SR 18 - Weyerhauser Way to SR 164 - Barrier Replacement

Project news

  • This project has been awarded to Massana Construction.
  • People who use eastbound and westbound SR 18 between Weyerhaeuser Way and SR 164 should plan for left lane closures between 11 p.m. Fridays and 6 p.m. Saturdays.
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In 2021, WSDOT will spend $2 million to replace aging concrete barriers separating eastbound and westbound travelers on State Route 18 between Weyerhauser Way South and SR 164 in Auburn.

Needs & Benefits

More than 100,000 drivers use this section of State Route 18 every day. The barrier currently separating the eastbound and westbound lanes has outlived its useful life. Many barrier bases and connective parts are broken or rusted. Broken pieces could present a hazard in the event of a major collision. The new barriers meet current crash testing criteria.


  • Spring 2021: Advertise for competitive bidding.
  • July 2021: Median barrier installation begins.
  • Fall 2021: Median barrier installation complete.


Financial Data for PIN 101801C
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $3,372
CWA $0
Total $3,372


Tom Pearce
WSDOT Communications
Phone: 206-440-4696 

Thumbnail map of project area