Operations and Maintenance Facility South

Maintaining the growing light rail fleet.
Project map for Operations and Maintenance Facility South project


We need a new Operations and Maintenance Facility in the South Sound to receive, store and service a larger train fleet to support future light rail extensions to Tacoma, West Seattle and throughout the region.

An OMF is where Link trains go 24 hours a day, 365 days a year for cleaning and care. To build this new facility, we need approximately 60-70 acres (for reference, one football field is 1.3 acres) near an operating light rail line.

As part of system expansion plans, we need a total of four OMFs across the region. In addition to this future facility in South King County, we currently service the existing light rail fleet at a central OMF on South Forest Street in Seattle. We've built a second facility in Bellevue and will also add another OMF north of Seattle. 

Benefits of the OMF South

  • Creates high-skilled, living-wage jobs for more than 470 people in South King County. At our existing OMF Central in Seattle, the average employee wage is more than $40 per hour, or $80,000/year.
  • Ensures thousands of passengers ride clean, well-maintained trains. We suspend service every night between 1-5 a.m. so we can properly service our Link trains.

Current project status

We published the OMF South Draft Environmental Statement on March 5, 2021. A Draft EIS analyzes and documents possible sites and their potential impacts to the natural and built environment, and it proposes ways to mitigate unavoidable impacts. We held a public comment period on the OMF South Draft EIS between March 5 and April 19. Thank you to everyone who submitted a comment on the findings of the Draft EIS.

Have any additional questions or comments? We're always here to help. You can contact the project team at omfsouth@soundtransit.org.

We encourage you to sign up for project email updates for all the latest news as OMF South develops.

What can I expect as a project neighbor?

  • If you're a resident or a business or property owner near a potential OMF South site, signing up for email updates is the first step to ensuring you're always up to speed on the project. If you have any questions or you'd like to set up a meeting to learn more, contact the project team at omfsouth@soundtransit.org.
  • The Draft Environmental Impact Statement evaluates possible property impacts in detail. We hosted a formal comment period on the Draft EIS from March 5 to April 19, 2021. The Sound Transit Board carefully considers the feedback we receive through this formal comment process, and we'll respond to all substantive comments. 
  • After the Draft EIS public review and comment period, the Sound Transit Board will identify a site as a "preferred alternative" for the Final EIS, in late 2021. A preferred alternative is a statement of where the agency is leaning based on information available at the time. It's not a final decision.
  • The Sound Transit Board will make a final decision on the site and the project to be built after we issue the Final EIS in 2022.