An unitentional roof fall occurred on the 4 E belt line at station 20+75 entry #5. The fall did not affect ventilation of passage of men or cause personal injury. The fall did fall on 25 feet of belt line and structure. The fall measured 30 feet x 18 feet x 6 feet high. The area had been bolted with 6 foot fully grouted roof bolts. The area had been cribbed on one side.