Hefner
Key Takeaway
Hefner is classified as high hazard in Oklahoma. It was completed in 1943 and is 83 years old. Its primary use is water supply. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 112 ft (taller than 99.7% in OK) |
| Dam Length | 26,400 ft |
| Dam Type | Earth |
| Max Storage | 107.4K acre-ft |
| Normal Storage | 74.4K acre-ft |
| Surface Area | 3,110 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 6,023 cfs |
| Year Completed | 1943 (83 years old) |
| NID ID | OK02535 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
OKLAHOMA CITY WATER UTILITIES TRUST
Local Government
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What is the hazard classification of Hefner?
Hefner is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Hefner?
Hefner is owned by OKLAHOMA CITY WATER UTILITIES TRUST (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hefner built?
Hefner was completed in 1943, making it 83 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 Hefner?
Hefner 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 Hefner?
Hefner has a dam height of 112 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 Hefner last inspected?
Hefner was last inspected on October 5, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.