Person #1
Key Takeaway
Person #1 is classified as significant hazard in South Dakota. It was completed in 1983 and is 43 years old. Its primary use is fire protection. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 21 ft (taller than 40.7% in SD) |
| Dam Length | 500 ft |
| Dam Type | Earth |
| Max Storage | 400 acre-ft |
| Normal Storage | 120 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 2,100 cfs |
| Year Completed | 1983 (43 years old) |
| NID ID | SD02240 |
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
GERALD A. PERSON
Private
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Low Hazard 21 ftFrequently Asked Questions
What is the hazard classification of Person #1?
Person #1 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 Person #1?
Person #1 is owned by GERALD A. PERSON (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Person #1 built?
Person #1 was completed in 1983, making it 43 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 Person #1?
Person #1 serves the following purposes: Fire Protection, Stock, Or Small Fish Pond, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Person #1?
Person #1 has a dam height of 21 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.