A Major Scott County Virginia Roadway Is Back Open Following A Hazardous Materials Spill Earlier This Week. A Tractor Trailer Carrying Ammonium Nitrate Commonly Used As A Fertilizer Overturned On U.S. Route 23 In Gate City Monday Evening. Fire Crews Were On The Scene As A Precaution. The Clean Up Took Several Hours. The Tractor Trailer Detached Itself From The Cab And Landed In Oncoming Traffic. The Driver Of The Vehicle’s Been Charged With Wreckless Driving.