ST. LOUIS (October 27, 2005) – The board of directors of Arch Coal, Inc. (NYSE: ACI) has declared a quarterly dividend of $0.08 per share on the company's common stock. The dividend is payable December 14, 2005, to shareholders of record on December 2, 2005.

St. Louis-based Arch Coal is the nation's second largest coal producer and mines low-sulfur coal exclusively. Through its subsidiary operations in West Virginia, Kentucky, Virginia, Wyoming, Colorado and Utah, Arch provides the fuel for approximately 7 percent of the electricity generated in the United States.