At approx. 5:35 pm, a roof fall above the anchorage was discovered in the intake entry of the 6Left off 4North section. The roof fall was in the intersection at 14+00 and continued outby for approx. 40 ft. The roof fall was approx. 40 ft. long x 17 ft. wide and 6.5 ft.high. There were no injuries or property damage. The fall was dangered off and the escapeway re-routed.