ST. LOUIS (August 24, 2007) - Arch Coal, Inc. (NYSE:ACI) today announced that its Chairman and Chief Executive Officer, Steven F. Leer, will speak at the Lehman Brothers CEO Energy/Power Conference in New York City on Thursday, September 6, 2007.

Interested investors may access a live audio webcast of the presentation at 1:45 p.m. E.D.T. on September 6 at Arch Coal's Web site at http://investor.archcoal.com/events.cfm. A replay of the webcast also will be available at the same URL for 30 days.

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.