Yellow Lake Outlet Dike
Key Takeaway
Yellow Lake Outlet Dike is classified as high hazard in Washington. It was completed in 1986 and is 40 years old. Its primary use is flood risk reduction. 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 | 260 ft |
| Dam Type | Earth |
| Max Storage | 312 acre-ft |
| Normal Storage | 1 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 5 sq mi |
| Max Discharge | 85 cfs |
| Year Completed | 1986 (40 years old) |
| NID ID | WA00559 |
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
Sammamish City Public Works
Local Government
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High HazardFrequently Asked Questions
What is the hazard classification of Yellow Lake Outlet Dike?
Yellow Lake Outlet Dike 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 Yellow Lake Outlet Dike?
Yellow Lake Outlet Dike is owned by Sammamish City Public Works (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Yellow Lake Outlet Dike built?
Yellow Lake Outlet Dike was completed in 1986, making it 40 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 Yellow Lake Outlet Dike?
Yellow Lake Outlet Dike serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Yellow Lake Outlet Dike last inspected?
Yellow Lake Outlet Dike was last inspected on September 1, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.