Arnault Branch Mine Dam
Key Takeaway
Arnault Branch Mine Dam is classified as high hazard in Missouri. It was completed in 1970 and is 56 years old. Its primary use is tailings. 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 | 46 ft (taller than 93.2% in MO) |
| Dam Length | 750 ft |
| Dam Type | Other |
| Max Storage | 582 acre-ft |
| Normal Storage | 530 acre-ft |
| Surface Area | 41 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 2,375 cfs |
| Year Completed | 1970 (56 years old) |
| NID ID | MO30716 |
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
Private
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Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Arnault Branch Mine Dam?
Arnault Branch Mine 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 Arnault Branch Mine Dam?
Arnault Branch Mine Dam is owned by information not available (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Arnault Branch Mine Dam built?
Arnault Branch Mine Dam was completed in 1970, making it 56 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 Arnault Branch Mine Dam?
Arnault Branch Mine Dam serves the following purposes: Tailings. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Arnault Branch Mine Dam?
Arnault Branch Mine Dam has a dam height of 46 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 Arnault Branch Mine Dam last inspected?
Arnault Branch Mine Dam was last inspected on December 1, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.