FILE - In this April 4, 2013 file photo, a truck carrying 250 tons of coal hauls the fuel to the surface of the Cloud Peak Energy's Spring Creek mine near Decker, Mont.
FILE - In this April 4, 2013 file photo, a truck carrying 250 tons of coal hauls the fuel to the surface of the Cloud Peak Energy's Spring Creek mine near Decker, Mont. AP
FILE - In this April 4, 2013 file photo, a truck carrying 250 tons of coal hauls the fuel to the surface of the Cloud Peak Energy's Spring Creek mine near Decker, Mont. AP