Lyon Lake Dam
Key Takeaway
Lyon Lake Dam is classified as low hazard in Washington. It was completed in 1971 and is 55 years old. Its primary use is recreation.
Physical Details
| Dam Length | 530 ft |
| Dam Type | Earth |
| Max Storage | 68 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1971 (55 years old) |
| NID ID | WA00043 |
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
WA DFW
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lyon Lake Dam?
Lyon Lake Dam 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 Lyon Lake Dam?
Lyon Lake Dam is owned by WA DFW (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lyon Lake Dam built?
Lyon Lake Dam was completed in 1971, making it 55 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 Lyon Lake Dam?
Lyon Lake Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Lyon Lake Dam last inspected?
Lyon Lake Dam was last inspected on October 25, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.