AN UNINTENTIONAL ROOF FALL OCCURRED AT THE MILLENNIUM PORTAL 4 NORTH BLEEDERS, ENTRY #4 6345 N, 600 W. THE FALL WAS APPROX. 50' LONG, APPROX. 18' WIDE AND APPROX. 14-16' THICK. THE FALL DID NOT AFFECT VENTILATION OR PASSAGE OF MINERS. THE FALL WILL NOT BE CLEANED UP. FALL #21D.