Construction alert: Federal Way Link Extension

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Construction alert

Construction impacts map for September and October State Road 99 closure, Federal Way Link Extension

Work area

Full and directional overnight closures of SR 99 in SeaTac


Sound Transit’s contractors will conduct a series of full and directional closures of SR 99 between S 204th St. and S 208th St. throughout September and October. These closures are necessary for Link light rail bridge construction and will take place overnight only.


All closures will be overnight between the hours of 10 p.m. and 5 a.m. The roadway will be fully open during the day:

  • Full closures: 9/10
  • Northbound closures: 9/6, 9/7, 9/8, 9/12, 9/20, 9/21, 9/27, 9/28
  • Southbound closures: 9/13, 9/14, 9/15, 9/19, 9/22, 9/26, 9/29, 10/3, 10/4, 10/5


SR 99 (International Blvd) between S 204th St. and S 208th St. (see map)


  • All work will take place 10 p.m. – 5 a.m.
  • Crews will try to reduce noise when possible.
  • Detours will be in place.
  • Cranes, trucks, and other heavy equipment will be used.

*Work is weather dependent and subject to change.

Contact us

Community Engagement: or (206) 398-LINK (5465)
After-hours construction hotline: 888-298-2395

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Stay safe

24-hour construction hotline: 888-298-2395

More project info:
Get in touch: or (206) 398-LINK (5465)