Hurley
Key Takeaway
Hurley is classified as significant hazard in South Dakota. It was completed in 1933 and is 93 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 46 ft (taller than 98.2% in SD) |
| Dam Length | 675 ft |
| Dam Type | Earth |
| Max Storage | 4.1K acre-ft |
| Normal Storage | 2.1K acre-ft |
| Surface Area | 55 acres |
| Drainage Area | 74 sq mi |
| Max Discharge | 6,500 cfs |
| Year Completed | 1933 (93 years old) |
| NID ID | SD00037 |
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
GF&P
State Government
Nearby Dams
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Low Hazard 24 ftR. Heath
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Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Hurley?
Hurley 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 Hurley?
Hurley is owned by GF&P (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hurley built?
Hurley was completed in 1933, making it 93 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 Hurley?
Hurley serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Hurley?
Hurley has a dam height of 46 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 Hurley last inspected?
Hurley was last inspected on July 28, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.