Posy No. 1
Key Takeaway
Posy No. 1 is classified as low hazard in Wyoming. It was completed in 1995 and is 31 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 51 ft (taller than 94.3% in WY) |
| Dam Length | 1,788 ft |
| Dam Type | Earth |
| Max Storage | 2.2K acre-ft |
| Normal Storage | 1.5K acre-ft |
| Surface Area | 125 acres |
| Drainage Area | 16 sq mi |
| Max Discharge | 6,650 cfs |
| Year Completed | 1995 (31 years old) |
| NID ID | WY02048 |
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
TTT RANCH CO
Private
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Low Hazard 22 ftFrequently Asked Questions
What is the hazard classification of Posy No. 1?
Posy No. 1 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 Posy No. 1?
Posy No. 1 is owned by TTT RANCH CO (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Posy No. 1 built?
Posy No. 1 was completed in 1995, making it 31 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 Posy No. 1?
Posy No. 1 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 Posy No. 1?
Posy No. 1 has a dam height of 51 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 Posy No. 1 last inspected?
Posy No. 1 was last inspected on July 21, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.