Assessment of coal geology, resources, and reserves in the .
WEBTotal coal production from all five mines in the Montana Powder River Basin assessment area from 1968 to 2011 was approximately billion short tons. The Rosebud/Knobloch coal bed near Colstrip and the Anderson, Dietz 2, and Dietz 3 coal beds near Decker contain the largest deposits of surface minable, lowsulfur, subbituminous coal currently ...