A roof fall took place on the west escape roadway going into 1 Yard North, apprximately 1,000 feet east and 200 feet north of the Service Shaft. The roadway was partically covered. The fall was approximately 50 feet long, 30 feet wide, and three feet thick. No one was in the area when the fall occured. The area has been bolted and meshed and is now safe for travel.