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Bellevue and Mercer Island public meetings feature route for sewer pipeline upgrade


King County’s Wastewater Treatment Division will host two public meetings in January to share information about the route for an upgraded sewer pipeline.


The public is invited to join King County’s North Mercer Island/Enatai Sewer Project team to learn about the route for a new sewer pipeline at one of two meetings, scheduled for Jan. 25 and 26.

This pipeline is needed to update aging sewer infrastructure that has served Bellevue and Mercer Island since the 1970s. It will also protect public health and the environment, and ensure that the community continues to benefit from reliable wastewater service for the next 50 years.

At the meetings, King County’s project team will discuss the pipeline route and how community input influenced the route, potential construction methods, schedule, and opportunities for input during project design. 

Wednesday, Jan. 25
6-8 p.m.
Mercer Slough Environmental Education Center
1625 118th Ave. S.E., Bellevue

Thursday, Jan. 26
6-8 p.m.
Mercer Island Community Center
8236 S.E. 24th St., Mercer Island

People unable to attend these meetings can participate in an online open house from Jan. 25-Feb. 22, at

King County has been working with the community and cities to provide updates, answer questions, and hear input.  This route was identified with input from the community and cities, and extensive analysis of routes and conditions in the project area.

Construction is expected to begin in 2020, with completion scheduled in 2023.

Additional information about the project is available online at For more information, contact Monica Van der Vieren, King County Wastewater Treatment Division, 206-477-5502;