Officials plan to interview the driver of the pilot car.
NEW video courtesy of Ayman Mohyeldin shows the moments leading up to the accident and the impact.
Officials are looking for a temporary, pre-fabricated bridge to replace the 160-foot section that failed. If one is found, it could be in place in weeks. If not, it could be months before a replacement can be built.
WSDOT has hired Atkinson Construction to begin removal of the fallen bridge section from the Skagit River. Saturday night, barges were to begin to float in heavy cutting and lifting equipment.
Crews must remove the fallen span from the river before final inspections of the bridge and piers can be completed. Once the inspections are complete, WSDOT engineers can begin designing a preferred option for repairing the bridge and reopening the corridor as soon as possible.
Detour information from WSDOT
The Department of Transportation will continue to modify the detour routes. Find up-to-date information at the following locations
There are several ways you can keep updated on traffic through the area:
Planes, trains are an alternative to automobiles
Drivers are facing two, even three-hour delays because of bridge detours. Some companies are offering travelers an alternative to driving.
Amtrak and BNSF are taking on more passengers. Alaska Airlines also announced a special fare of $99 each way, Seattle to Bellingham, through June 1. Some people are flying via Kenmore Air
Amtrak says it plans to add one daily round trip between Seattle and Bellingham.
In a statement, Amtrak, WSDOT, Sound Transit and BNSF Railway said they're working together to add the service. It would involve a morning departure from Seattle to Bellingham with an early evening return to help those who normally drive the route. Spokesmen said more details will be released as they become available.
Amtrak says its Amtrak Cascades service provides four trips each day over the Skagit River Rail Bridge, which remains fully functional.