Upper Little Black D-4 Dam
Key Takeaway
Upper Little Black D-4 Dam is classified as significant hazard in Missouri. It was completed in 1986 and is 40 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 40 ft (taller than 89.7% in MO) |
| Dam Length | 775 ft |
| Dam Type | Earth |
| Max Storage | 194 acre-ft |
| Normal Storage | 194 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,589 cfs |
| Year Completed | 1986 (40 years old) |
| Year Modified | 1985 |
| NID ID | MO31862 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Local Government
Nearby Dams
Upper Little Black Watershed Dam D- 3
Ripley, MO
Low Hazard 29 ftUpper Little Black D-8 Dam
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High Hazard 38 ftUpper Little Black Watershed Dam D- 7
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Low Hazard 35 ftUpper Little Black D-5 Dam
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Low Hazard 39 ftUpper Little Black Watershed Dam D- 1
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Low Hazard 33 ftUpper Little Black Watershed Dam D- 9
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Low Hazard 33 ftUpper Little Black A-2
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High Hazard 60 ftUpper Little Black Watershed Dam A-5
Butler, MO
Low Hazard 34 ftFrequently Asked Questions
What is the hazard classification of Upper Little Black D-4 Dam?
Upper Little Black D-4 Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. 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 D-4 Dam?
Upper Little Black D-4 Dam is owned by information not available (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Upper Little Black D-4 Dam built?
Upper Little Black D-4 Dam was completed in 1986, making it 40 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 D-4 Dam?
Upper Little Black D-4 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 D-4 Dam?
Upper Little Black D-4 Dam has a dam height of 40 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 D-4 Dam last inspected?
Upper Little Black D-4 Dam was last inspected on March 4, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.