EMPLOYEE WAS WORKING INSIDE RAW MILL AT CEMENT PLANT AND USING A PNEUMATIC JACKHAMMER AND CHISEL TO KNOCK THE OLD LIFTER LOOSE INSIDE THE MILL. WHILE BEATING ON THE LIFTER A PIECE OF METAL CHI PPED OFF, STRIKING THE EMPLOYEE IN THE FOREHEAD BETWEEN HIS SAFETY GLASSES AND HARD HAT (ABOVE HIS LEFT EYE). EMPLOYEE SAW DOCTOR ON 12/23/02 AT WHICH TIME A 1/4"" PIECE OF EMBEDDED METAL WAS