Sixty Seven
Key Takeaway
Sixty Seven is classified as high hazard in Wyoming. It was completed in 1942 and is 84 years old. Its primary use is irrigation. 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 | 32 ft (taller than 73% in WY) |
| Dam Length | 956 ft |
| Dam Type | Earth |
| Max Storage | 7.1K acre-ft |
| Normal Storage | 6.1K acre-ft |
| Surface Area | 371 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 400 cfs |
| Year Completed | 1942 (84 years old) |
| NID ID | WY01275 |
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
JAY AND REBECCA DOWNS
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Sixty Seven?
Sixty Seven 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 Sixty Seven?
Sixty Seven is owned by JAY AND REBECCA DOWNS (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Sixty Seven built?
Sixty Seven was completed in 1942, making it 84 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 Sixty Seven?
Sixty Seven serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Sixty Seven?
Sixty Seven has a dam height of 32 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 Sixty Seven last inspected?
Sixty Seven was last inspected on August 12, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.