Lost Valley Lake Dam
Key Takeaway
Lost Valley Lake Dam is classified as high hazard in Missouri. It was completed in 1971 and is 55 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 | 38 ft (taller than 88.1% in MO) |
| Dam Length | 600 ft |
| Dam Type | Earth |
| Max Storage | 381 acre-ft |
| Normal Storage | 240 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,293 cfs |
| Year Completed | 1971 (55 years old) |
| Year Modified | 1988 |
| NID ID | MO31079 |
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
LOST VALLEY LAKE OWN ASC
Private
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High Hazard 24 ftFrequently Asked Questions
What is the hazard classification of Lost Valley Lake Dam?
Lost Valley 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 Lost Valley Lake Dam?
Lost Valley Lake Dam is owned by LOST VALLEY LAKE OWN ASC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lost Valley Lake Dam built?
Lost Valley Lake Dam was completed in 1971, making it 55 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 Lost Valley Lake Dam?
Lost Valley 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 Lost Valley Lake Dam?
Lost Valley Lake Dam has a dam height of 38 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 Lost Valley Lake Dam last inspected?
Lost Valley Lake Dam was last inspected on January 14, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.