Pierpont
Key Takeaway
Pierpont is classified as low hazard in South Dakota. It was completed in 1937 and is 89 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 24 ft (taller than 53.3% in SD) |
| Dam Length | 560 ft |
| Dam Type | Earth |
| Max Storage | 1.2K acre-ft |
| Normal Storage | 600 acre-ft |
| Surface Area | 71 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 3,300 cfs |
| Year Completed | 1937 (89 years old) |
| NID ID | SD00012 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
S&PL
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Pierpont?
Pierpont is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Pierpont?
Pierpont is owned by S&PL (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Pierpont built?
Pierpont was completed in 1937, making it 89 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 Pierpont?
Pierpont serves the following purposes: Flood Risk Reduction, Fire Protection, Stock, Or Small Fish Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Pierpont?
Pierpont has a dam height of 24 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 Pierpont last inspected?
Pierpont was last inspected on November 22, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.