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Heavy rains lead to manhole overflow in Bothell


A series of strong storms that brought heavy rainfall and flooding to the region led to a manhole overflow on a King County wastewater pipeline in Bothell last night. The overflow was reported to health and regulatory agencies, and King County will monitor water quality in nearby North Creek over the next several days.


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

Strong storms that brought heavy overnight rain and flooding caused 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 near the intersection of 208th St. S.E. and 14th Drive S.E. in Bothell.

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 new capacity to support the growing community. The project will be completed next fall.

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