After a critical steel support was struck by an oversized semi truck, a portion of the 640-foot-long, I-5 Skagit River Bridge collapsed into the Skagit River. An emergency repair was necessary due to the more than 71,000 vehicles that used the bridge daily. This emergency project was separated into three phases: installation of a temporary span (Phase 1), installation of a permanent span (Phase 2), and upgrades to the steel superstructure of the three spans that were unaffected by the accident (Phase 3).
PCL was responsible for Phase 3, which involved the removal, fabrication, installation, and painting of the portal and sway frame assemblies in the steel truss spans of the bridge that remained after the accident. The existing sway frames were replaced with horizontal members to increase the vertical clearance to 18 feet. PCL also replaced select rivets in the chords and floor beams that support the bridge deck.