Twentymile is a longwall operation. Remotely controlled, the shearer removes 40 inches of coal from the face during each mining pass. Longwall panels at Twentymile are 1,000-feet wide and extend up to three miles long. A 50-foot section of the panel is removed each day.

Twentymile’s innovative conveyor belt technology is known industrywide. Twentymile was the first to develop a scissorveyor that allows flexibility of the belt structure and eliminates production delays for structure removal as the longwall retreats. Twentymile maintains more than eight miles of underground belt line. A 72-inch wide panel belt and high-speed 60-inch mainline belt have the capacity to move more than 12 million tons of coal a year to the surface.