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WOODLAND — Mounds of dirt, a few trees and several boulders — one as big as a car — slid onto Interstate 5 just north of Woodland on Wednesday, shutting down the northbound lanes of the busy freeway until Thursday morning at the earliest.

The slide occurred shortly after 3 p.m. Wednesday a couple of hundred yards north of the onramp from Dike Access Road. No injuries were reported.

Washington State Department of Transportation spokeswoman Tamara Greenwell said crews from the department were clearing a ditch in the area to fight flooding when they heard rumbling.

“They got out of the way, and shortly after, the slide occurred,” she said.

WSDOT officials closed all northbound lanes of the freeway and said they had to wait until Thursday morning to assess whether it was safe to remove the debris and allow traffic through.