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Project update

Spring 2021

The Jameson Building Replacement Project Team is currently in the Final Design phase. Environmental review, permitting, and ongoing outreach occur during this phase. The team is also working on alternate locations for our essential Offsite Operations and Construction Management employees during construction.

King County Wastewater Treatment Division (WTD) operations staff and contractors remain on the job to ensure the region’s wastewater treatment service continues. Our maintenance work and construction projects are critical to our mission – treating wastewater to protect public health.

You can learn more about the Jameson Building Replacement Project.

Watch this YouTube video and meet some of our employees:

View a Story Map and learn more about WTD, our Jameson employees, and how we’re designing a building that meets their needs.

Designing for the future - photo of Jameson Building and link to storymap.

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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