Happy Holler Dam
Key Takeaway
Happy Holler Dam is classified as high hazard in Missouri. It was completed in 1995 and is 31 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 | 43 ft (taller than 91.5% in MO) |
| Dam Length | 843 ft |
| Dam Type | Earth |
| Max Storage | 805 acre-ft |
| Normal Storage | 805 acre-ft |
| Surface Area | 62 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 9,118 cfs |
| Year Completed | 1995 (31 years old) |
| Year Modified | 1997 |
| NID ID | MO12380 |
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
MO DEPT OF CONSERVATION
State Government
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Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Happy Holler Dam?
Happy Holler 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 Happy Holler Dam?
Happy Holler Dam is owned by MO DEPT OF CONSERVATION (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Happy Holler Dam built?
Happy Holler Dam was completed in 1995, making it 31 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 Happy Holler Dam?
Happy Holler Dam serves the following purposes: Recreation, Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Happy Holler Dam?
Happy Holler Dam has a dam height of 43 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 Happy Holler Dam last inspected?
Happy Holler Dam was last inspected on March 22, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.