Caltrans, the California Highway Patrol and other emergency personnel are responding to a tanker that overturned near Idlewild on U.S. 199 and spilled some of its contents into the Smith River early Thursday morning.

The driver, a Redding man, was hauling more than 6,000 gallons of asphalt binder in a 2016 Kenworth semi at about 3:40 a.m. when his vehicle left the lane, collided with the embankment and overturned, CHP Public Information Officer Pete Gonzalez told Redwood Voice Community News. The driver was transported to Sutter Coast Hospital with major injuries, Gonzalez said.

It’s currently unknown how much of the asphalt binder entered the Smith River, Gonzalez said.

The collision occurred about a mile south of the Idlewild Maintenance Station, Gonzalez said. The road is currently down to one-way controlled traffic, he told Redwood Voice at about 11:30 a.m.