An accident at a quarry in Scott City turned deadly on Monday morning. According to Scott City Police Chief Chris Griggs, an employee at the Colt Rock & Lime quarry was killed in an accident on the property involving a piece of equipment.The employee was a Perryville man. Scott County Coroner Cody Caudle reports the 26-year-old worker was driving a piece of equipment when it turned over, causing the deadly accident.