Big Four Mine Dam
Key Takeaway
Big Four Mine Dam is classified as high hazard in Missouri. It was completed in 1978 and is 48 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 | 73 ft (taller than 98.7% in MO) |
| Dam Length | 1,200 ft |
| Dam Type | Other |
| Max Storage | 2.0K acre-ft |
| Normal Storage | 2.0K acre-ft |
| Surface Area | 85 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 245 cfs |
| Year Completed | 1978 (48 years old) |
| NID ID | MO30729 |
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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High Hazard 85 ftFrequently Asked Questions
What is the hazard classification of Big Four Mine Dam?
Big Four 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 Big Four Mine Dam?
Big Four Mine Dam is owned by information not available (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Big Four Mine Dam built?
Big Four Mine Dam was completed in 1978, making it 48 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 Big Four Mine Dam?
Big Four 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 Big Four Mine Dam?
Big Four Mine Dam has a dam height of 73 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 Big Four Mine Dam last inspected?
Big Four Mine Dam was last inspected on October 28, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.