Gregg Dam
Key Takeaway
Gregg Dam is classified as low hazard in South Dakota. It was completed in 2009 and is 17 years old. Its primary use is fish and wildlife pond.
Physical Details
| Dam Height | 12 ft (taller than 3% in SD) |
| Dam Length | 500 ft |
| Dam Type | Earth |
| Max Storage | 155 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 1,350 cfs |
| Year Completed | 2009 (17 years old) |
| NID ID | SD02570 |
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
JEFFERY GREGG
Private
Nearby Dams
Gregg Dam No. 2
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High HazardSouth Okreek
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High HazardPaulsen
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Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Gregg Dam?
Gregg Dam 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 Gregg Dam?
Gregg Dam is owned by JEFFERY GREGG (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Gregg Dam built?
Gregg Dam was completed in 2009, making it 17 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 Gregg Dam?
Gregg Dam serves the following purposes: Fish And Wildlife Pond, Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Gregg Dam?
Gregg Dam has a dam height of 12 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.