MARYSVILLE, Wash. — A large pothole had multiple lanes blocked Sunday morning along northbound I-5.
Traffic was diverted near SR 529 in Marysville.
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Use of alternate routes was advised.
Officials with WSDOT said to expect "BIG delays."
By 10:39 a.m., traffic was backed up by four miles.
Lanes had reopened, after the pothole was filled, by 1 p.m.