• Project

I-5 - SB Stillaguamish River Bridge - Painting

Project overview

The Stillaguamish River Bridge was in need of new paint to preserve and protect its aging structure. Existing paint on the southbound I-5 bridge was weathered and damaged, allowing corrosion to occur. This bridge preservation project removed old peeling paint, cleaned exposed metal and applied new paint to the existing bridge structure on southbound I-5 under a full containment system. Minor maintenance and repairs were also performed such as replacing joints and rivets.

December 2020 - Summer 2022
Project status
$2.6 Million

What to expect

While the painting of the bridge was finalized in 2021, contractor crews working on behalf of the Washington State Department of Transportation are working on completing the remaining items of this project that require warm, dry weather during the summer of 2022. Shoulder and single lane closures should be expected through the end of June.

The southbound bridge was closed and under full containment for the duration of this project. All southbound traffic was diverted onto the existing median bypass on the adjacent northbound bridge beginning in June through mid-October 2021. 

This reduced northbound and southbound traffic from three lanes down to two lanes in each direction. Travelers experienced increased congestion and back-ups during peak commute hours. Speed limits were reduced from 70 mph to 50 mph through the work zone.

Originally built in 1933, the southbound I-5 Stillaguamish River bridge is weathered and damaged, allowing corrosion to occur.