Arch Coal and International Coal Group Announce Expiration of Hart-Scott-Rodino Act Waiting Period

Arch Coal, Inc. ACI and International Coal Group, Inc. ICO today announced that the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, for Arch's pending acquisition of ICG expired on May 31, 2011. Expiration of the waiting period under the HSR Act satisfies one of the conditions necessary for the consummation of the tender offer. Consummation of the tender offer remains subject to other customary conditions, including the tender of a majority of the outstanding shares of ICG's common stock on a fully diluted basis. The tender offer to acquire all of the outstanding shares of ICG common stock at a price of $14.60 per share in cash, without interest and less any required withholding taxes, is scheduled to expire at 8:00 a.m., New York City time, on June 14, 2011, unless the tender offer is extended or earlier terminated in accordance with the rules and regulations of the Securities and Exchange Commission and the merger agreement governing Arch's pending acquisition of ICG.