Upper Little Black A-7 Dam
Key Takeaway
Upper Little Black A-7 Dam is classified as high hazard in Missouri. It was completed in 1984 and is 42 years old. Its primary use is flood risk reduction. 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 | 54 ft (taller than 96.1% in MO) |
| Dam Length | 1,600 ft |
| Dam Type | Earth |
| Max Storage | 5.8K acre-ft |
| Normal Storage | 486 acre-ft |
| Surface Area | 64 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 8,367 cfs |
| Year Completed | 1984 (42 years old) |
| NID ID | MO31829 |
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
UPPER LITTLE BLACK SUBD
Local Government
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Low Hazard 35 ftFrequently Asked Questions
What is the hazard classification of Upper Little Black A-7 Dam?
Upper Little Black A-7 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 Upper Little Black A-7 Dam?
Upper Little Black A-7 Dam is owned by UPPER LITTLE BLACK SUBD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Little Black A-7 Dam built?
Upper Little Black A-7 Dam was completed in 1984, making it 42 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 Upper Little Black A-7 Dam?
Upper Little Black A-7 Dam serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Upper Little Black A-7 Dam?
Upper Little Black A-7 Dam has a dam height of 54 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 Upper Little Black A-7 Dam last inspected?
Upper Little Black A-7 Dam was last inspected on March 3, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.