AN UNINTENTIONAL ROOF FALL OCCURRED ON 6--5-00 ON THE D6 PANEL. 1 BREAK IN BY SURVEY STATION 4448 IN THE NO. 4 ENTRY 3D PANEL. THE FALL WAS APPROX 42 FT LONG BY 18 FT WIDE BY 16 FT HIGH. THE F ALL CONTAINED RESIN AND CABLE BOLTS. IT HAD BEENSUPPORTED WITH CRIBS AND CROSSBARS. FALL WAS DANGERED OFF AND WILL NOT BE CLEANED UP.