“Paul has done an outstanding job leading Arch’s western operations during a period of tremendous growth and change," Arch president and chief operating officer John Eaves said.

Lang will continue to report to Eaves. Reporting to Lang are Bob Shanks, president of Eastern operations; Gene DiClaudio, president of Arch Western Bituminous Region; Ken Cochran, president of Thunder Basin Coal Co; and Jim Kliche, director of operations support.

Lang joined Arch in 1984 and has held various engineering, operations and management positions at the company's operations in both the eastern and western United States, including general manager of Arch's Powder River Basin and southern Wyoming operations from 1998 to 2005.