A massive mudslide closed the highway south of the Canada-US border in Bellingham, Wash., for nearly 10 hours on Sunday.

The Washington State Department of Transportation announced the closure of I-5 near the Iowa Street exit at 5:45 a.m., saying emergency crews were called to the scene and all northbound lanes were blocked and southbound traffic was also affected.

The highway reopened just before 3 p.m

Earlier in the day, officials said the walls and barriers were damaged and a geotechnical assessment was needed.

WSDOT shared photos of the damage on social media, showing a semi truck stuck in the mud.

“It will take some time to clean everything up and make the necessary repairs. We have a lot of heavy machinery and personnel on site working to clear the debris,” an update from the agency said around 10:30 a.m.

“Crews estimate approximately 2,000 cubic yards of debris spilled onto the I-5 lanes.”

A detour was in place, but WSDOT reported that traffic was backed up for three miles, or about five kilometers. Motorists were advised to use alternative routes or expect significant delays.