Willow Lake
Key Takeaway
Willow Lake is classified as significant hazard in Wyoming. It was completed in 1955 and is 71 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 20 ft (taller than 21.5% in WY) |
| Dam Length | 320 ft |
| Dam Type | Earth |
| Max Storage | 32.1K acre-ft |
| Normal Storage | 22.6K acre-ft |
| Surface Area | 1,958 acres |
| Drainage Area | 32 sq mi |
| Max Discharge | 625 cfs |
| Year Completed | 1955 (71 years old) |
| NID ID | WY01192 |
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
WILSON, BINNING, BAYER, JORGENSEN, ETAL
Private
Nearby Dams
Blatt Lake
Sublette, WY
Low Hazard 14 ftSoda Lake Wetlands
Sublette, WY
Low Hazard 12 ftKitchen
Sublette, WY
Low Hazard 17 ftSunset
Sublette, WY
Low Hazard 20 ftNew Fork Lake
Sublette, WY
High Hazard 37 ftFremont Lake
Sublette, WY
Low Hazard 10 ftBasin Reservoir
Sublette, WY
Low Hazard 28 ftNinth Parallel
Sublette, WY
Low Hazard 25 ftFrequently Asked Questions
What is the hazard classification of Willow Lake?
Willow Lake 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 Willow Lake?
Willow Lake is owned by WILSON, BINNING, BAYER, JORGENSEN, ETAL (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Willow Lake built?
Willow Lake was completed in 1955, making it 71 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 Lake?
Willow Lake serves the following purposes: Irrigation, Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Willow Lake?
Willow Lake has a dam height of 20 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 Lake last inspected?
Willow Lake was last inspected on July 23, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.