Gammon
Key Takeaway
Gammon is classified as low hazard in Wyoming. It was completed in 1974 and is 52 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 24 ft (taller than 35.6% in WY) |
| Dam Length | 1,120 ft |
| Dam Type | Earth |
| Max Storage | 86 acre-ft |
| Normal Storage | 46 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 271 cfs |
| Year Completed | 1974 (52 years old) |
| NID ID | WY01647 |
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
T-A RANCH, LLP
Private
Nearby Dams
Kelly
Johnson, WY
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High Hazard 57 ftFrequently Asked Questions
What is the hazard classification of Gammon?
Gammon 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 Gammon?
Gammon is owned by T-A RANCH, LLP (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Gammon built?
Gammon was completed in 1974, making it 52 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 Gammon?
Gammon serves the following purposes: Irrigation, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Gammon?
Gammon has a dam height of 24 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 Gammon last inspected?
Gammon was last inspected on June 21, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.