Hanna
Key Takeaway
Hanna is classified as low hazard in Wyoming. It was completed in 1934 and is 92 years old. Its primary use is other.
Physical Details
| Dam Height | 25 ft (taller than 39.5% in WY) |
| Dam Length | 594 ft |
| Dam Type | Concrete |
| Max Storage | 0 acre-ft |
| Normal Storage | 62 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1934 (92 years old) |
| NID ID | WY01683 |
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
TOWN OF HANNA (RICHARD GREGORY)
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Hanna?
Hanna 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 Hanna?
Hanna is owned by TOWN OF HANNA (RICHARD GREGORY) (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hanna built?
Hanna was completed in 1934, making it 92 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 Hanna?
Hanna serves the following purposes: Other, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Hanna?
Hanna has a dam height of 25 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 Hanna last inspected?
Hanna was last inspected on June 28, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.