Klahanie Stormwater Detention Dam No 1
Key Takeaway
Klahanie Stormwater Detention Dam No 1 is classified as significant hazard in Washington. It was completed in 1984 and is 42 years old. Its primary use is flood risk reduction. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Length | 400 ft |
| Dam Type | Earth |
| Max Storage | 16 acre-ft |
| Normal Storage | 8 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 50 cfs |
| Year Completed | 1984 (42 years old) |
| NID ID | WA01484 |
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
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 1?
Klahanie Stormwater Detention Dam No 1 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 Klahanie Stormwater Detention Dam No 1?
Klahanie Stormwater Detention Dam No 1 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 1 built?
Klahanie Stormwater Detention Dam No 1 was completed in 1984, making it 42 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 1?
Klahanie Stormwater Detention Dam No 1 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 1 last inspected?
Klahanie Stormwater Detention Dam No 1 was last inspected on September 8, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.