Upper Little Black D-2
Key Takeaway
Upper Little Black D-2 is classified as high hazard in Missouri. It was completed in 1989 and is 37 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 | 73 ft (taller than 98.7% in MO) |
| Dam Length | 1,045 ft |
| Dam Type | Earth |
| Max Storage | 4.7K acre-ft |
| Normal Storage | 607 acre-ft |
| Surface Area | 47 acres |
| Drainage Area | 11 sq mi |
| Max Discharge | 11,019 cfs |
| Year Completed | 1989 (37 years old) |
| Year Modified | 1987 |
| NID ID | MO31899 |
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
Local Government
Nearby Dams
Upper Little Black Watershed Dam D- 1
Ripley, MO
Low Hazard 33 ftUpper Little Black Watershed Dam D- 3
Ripley, MO
Low Hazard 29 ftUpper Little Black D-4 Dam
Ripley, MO
Significant Hazard 40 ftUpper Little Black D-8 Dam
Ripley, MO
High Hazard 38 ftUpper Little Black A-2
Ripley, MO
High Hazard 60 ftUpper Little Black Watershed Dam D- 7
Ripley, MO
Low Hazard 35 ftMallard Lake
Ripley, MO
Low Hazard 15 ftUpper Little Black D-5 Dam
Ripley, MO
Low Hazard 39 ftFrequently Asked Questions
What is the hazard classification of Upper Little Black D-2?
Upper Little Black D-2 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 D-2?
Upper Little Black D-2 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-2 built?
Upper Little Black D-2 was completed in 1989, making it 37 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-2?
Upper Little Black D-2 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-2?
Upper Little Black D-2 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 Upper Little Black D-2 last inspected?
Upper Little Black D-2 was last inspected on December 3, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.