Grandy
Key Takeaway
Grandy is classified as significant hazard in Wyoming. It was completed in 1957 and is 69 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 15 ft (taller than 10.6% in WY) |
| Dam Length | 480 ft |
| Dam Type | Earth |
| Max Storage | 126 acre-ft |
| Normal Storage | 65 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 135 cfs |
| Year Completed | 1957 (69 years old) |
| NID ID | WY01049 |
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
MIKE HOUCK, TODD DEWITT
Private
Frequently Asked Questions
What is the hazard classification of Grandy?
Grandy 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 Grandy?
Grandy is owned by MIKE HOUCK, TODD DEWITT (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Grandy built?
Grandy was completed in 1957, making it 69 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 Grandy?
Grandy 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 Grandy?
Grandy 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 Grandy last inspected?
Grandy was last inspected on May 17, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.