Information from the City of SeaTac

Drivers need to be prepared for a 28-night southbound closure of International Boulevard between South 204th Street and South 208th Street. 

The nearly month-long nighttime closure could begin as early as Tuesday, July 5 and extend through August. The start date is pending approval of permits and a traffic control plan. Detours will be in place to direct drivers around the closure. The nighttime closure is expected to run from 10 p.m. to 7 a.m. The project completion date could be affected by inclement weather.

The closure will allow Puget Sound Energy to install a new gas main on a new bridge over the future State Route 509 extension. The project is part of a joint construction project for the SR 509 extension from I-5 to 24th Avenue South and the Sound Transit Light Rail Extension from Angle Lake Station to Federal Way.

The light rail project is expected to be completed by 2024.  The WSDOT SR 509 first phase of extension is expected to be completed by 2025. For all the information about the SR 509 click here.

The Sound Transit Federal Way Link Extension information is here.