UPDATE at 9:15 p.m.: All lanes of Interstate 5 have reopened, the Oregon Department of Transportation said.

***

A white, chalky mess covered the northbound lanes of Interstate 5 after drywall mud spilled near Terwilliger on Thursday night.

The spill closed all northbound lanes of the highway near Terwilliger, the Oregon Department of Transportation said. The department advises drivers avoid the area.

Crews are working to clean the spill, the department said. There is no estimated time for when the highway will reopen.

— The Oregonian/OregonLive