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Project update

October 2, 2018

King County is beginning design on a critical project to replace two buildings in the Interbay Industrial area. These buildings house employees who support construction, operations, and maintenance of King County’s regional sewer system. 

The County’s project team is taking on the challenge to design a functional, cost-efficient, and highly sustainable building that will meet the needs of our employees into the future.

We are beginning outreach to our project neighbors and groups/organizations in the area. Through one-on-one meetings, briefings, and response to questions and concerns, we will establish a dialogue that will inform construction plans.

An important goal of the County’s project outreach is to promote the value of industrial careers and businesses.  We look forward to meeting our neighbors and learning about the work they do.

To learn more, view the Fall Newsletter .

Project description

King County Wastewater Treatment Division (WTD) is replacing buildings that house the West Section Offsite Facilities and North Satellite Construction Management employees. These buildings are located in the Interbay Industrial Area near Fisherman’s Terminal.

map: location of Jameson Building and ArcWeld BuildingView higher resolution version .

These workers build and maintain sewer infrastructure that serves about a 100-mile service area. Offsite crews maintain equipment and facilities that move wastewater from the service area to our West Point Treatment Plant . WTD’s Construction Management oversees contractors building pipes, pump stations, Wet Weather facilities, and regulator stations that support people in our growing region. 

These two buildings have reached the end of their useful life and do not have room to support our workforce into the future. Limited space for work vehicles requires parking on WTD’s Ballard Siphon site nearby. King County’s team will design and build a sustainable, cost-effective facility that supports these essential employees with a functional, healthy workplace.

jameson-bldgThe Jameson building includes employee office space, a machine shop, and materials storage.

ArcWeld buildingThe ArcWeld building, a modified house, provides office space for some Construction Management employees.


King County is committed to the highest green building and sustainable development standards and strategies for King County-owned buildings and infrastructure. The Jameson Replacement Project will help meet green building goals in the County’s Strategic Climate Action Plan as one of 10 Living Building Challenge projects initiated by 2020. WTD recommends Petal Certification for this project. Watch for updates as the project team begins design in fall 2018!

Community outreach

King County WTD puts a premium on outreach to communities when we plan, design, and build projects. This project is no exception. Our employees are an important part of the project community. The new buildings need to support their work and provide a safe, healthy workplace where they can reach their potential.

The existing buildings are located in the Interbay Industrial area, where our neighbors include diverse industrial businesses. We will work closely with businesses in the area to identify ways to reduce impacts during construction and to make sure that our new facilities fit in the neighborhood and support the area’s future vision.

Project schedule

project timeline

Let us hear from you!

  • We value your input on the project design and look forward to working with the community to define design priorities later this year. There will be many ways to get involved over the life of the project.
  • You can expect one-on-one outreach to directly impacted neighbors, neighborhood meetings, community group briefings and project updates.
  • Stay up to date by joining our email list and visiting our website. If you have any questions or concerns, please contact Monica Van Der Vieren.

Design Phase

Contact us

Monica Van der Vieren, Community Services:


Project location

vicinity map for Jameson & ArcWeld BuildingsView higher resolution version .

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