AN UNINTENTIONAL ROOF FALL OCCURRED AT THE MILLENNIUM PORTAL MAIN WEST UNIT CROSSCUT BETWEEN ENTRY #3 TO #4 AT 4442'WEST. THE FALL WAS APPROXIMATELY 40'LONG, APPROXIMATELY 17'WIDE AND APPROXIM ATELY 8-10' THICK. THE FALL DID NOT AFFECT VENTILATION OR PASSAGE OF MINERS. THE FALL WILL NOT BE CLEANED UP. FALL #20J