Main Street east of I-5 has been closed to all traffic.
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The closures occurred while the border was closed and addressed "safety and critical on-site repairs."
Until repairs can be made, the section of road, north and south of the sinkhole, is closed to all traffic.
WSDOT said traffic was being alternated through 1 open lane at the scene of the crash as of 3pm.
Traffic will be detoured via Ulrich Road, Imhof Road and Main Street.
As of 6:45am, northbound and southbound traffic was being detoured via Siper Road and Mack Road.
The cement truck had rear-ended a passenger car reportedly stopped for a school bus.
The work will take place from 7am-5pm Monday through Friday.
This will be a continuous closure impacting all traffic, including emergency vehicles and school buses.