Westchester Lagoon Dam
Key Takeaway
Westchester Lagoon Dam is classified as significant hazard in Alaska. It was completed in 1973 and is 53 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 22 ft (taller than 38.8% in AK) |
| Dam Length | 1,830 ft |
| Dam Type | Earth |
| Max Storage | 300 acre-ft |
| Normal Storage | 200 acre-ft |
| Surface Area | 60 acres |
| Drainage Area | 28 sq mi |
| Max Discharge | 350 cfs |
| Year Completed | 1973 (53 years old) |
| NID ID | AK00029 |
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
ANCHORAGE MUNICIPALITY OF
Local Government
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High HazardFrequently Asked Questions
What is the hazard classification of Westchester Lagoon Dam?
Westchester Lagoon 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 Westchester Lagoon Dam?
Westchester Lagoon Dam is owned by ANCHORAGE MUNICIPALITY OF (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Westchester Lagoon Dam built?
Westchester Lagoon Dam was completed in 1973, making it 53 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 Westchester Lagoon Dam?
Westchester Lagoon Dam serves the following purposes: Recreation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Westchester Lagoon Dam?
Westchester Lagoon Dam has a dam height of 22 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Westchester Lagoon Dam last inspected?
Westchester Lagoon Dam was last inspected on August 6, 2018. Inspection dates indicate when a formal review occurred, not the results of that inspection.