Chase Lake Stormwater Detention Dam
Key Takeaway
Chase Lake Stormwater Detention Dam is classified as high hazard in Washington. It was completed in 1990 and is 36 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 | 200 ft |
| Dam Type | Earth |
| Max Storage | 22 acre-ft |
| Normal Storage | 14 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 19 cfs |
| Year Completed | 1990 (36 years old) |
| NID ID | WA00603 |
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
Snohomish County Public Works - Surface Water
Local Government
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Low HazardFrequently Asked Questions
What is the hazard classification of Chase Lake Stormwater Detention Dam?
Chase Lake Stormwater Detention 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 Chase Lake Stormwater Detention Dam?
Chase Lake Stormwater Detention Dam is owned by Snohomish County Public Works - Surface Water (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Chase Lake Stormwater Detention Dam built?
Chase Lake Stormwater Detention Dam was completed in 1990, making it 36 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 Chase Lake Stormwater Detention Dam?
Chase Lake Stormwater Detention 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 Chase Lake Stormwater Detention Dam last inspected?
Chase Lake Stormwater Detention Dam was last inspected on November 1, 2023. Inspection dates indicate when a formal review occurred, not the results of that inspection.