A roof fall was discovered on the #4 entry (track) on the North Mains. The fall measured 40' long, 19' wide, and 4.5' thick and occurred due to laminated coal and shale streaks above the 48"" full grouted roof bolts. Ventilation and the travel of men were not affected, no injuries or equipment damage occurred as a result of the fall. Fall was 3500' from the working section.