Driver alert: SR 99 closed southbound Oct. 12-15

Posted on Oct 10 2018 3:26 PM

10/12 UPDATE: During this weekend’s closure contractor crews will place barrier and barrels on southbound SR 99 just south of the S. Atlantic St exit. This will create a safe work space on the right shoulder (west side) of the highway so crews can pour asphalt and concrete to fix a dip in the highway, and keep it protected while the concrete cures. Later this fall they will move the work zone to the left shoulder (east side) in order to repair the other half of the southbound roadway. These work zones will keep southbound SR 99 to two lanes until approximately S. Holgate Street, where the third lane will open. The southbound dip repair should be complete this fall, weather permitting.

This weekend Seattle drivers should plan their routes ahead of time as the two main highways through Seattle will have opposite-direction closures. SR 99 will be closed southbound between the south end of the Battery Street Tunnel and South Spokane Street, while I-5 will have northbound lane reductions as part of the Revive I-5 project.

Closing southbound SR 99 will allow contractor crews to take advantage of good weather to pour concrete near the South Atlantic Street off-ramp. This area, today occupied by the SR 99 detour through the tunnel work zone, will become the merge of southbound SR 99 and the new southbound on-ramp. This work is part of the SR 99 Connections Project, which is completing the eight ramps that will connect SR 99 and the new tunnel to local streets.

SR 99 closure details:

  • SR 99 southbound closed from south end of Battery Street Tunnel to South Spokane Street
  • Closure begins 9 p.m. Friday, Oct. 12
  • Closure ends 5 a.m. Monday, Oct. 15


I-5 lane reduction details:

  • Northbound I-5 will be reduced to two lanes between Martin Luther King Jr. Way and Olive Way
  • Lane reductions begin at 8 p.m. Friday, Oct. 12
  • Lane reductions end 5 a.m. Monday, Oct. 15.
  • More details about Revive I-5

Don't forget: Alaskan Way along the waterfront will be closed Saturday night as crews switch travel lanes west.

Order: 7.3