Klahanie Stormwater Detention Dam No 13
Key Takeaway
Klahanie Stormwater Detention Dam No 13 is classified as high hazard in Washington. It was completed in 1989 and is 37 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 | 860 ft |
| Dam Type | Earth |
| Max Storage | 56 acre-ft |
| Normal Storage | 35 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 30 cfs |
| Year Completed | 1989 (37 years old) |
| NID ID | WA00602 |
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 Klahanie Stormwater Detention Dam No 13?
Klahanie Stormwater Detention Dam No 13 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 Klahanie Stormwater Detention Dam No 13?
Klahanie Stormwater Detention Dam No 13 is owned by Sammamish City Public Works (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Klahanie Stormwater Detention Dam No 13 built?
Klahanie Stormwater Detention Dam No 13 was completed in 1989, making it 37 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 Klahanie Stormwater Detention Dam No 13?
Klahanie Stormwater Detention Dam No 13 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 Klahanie Stormwater Detention Dam No 13 last inspected?
Klahanie Stormwater Detention Dam No 13 was last inspected on September 1, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.