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

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

Beginning at 5 a.m. Monday, May 13, 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 will remain in place around-the-clock while crews repair and repave the bridge deck. When the work is complete this summer, the highway will return to its regular two-lane westbound configuration.

The speed limit is also reduced to 50 mph during this work, and oversized vehicles are prohibited from traveling in the westbound direction across the bridge.

Work plan & maps

Contractor crews will work in one lane at a time. They will first grind off the old concrete in the right lane, make any needed repairs to the bridge deck and repave it. When that is complete, they’ll shift traffic onto the new pavement and repeat the process in the left lane.

 Right lane closure map
This configuration will be 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
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 (pdf 161 kb)

 Left lane closure map
This configuration will be in place beginning at 5 a.m. Wednesday, June 12.

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

 Overnight full closures
The project will require up to eight overnight full closures of westbound SR 18 so crews can safely set temporary barriers and pour new concrete. 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.
 
Upcoming full westbound SR 18 closure dates/times:

  • 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)

The remaining overnight closure dates will be announced as the project moves forward. For up-to-date information, follow our King County construction webpage.