Youngs Lake Outlet Dam
Key Takeaway
Youngs Lake Outlet Dam is classified as high hazard in Washington. It was completed in 1921 and is 105 years old. Its primary use is water supply. 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 | 1,450 ft |
| Dam Type | Earth |
| Max Storage | 35.5K acre-ft |
| Normal Storage | 33.8K acre-ft |
| Surface Area | 690 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 30 cfs |
| Year Completed | 1921 (105 years old) |
| NID ID | WA00254 |
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
Seattle Public Utilities
Local Government
Nearby Dams
Youngs Lake Cascades Dam
King, WA
Significant HazardYoungs Lake New Inlet Dam
King, WA
High HazardMadsen Creek West Basin Dam
King, WA
High HazardSpringwood Stormwater Detention Dam
King, WA
High HazardGarrison Creek Stormwater Detention Dam
King, WA
Significant HazardGarrison Creek 98th Avenue Detention D
King, WA
High HazardUpper Mill Creek Stormwater Detention Da
King, WA
High HazardCedar Hills Landfill Csw Pond
King, WA
Significant HazardFrequently Asked Questions
What is the hazard classification of Youngs Lake Outlet Dam?
Youngs Lake Outlet 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 Youngs Lake Outlet Dam?
Youngs Lake Outlet Dam is owned by Seattle Public Utilities (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Youngs Lake Outlet Dam built?
Youngs Lake Outlet Dam was completed in 1921, making it 105 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 Youngs Lake Outlet Dam?
Youngs Lake Outlet Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
When was Youngs Lake Outlet Dam last inspected?
Youngs Lake Outlet Dam was last inspected on November 7, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.