Our Mines

Coal-Supply Regions

Arch Coal is the most diversified U.S. coal producer, and the No. 2 reserve holder in the nation. Our operations extend to every major U.S. coal supply basin. We serve a broad mix of power producers and industrial accounts here and around the world with a vast metallurgical and thermal coal product slate and a wide range of logistical options for delivery.

Powder River Basin
Arch is the second largest overall producer and is the top producer of 8,800-Btu coal in the Southern PRB - the nation's largest coal-supply region. Operating two large surface mines, Black Thunder and Coal Creek, the company ships coal to power producers across the U.S., as well as overseas. Arch controls nearly 3.1 billion tons of reserves in the PRB located in Wyoming and Montana.

Western Bituminous Region
Arch operates one large underground longwall mine in Colorado, shipping coal directly to domestic and international power producers and industrial customers. The company has a total of 286 million tons of proven and probable reserves in the region.

Arch is one of the largest producers in Appalachia and a top-five U.S. producer of metallurgical coal. Arch has a 972 million reserve base in Appalachia which includes our metallurgical coal reserves. These reserves are comprised of low volatile coal, high volatile A and B coals as well as pulverized injection coal. This gives Arch one of the most extensive and highest quality metallurgical coal reserve bases in the U.S. coal industry.

Illinois Basin
Along with the company's 49% equity interest in Knight Hawk Coal, Arch operates the highly competitive, low-cost Viper mine in the Illinois Basin. Arch's extensive and competitive reserve base of 711 million tons provides a solid platform in a growth region that is well positioned to export to the Atlantic Basin market via the Gulf of Mexico.