On March 24, 2007, on the west mains section, the continuous miner,while cutting sandstone and shale top, generated frictional heat allowing a piece of cap coal to start burning in the no. 9 entry. It was extinguished in less than five minutes. The miner cutting coal was an Eimco 2810-0. There was no pop, no charring, no visible signs of ignition, only fire.