A truck crash and diesel spill could slow traffic on Highway 299 west of Redding for several days.

The crash happened along Grass Valley Creek near Buckhorn Summit around 4 a.m. Thursday.

A big rig loaded with asphalt crashed, careening 150 feet off the road into a ravine.  At least 100 gallons of diesel have spilled into the creek.

As of 8 a.m. the road was open, but lanes could be closing within a few hours.  That closure could last for several days.

Fish and wildlife has been notified.