Smithson
Key Takeaway
Smithson is classified as high hazard in Oklahoma. It was completed in 1930 and is 96 years old. Its primary use is other. 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 | 18 ft (taller than 7.5% in OK) |
| Dam Length | 450 ft |
| Dam Type | Earth |
| Max Storage | 107 acre-ft |
| Normal Storage | 89 acre-ft |
| Surface Area | 11 acres |
| Max Discharge | 7,068 cfs |
| Year Completed | 1930 (96 years old) |
| NID ID | OK21081 |
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
MID-WESTERN AIRCRAFT SYSTEMS
Private
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What is the hazard classification of Smithson?
Smithson 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 Smithson?
Smithson is owned by MID-WESTERN AIRCRAFT SYSTEMS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Smithson built?
Smithson was completed in 1930, making it 96 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 Smithson?
Smithson 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 Smithson?
Smithson has a dam height of 18 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 Smithson last inspected?
Smithson was last inspected on November 17, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.