The Washington Department of Transportation compiled this time lapse video from web cam images set up at the site of the temporary Interstate 5 bridge over the Skagit River.
The temporary bridge will reopen Wednesday, June 19, restoring Interstate 5 traffic less than a month after the old bridge collapsed.
Traffic has been detoured through Mount Vernon and Burlington since May 23, when a truck's load struck the north end of the bridge, causing one section to crumble and dumping a car and pickup into the river. Three people were rescued.
The temporary span will carry 99 percent of I-5 traffic, said Transportation Secretary Lynn Peterson. Oversized and overweight loads will still be detoured.
At 24-feet wide, the 160-foot temporary section is narrower than the old bridge and traffic will have to slow to 40 mph.
The bridge carried 71,000 vehicles a day on a stretch of the interstate that connects trade and tourism between Seattle and Vancouver, British Columbia.
The temporary span and a permanent replacement due this fall will cost nearly $18 million. The federal Transportation Department is paying for all but about $1 million of the work.