Hermine
Key Takeaway
Hermine is classified as low hazard in Wyoming. It was completed in 1912 and is 114 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 12 ft (taller than 6.2% in WY) |
| Dam Type | Earth |
| Max Storage | 174 acre-ft |
| Normal Storage | 132 acre-ft |
| Year Completed | 1912 (114 years old) |
| Year Modified | 2016 |
| NID ID | WY00242 |
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
GARRETT RANCH COMPANY
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Hermine?
Hermine 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 Hermine?
Hermine is owned by GARRETT RANCH COMPANY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Hermine built?
Hermine was completed in 1912, making it 114 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 Hermine?
Hermine 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 Hermine?
Hermine has a dam height of 12 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 Hermine last inspected?
Hermine was last inspected on August 15, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.