Antelope Mine began operations in 1985 with a current permitted mining capacity of 42 million tons per year. Current mining involves dual seams with a coal seam thickness of 32 feet to 36 feet.
We are an energy company founded on our legacy of expertise and operational excellence in coal production.
Campbell County, WY
Cordero began operations in 1976 and currently has a permitted mining capacity of 65 million tons per year in conjunction with the Caballo Rojo Loadout.
San Juan County, NM on the Navajo Nation
Navajo Mine began operations in 1963 and currently has a permitted mining capacity of 4.7 million tons per year.
Big Horn County, MT
Spring Creek Mine began operations in 1980 and currently has a permitted mining capacity of 36 million tons per year.