ST. LOUIS (October 2, 2006) – Arch Coal, Inc. (NYSE:ACI) today announced that Jennifer J. Johnson has been named President of Arch Energy Resources, and will report to David Warnecke, Arch Coal's vice president of marketing and trading.

In this new role, Johnson will be responsible for developing and implementing a corporate strategy for revenue risk management and optimization of Arch Coal's annual coal supply of more than 140 million tons.

The Arch Energy Resources group will encompass the coal and emissions trading, coal procurement and terminal management activities. Reporting to Johnson will be Calvin Hall, director of procurement for Arch Coal Terminal, and Steve Watson, Arch Coal's manager of revenue and trading.

Johnson also will serve as one of Arch's representatives on the Management Committee of Dominion Terminal, a shared-ownership port facility in Newport News, Va.

"Jennifer's power generation experience and background in strategic planning will be very valuable," said John W. Eaves, Arch's president and chief operating officer. "Jennifer has both the capabilities and the drive to take Arch Coal to the next level in revenue and margin optimization."

Johnson has 10 years of experience with one of the largest U.S. power producers, Dynegy, Inc. Most recently, she served as Vice President of Corporate Strategic Planning, and previously held the position of Vice President of Fuels and Emissions at Dynegy.

Johnson graduated from Baylor University with a degree in Marketing Business Administration. She will relocate to St. Louis.

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.