EE WAS SERVICING A HAULAGE TRUCK PARKED IN THE PIT. THE GROUND WAS SNOW AND ICE COVERED. WHILE WALKING AROUND THE TRUCK, EE SLIPPED AND FELL TO THE GROUND LANDING ON HIS KNEE AND SIDE. EE DID NOT SEEK MEDICAL HELP AND WORKED UNTIL 1-10-01 WHEN HE WAS DIAGNOSED WITH AN INJURY. STARTED MISSING WORK THEN.