Madsen Creek West Basin Dam
Key Takeaway
Madsen Creek West Basin Dam is classified as high hazard in Washington. It was completed in 2008 and is 18 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 | 800 ft |
| Dam Type | Earth |
| Max Storage | 27 acre-ft |
| Normal Storage | 16 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 50 cfs |
| Year Completed | 2008 (18 years old) |
| Year Modified | 2009 |
| NID ID | WA01862 |
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
King County Natural Resources and Parks
Local Government
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Significant HazardFrequently Asked Questions
What is the hazard classification of Madsen Creek West Basin Dam?
Madsen Creek West Basin 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 Madsen Creek West Basin Dam?
Madsen Creek West Basin Dam is owned by King County Natural Resources and Parks (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Madsen Creek West Basin Dam built?
Madsen Creek West Basin Dam was completed in 2008, making it 18 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 Madsen Creek West Basin Dam?
Madsen Creek West Basin Dam 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 Madsen Creek West Basin Dam last inspected?
Madsen Creek West Basin Dam was last inspected on July 17, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.