ON 1/14/03, THE EMPLOYEE WAS OPERATING A MOTOR GRADER AND WHILE CLEANING UP A COAL SPILL AT THE TRUCK HOOPER, HE BACKED OVER A CHUNK OF COAL WITH THE RIGHT REAR TIRE. THIS CAUSED HIM TO BOUNCE IN THE OPERATOR'S SEAT, WHICH JAMMED HIS BACK. ON HIS FIRST VISIT TO THE DOCTOR, NO RESTRICTIONS WERE ISSUED. AN MRI WAS TAKEN (1/22/03) & HE WAS ALLOWED TO RETURN TO WORK WITH RESTRICTIONS.