Wellington, Utah (Oct. 7, 2011) – Arch Coal's Canyon Fuel Company subsidiary today announced that its Dugout Canyon mine in Carbon County, Utah, has achieved 1 million man-hours and two full years without a Mine Safety and Health Administration (MSHA) reportable lost-time incident.

In addition, Dugout Canyon's Castle Valley Preparation Plant has a perfect 2011 record and has operated incident-free for five consecutive years.

"We applaud Dugout Canyon's achievements and ongoing efforts toward working safely each and every day," said Paul A. Lang, Arch Coal executive vice president of operations. "Dugout's achievements demonstrate our employees' deep-rooted commitment to safety, which is prevalent across our operations nationwide."

In 2010, Dugout Canyon miners worked 486,453 hours with a lost-time incident rate of zero compared to the national underground average of 3.72 incidents per 200,000 employee-hours.

Arch's Canyon Fuel Company is Utah's largest coal producer and a large state employer, with a workforce of 900. It operates the Dugout Canyon, Skyline and Sufco mines.

U.S.-based Arch Coal, Inc. (NYSE:ACI) is a top five global coal producer and marketer, with 179 million tons of coal sold pro forma in 2010. Arch is the most diversified American coal company, with mining complexes across every major U.S. coal supply basin. Arch's core business is supplying cleaner-burning, low-sulfur thermal and metallurgical coal to power generators and steel manufacturers on four continents. In 2010, Arch's overall lost-time incident rate of 0.46 per 200,000 employee-hours was less than one-fifth the national coal industry average of 2.52 per 200,000 hours worked.