May Lake Dam
Key Takeaway
May Lake Dam is classified as high hazard in Washington. It was completed in 1950 and is 76 years old. Its primary use is irrigation. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Length | 250 ft |
| Dam Type | Earth |
| Max Storage | 49 acre-ft |
| Normal Storage | 13 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 10 cfs |
| Year Completed | 1950 (76 years old) |
| NID ID | WA01533 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
McMillan, Brian
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of May Lake Dam?
May Lake Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates May Lake Dam?
May Lake Dam is owned by McMillan, Brian (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was May Lake Dam built?
May Lake Dam was completed in 1950, making it 76 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 May Lake Dam?
May Lake Dam serves the following purposes: Irrigation, Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was May Lake Dam last inspected?
May Lake Dam was last inspected on October 28, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.