Mackey
Key Takeaway
Mackey is classified as low hazard in Wyoming. It was completed in 2000 and is 26 years old. Its primary use is fish and wildlife pond.
Physical Details
| Dam Height | 15 ft (taller than 10.6% in WY) |
| Dam Length | 1,535 ft |
| Dam Type | Earth |
| Max Storage | 179 acre-ft |
| Normal Storage | 123 acre-ft |
| Surface Area | 19 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 59 cfs |
| Year Completed | 2000 (26 years old) |
| NID ID | WY02235 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
GREYBULL VALLEY IRRIGATION DISTRICT
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Mackey?
Mackey is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Mackey?
Mackey is owned by GREYBULL VALLEY IRRIGATION DISTRICT (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Mackey built?
Mackey was completed in 2000, making it 26 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 Mackey?
Mackey serves the following purposes: Fish And Wildlife Pond, Fire Protection, Stock, Or Small Fish Pond, Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Mackey?
Mackey has a dam height of 15 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 Mackey last inspected?
Mackey was last inspected on April 20, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.