Lake Hattie
Key Takeaway
Lake Hattie is classified as significant hazard in Wyoming. It was completed in 1912 and is 114 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 43 ft (taller than 90.4% in WY) |
| Dam Length | 1,480 ft |
| Dam Type | Earth |
| Max Storage | 130.2K acre-ft |
| Normal Storage | 65.3K acre-ft |
| Surface Area | 3,032 acres |
| Drainage Area | 32 sq mi |
| Max Discharge | 17,750 cfs |
| Year Completed | 1912 (114 years old) |
| Year Modified | 1990 |
| NID ID | WY00015 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
PIONEER-LAKE HATTIE IRRIGATION DISTRICT
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lake Hattie?
Lake Hattie is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lake Hattie?
Lake Hattie is owned by PIONEER-LAKE HATTIE IRRIGATION DISTRICT (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lake Hattie built?
Lake Hattie 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 Lake Hattie?
Lake Hattie 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 Lake Hattie?
Lake Hattie has a dam height of 43 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 Lake Hattie last inspected?
Lake Hattie was last inspected on June 1, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.