Sound Transit has launched a public engagement period for its Operation and Maintenance Facility South (OMF South) preferred alternative at South 336th Street in Federal Way, and they’re seeking public feedback.

In 2021, the Sound Transit Board named the South 336th Street Alternative as the preferred alternative (see graphic below or learn more here):

Later this year, the Board is expected to select the project to be built after publication of the Final EIS.

If the Sound Transit Board selects the preferred alternative for the project, Sound Transit will propose closing 20th Avenue South, from South 336th Street to South 341st Place. The agency would use this area for constructing and operating the facility, where light rail vehicles will go for cleaning, storage, and maintenance.

Public benefits are required for the Federal Way City Council to consider approval of the permanent closure of a street like 20th Avenue South.

The proposed public benefits include:

  • A pedestrian and bicycle multi-use path along the west side of the 18th Place South extension
  • Creating new public space along South 336th Street


Learn about the new potential project alternatives near you, subscribe for updates and send us your questions and feedback at

In-person drop-in sessions:

Visit us in-person to learn more and get your questions answered by project team staff.

  • Saturday, March 16, 2024: Federal Way Library, 11:30 a.m. – 1:30 p.m. 34200 1st Way S, Federal Way, WA 98003
  • Tuesday, March 26, 2024: Federal Way 320th Library, 5:00 – 7:00 p.m., 848 S 320th Street, Federal Way, WA 98003

The OMF South would meet agency needs for an expanded fleet of light rail vehicles to serve South King and Pierce counties and is anticipated to bring over 600 high-quality, living-wage jobs in fields such as mechanics and administration.