Duncan
Key Takeaway
Duncan is classified as significant hazard in Oklahoma. It was completed in 1937 and is 89 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 45 ft (taller than 90.3% in OK) |
| Dam Length | 2,650 ft |
| Dam Type | Earth |
| Max Storage | 12.1K acre-ft |
| Normal Storage | 7.2K acre-ft |
| Surface Area | 500 acres |
| Max Discharge | 15,000 cfs |
| Year Completed | 1937 (89 years old) |
| NID ID | OK10023 |
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
CITY OF DUNCAN
Local Government
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Low Hazard 32 ftFrequently Asked Questions
What is the hazard classification of Duncan?
Duncan 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 Duncan?
Duncan is owned by CITY OF DUNCAN (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Duncan built?
Duncan 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 Duncan?
Duncan serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Duncan?
Duncan has a dam height of 45 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 Duncan last inspected?
Duncan was last inspected on November 30, 2017. Inspection dates indicate when a formal review occurred, not the results of that inspection.