EE WAS DRIVING A SHIFT CHANGE VAN FROM AREA D ATTHE END OF THE NIGHT SHIFT. HE HIT A SLICK SPOT IN THE ROAD. THE VAN SLID & AS HE TRIED TO CORRECT IT, IT SLID TO THE LEFT & WHEN IT HIT GRAVEL, IT TURNED OVER. THERE WERE (5) PEOPLE IN THE VAN, ALL WERE TRANSPORTED TO LOCAL HOSPITALS. (4)INJURIES WERE REPORTABLE: 3 FROM THE MINE AND 1 CONTRACT EE. EE HAD FRACTURED RIBS, RELEASED 1/21