Boulder Lake
Key Takeaway
Boulder Lake is classified as significant hazard in Wyoming. It was completed in 1964 and is 62 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 25 ft (taller than 39.5% in WY) |
| Dam Length | 380 ft |
| Dam Type | Earth |
| Max Storage | 37.8K acre-ft |
| Normal Storage | 22.3K acre-ft |
| Surface Area | 1,676 acres |
| Drainage Area | 126 sq mi |
| Max Discharge | 6,190 cfs |
| Year Completed | 1964 (62 years old) |
| NID ID | WY01195 |
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
BOULDER IRRIGATION DISTRICT
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Boulder Lake?
Boulder Lake 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 Boulder Lake?
Boulder Lake is owned by BOULDER IRRIGATION DISTRICT (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Boulder Lake built?
Boulder Lake was completed in 1964, making it 62 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 Boulder Lake?
Boulder Lake 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 Boulder Lake?
Boulder Lake 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 Boulder Lake last inspected?
Boulder Lake was last inspected on August 10, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.