Overnight lane closures on southbound SR 99 will continue starting Tuesday, May 27, in SeaTac and Des Moines for an ongoing sidewalk improvement project.
Right lane closures are planned on southbound SR 99 between South 200th Street in SeaTac and SR 516 in Des Moines from 10 p.m. to 5 a.m. nightly Tuesday, May 27, until 5 a.m. Friday morning, May 30.
Closures also are planned on local streets where they intersect with SR 99 during the same times.
Signed detours will guide people around these nightly closures.
Closure details
- Tuesday, May 27: South 200th Street will close at the intersection of southbound SR 99 from 10 p.m. Tuesday, May 28, until 5 a.m. Wednesday, May 29.
- Wednesday, May 28: South 216th Street will close at the intersection with southbound SR 99 from 10 p.m. Wednesday, May 28, until 5 a.m. Thursday, May 29.
- Thursday, May 29: South 220th Street will close at the intersection with southbound SR 99 from 10 p.m. Thursday, May 29, until 5 a.m. Wednesday, May 30.
This work is part of a project to upgrade sidewalk ramps to modern American with Disabilities Act standards along a 2-mile section of SR 99 between South 200th Street in SeaTac and SR 516 in Des Moines.
Starting next month, crews will begin repaving all lanes along this corridor.
Real-time travel information is available from the WSDOT mobile app, the WSDOT Travel Center Map or by signing up for WSDOT’s email updates.
