Wellington Nap D-21a
Key Takeaway
Wellington Nap D-21a is classified as high hazard in Missouri. It was completed in 1973 and is 53 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 | 55 ft (taller than 96.3% in MO) |
| Dam Length | 335 ft |
| Dam Type | Earth |
| Max Storage | 82 acre-ft |
| Normal Storage | 54 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 897 cfs |
| Year Completed | 1973 (53 years old) |
| NID ID | MO12000 |
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
LAFAYETTE SOIL & WATER
Local Government
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What is the hazard classification of Wellington Nap D-21a?
Wellington Nap D-21a 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 Wellington Nap D-21a?
Wellington Nap D-21a is owned by LAFAYETTE SOIL & WATER (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Wellington Nap D-21a built?
Wellington Nap D-21a was completed in 1973, making it 53 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 Wellington Nap D-21a?
Wellington Nap D-21a 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 Wellington Nap D-21a?
Wellington Nap D-21a has a dam height of 55 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 Wellington Nap D-21a last inspected?
Wellington Nap D-21a was last inspected on November 3, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.