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Power outage causes brief pump station overflow in South Seattle

Summary

A power outage that affected 7,000 homes and businesses in South Seattle on Saturday night led to a sewage overflow at King County's South Henderson Pump Station. King County reported the overflow to health and regulatory agencies and will monitor water quality in Lake Washington near Beer Sheva Park for the next several days.

Story

Sewer utility crews responded quickly Saturday evening to a brief overflow at King County's South Henderson Pump Station, located at 5327 S. Henderson St. in Seattle’s Rainier Beach neighborhood.

The station lost power shortly before 9 p.m. during an outage that affected approximately 7,000 homes and businesses in South Seattle. The station’s backup power system failed to engage, causing wastewater to overflow into Lake Washington for about 12 minutes.

Crews were able to manually restart the pump station and quickly stop the overflow. The station is now operating normally.

King County reported the overflow to health and regulatory agencies and will post signage warning people to avoid contact with the water in Lake Washington near Beer Sheva Park where the overflow occurred. 

Employees with King County’s Environmental Laboratory will sample and monitor water quality over the next several days. 

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