake Dam?
Pinnacle 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 Pinnacle Lake Dam?
Pinnacle Lake Dam has a dam height of 49 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 Pinnacle Lake Dam last inspected?
Pinnacle Lake Dam was last inspected on August 19, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.