ST. LOUIS (July 11, 2007) - Arch Coal, Inc. (NYSE:ACI) today released a report outlining its corporate social responsibility efforts. The report details the company's commitment to the air, land and water; to the communities in which the company operates; and to the highest level of ethical behavior and workplace safety.

"Since Arch's very inception, we've dedicated ourselves to acting in a safe, responsible and ethical manner in everything we do," said Arch Coal's Chairman and Chief Executive Officer Steven F. Leer. "This inaugural report encompasses Arch's strong values and high operating standards."

Arch's social responsibility report is available for download online at: http://www.archcoal.com/community/socialresponsibility.asp.

St. Louis-based Arch Coal is one of the nation's largest coal producers. The company's core business is providing U.S. power generators with clean-burning, low-sulfur coal for electric generation. Through its national network of mines, Arch supplies the fuel for approximately 6 percent of the electricity generated in the United States.