ST. LOUIS (August 3, 2007) - The board of directors of Arch Coal, Inc. (NYSE:ACI) has declared a quarterly dividend of $0.07 per share on the company's common stock. The dividend is payable September 14, 2007 to shareholders of record on August 31, 2007.

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.