Tyann
Key Takeaway
Tyann is classified as significant hazard in Oklahoma. It was completed in 1950 and is 76 years old. Its primary use is other. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 27 ft (taller than 43% in OK) |
| Dam Length | 450 ft |
| Dam Type | Earth |
| Max Storage | 114 acre-ft |
| Normal Storage | 68 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 330 sq mi |
| Max Discharge | 1,780 cfs |
| Year Completed | 1950 (76 years old) |
| NID ID | OK12634 |
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
TYANN DEVELOPMENT CO
Private
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What is the hazard classification of Tyann?
Tyann 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 Tyann?
Tyann is owned by TYANN DEVELOPMENT CO (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Tyann built?
Tyann was completed in 1950, making it 76 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 Tyann?
Tyann serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Tyann?
Tyann has a dam height of 27 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 Tyann last inspected?
Tyann was last inspected on December 1, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.