Youngs Lake Cascades Dam
Key Takeaway
Youngs Lake Cascades Dam is classified as significant hazard in Washington. It was completed in 1950 and is 76 years old. Its primary use is water supply. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| 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 | 0 cfs |
| Year Completed | 1950 (76 years old) |
| NID ID | WA00209 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Seattle Public Utilities
Local Government
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Low HazardFrequently Asked Questions
What is the hazard classification of Youngs Lake Cascades Dam?
Youngs Lake Cascades Dam is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Youngs Lake Cascades Dam?
Youngs Lake Cascades 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 Cascades Dam built?
Youngs Lake Cascades 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 Youngs Lake Cascades Dam?
Youngs Lake Cascades 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 Cascades Dam last inspected?
Youngs Lake Cascades Dam was last inspected on November 7, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.