ST. LOUIS (February 22, 2007) - The board of directors of Arch Coal, Inc. (NYSE:ACI) today declared a quarterly dividend of $0.06 per share on the company's common stock. The dividend is payable March 15, 2007, to shareholders of record on March 1, 2007.

St. Louis-based Arch Coal is the nation's second largest coal producer. 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.