A rock fell from the mine roof approx 35' inby survey station No 13356 as the 6-left crosscut was being mined on the 020-0 MMU, East section. The rock measured approx 4'6"" to 5' high x 15'6"" long x 5'6"" wide. 6' roof bolts were being used as primary roof support in the No 6 entry. This report is being submitted to prevent any additional citations.