St. Louis (May 9, 2005) - Arch Coal, Inc. (NYSE:ACI) today announced that David N. Warnecke has been named president of Arch Coal Sales, Arch's sales and marketing subsidiary, effective immediately. Warnecke will report to Paul Vining, who will join Arch in June as senior vice president of marketing and trading.

"We are pleased that Dave has accepted this new position with Arch," said John W. Eaves, Arch's executive vice president and chief operating officer. "In this expanded capacity, he will have responsibility for the day-to-day marketing and trading function of Arch's geographically diverse operations. He will lead our ongoing efforts to establish Arch as a preferred supplier to the nation's power generators through a strategic mix of high-quality products, world-class customer service and innovative fuel sourcing solutions."

Prior to assuming this new position, Warnecke had served as executive vice president of sales and trading for Arch Coal Sales since 2003. He has also held the positions of president of Arch Transportation (1995-1997) and mine manager for Arch's former Pikeville, Ky., operation (1988-1992) during his 18-year tenure with the company. In addition, Warnecke served as manager of crude oil trading for Clark Oil from 1992-1995.

A native of southern Illinois, Warnecke holds a B.S. in Accounting from McKendree College in Lebanon, Illinois.

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