June 20, 2013 in City

Temporary span opens on Interstate 5

Bridge collapsed almost a month ago
 

MOUNT VERNON, Wash. – Cars and trucks are rolling again across the Interstate 5 Skagit River bridge, restoring the traffic flow on the main route between Seattle and Vancouver, B.C.

A temporary span opened Wednesday morning, replacing a section of the bridge that collapsed May 23 when it was struck by a truck with an oversize load.

Workers with the state Department of Transportation and contractors rushed work on the temporary span to relieve drivers who lined up to detour through Mount Vernon and Burlington. The bridge carries 71,000 vehicles a day.

Those vehicles are back on the freeway, but they’ll be slowed at the bridge where the speed is reduced to 40 mph because of narrow lanes on the 160-foot temporary section. It carries two 11-foot lanes in each direction. Oversized and overweight loads will still be detoured.

The temporary bridge pieces were supplied by Acrow Bridge through an emergency contract the Department of Transportation signed with Atkinson Construction. The Max Kuney construction company of Spokane was selected Tuesday for a permanent replacement this fall.

The temporary span and replacement cost nearly $18 million. The federal Transportation Department is paying for all but about $1 million of the work.

Despite all the work, the 58-year-old bridge is still rated as “functionally obsolete” because it was not designed to handle today’s traffic volume and big trucks. It’s also “fracture critical,” meaning that if a single, vital component is compromised, the bridge can crumple again.

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