Hannah
Key Takeaway
Hannah is classified as low hazard in Wyoming. It was completed in 2007 and is 19 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 30 ft (taller than 63.1% in WY) |
| Dam Length | 850 ft |
| Dam Type | Earth |
| Max Storage | 142 acre-ft |
| Normal Storage | 96 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 488 cfs |
| Year Completed | 2007 (19 years old) |
| NID ID | WY02467 |
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
WPX ENERGY ROCKY MOUNTAIN, LLC
Private
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Low Hazard 49 ftFrequently Asked Questions
What is the hazard classification of Hannah?
Hannah 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 Hannah?
Hannah is owned by WPX ENERGY ROCKY MOUNTAIN, LLC (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hannah built?
Hannah was completed in 2007, making it 19 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 Hannah?
Hannah 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 Hannah?
Hannah has a dam height of 30 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 Hannah last inspected?
Hannah was last inspected on August 10, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.