William Symington Dam
Key Takeaway
William Symington Dam is classified as high hazard in Washington. It was completed in 1965 and is 61 years old. Its primary use is recreation. 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 | 315 ft |
| Dam Type | Earth |
| Max Storage | 1.2K acre-ft |
| Normal Storage | 670 acre-ft |
| Surface Area | 78 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 2,400 cfs |
| Year Completed | 1965 (61 years old) |
| NID ID | WA00190 |
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
Lake Symington Community Club
Private
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High HazardFrequently Asked Questions
What is the hazard classification of William Symington Dam?
William Symington 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 William Symington Dam?
William Symington Dam is owned by Lake Symington Community Club (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was William Symington Dam built?
William Symington Dam was completed in 1965, making it 61 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 William Symington Dam?
William Symington 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 William Symington Dam last inspected?
William Symington Dam was last inspected on September 19, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.