A ROOF FALL OCCURRED ON THE #1 UNIT IN THE LAST SET OF INTAKE ROOMS ON THE RETREAT IN THE LAST OPEN X-CUT IN #4 ROOM INTERSECTION WHICH WE WEREMINING IN THE 4TH NORTH PANEL OF THE 3RD EAST. FALL WAS 27' LONG, 20' WIDE & 30"" HIGH. 30"" FULLY GROUTED ROOF BOLTS WERE USED IN THIS AREA.