THE INJURED EMPLOYEE WAS CHECKING SCSR'S ON THE OLD UNIT 3 WORKED OUT, RECOVERY AREA. AS HE TURNED TO WALK AWAY FROM THE SCSR'S A PIECE OF ROOF ROCK FELL FROM BETWEEN THE ROOF BOLTS AND STRUCK HIM ON THE BACK LOWER RIGHT LEG AND ANKLE. THE EMPLOYEE STARTED MISSING TIME ON 9/16/03 AND HE IS STILL UNDER THE DOCTOR'S CARE AT THIS TIME.