Willow Park
Key Takeaway
Willow Park is classified as high hazard in Wyoming. It was completed in 1959 and is 67 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 | 56 ft (taller than 95.3% in WY) |
| Dam Length | 860 ft |
| Dam Type | Earth |
| Max Storage | 6.5K acre-ft |
| Normal Storage | 4.5K acre-ft |
| Surface Area | 213 acres |
| Drainage Area | 34 sq mi |
| Max Discharge | 1,960 cfs |
| Year Completed | 1959 (67 years old) |
| Year Modified | 1978 |
| NID ID | WY00464 |
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
WILLOW PARK RES. CO.(BILL DOOLEY-SEC.)
Private
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High Hazard 50 ftFrequently Asked Questions
What is the hazard classification of Willow Park?
Willow Park 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 Willow Park?
Willow Park is owned by WILLOW PARK RES. CO.(BILL DOOLEY-SEC.) (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Willow Park built?
Willow Park was completed in 1959, making it 67 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 Willow Park?
Willow Park serves the following purposes: Irrigation, Fire Protection, Stock, Or Small Fish Pond, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Willow Park?
Willow Park has a dam height of 56 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 Willow Park last inspected?
Willow Park was last inspected on August 2, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.