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Natural Resources and Parks
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Strong weekend rains leads to manhole overflow in Bothell


Crews with King County’s clean-water utility responded quickly Sunday morning to a wastewater overflow from a manhole on the North Creek Interceptor in Bothell, a major regional sewer line in service since 1970.


Heavy rain on Saturday led to high water volumes in the pipeline, which carries wastewater from homes and businesses in the Bothell area to the Brightwater Plant for treatment. The overflow occurred at about 10 a.m. Sunday morning into a wetland west of the Bothell-Everett Highway, between 208th Street Southeast and Southeast 214th Street Southeast.
King County reported the overflow to health and regulatory agencies, and employees with the County’s environmental laboratory will sample and monitor water quality in the wetland as well as nearby North Creek over the next few days.

Construction is underway on a project to upgrade the pipeline and add additional capacity to support the growing community.

King County’s North Creek Interceptor Project entails construction of approximately 10,000 feet of new sewer line. King County’s project team is currently working closely with project neighbors to keep people informed about construction-related activities and schedules.

Detailed information about the project is available online at


Note to editors and reporters: Visit the WTD website, a portal to information for the news media about the Wastewater Treatment Division, King County Department of Natural Resources and Parks: