A ROOF FALL OCCURRED ON 3-LEFT MMU-0005 OUTBY AT 3 ENTRY 8 TO 9 BLOCK. THE TOP WAS SHALE WITH SLIPS PRESENT. IT WAS BOLTED TO PLAN WITH 6'X3/4"" FULLY GROUNDS RESIN BOLTS USING 6""X16"" BEARING P IATES. AREA DEVELOPED APP 9-2-99. SIZE OF FALL 70'LX18'W6' TO 7' HIGH, 30' WIN INTERSECTION. ADDITIONAL ROOF SUPPORT CRIBS HAD BEEN INSTALLED PREVOUSLY FALL WILL NOT BE CLEANED UP.