SR 18 - EB Soosette Creek to Holder Creek - Paving & Deck Overlay - Closure details & maps

 Overnight full closures

The project will require several overnight full closures of westbound SR 18 so crews can safely set temporary barriers, pour new concrete and restripe. During these closures, travelers will use the Issaquah-Hobart Road off- and on-ramps to bypass the work zone, with a uniformed police officer directing traffic at the intersection.

Detour map for westbound SR 18 overnight closure at Issaquah-Hobart Road.

Completed westbound SR 18 closures:

  • 9 p.m. to 5 a.m. nightly, Monday, Aug. 26 - Thursday, Aug. 29 (Completed)
  • 9 p.m. Tuesday, Aug. 6, to 5 a.m. Wednesday, Aug. 7 (Completed)
  • 9 p.m. Monday, Aug. 5, to 5 a.m. Tuesday, Aug. 6 (Completed)
  • 9 p.m. to 5 a.m. nightly, Monday, July 29 - Thursday, Aug. 1 (Completed)
  • 11 p.m. Friday, July 5, to 6 a.m. Saturday, July 6 (Completed)
  • 10 p.m. Monday, June 17, to 5 a.m. Tuesday, June 18 (Completed)
  • 10 p.m. Tuesday, June 11, to 5 a.m. Wednesday, June 12 (Completed)
  • 10 p.m. Sunday, May 12, to 5 a.m. Monday, May 13 (Completed)

For up-to-date information, follow our King County construction webpage.

Around-the-clock work on westbound SR 18 at Issaquah-Hobart Road

From Monday, May 13, through Tuesday, July 30, contractor crews extended the one-lane section of westbound SR 18 by about a half-mile, across the Issaquah-Hobart Road overpass. This temporary configuration remained in place around-the-clock while crews repaired and repaved the bridge deck. The speed limit was also reduced to 50 mph during this work, and oversized vehicles were prohibited from traveling in the westbound direction across the bridge.

Work plan & maps

Contractor crews worked in one lane at a time. They first grinded off the old concrete in the right lane, make any needed repairs to the bridge deck and repaved it. When that was complete, they shifted traffic onto the new pavement and repeated the process in the left lane.

 Right lane closure map
This configuration was in place from 5 a.m. Monday, May 13, to 10 p.m. Tuesday, June 11.

WB SR 18 - Issaquah Hobart Road overpass - Right lane closure map
View larger map
 (pdf 161 kb)

 Left lane closure map
This configuration was in place from 5 a.m. Wednesday, June 12, to 5 a.m. Tuesday, July 30.

WB SR 18 - Issaquah Hobart Road overpass - Left lane closure map
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 (pdf 158 kb)