Alpha Natural Resources, Inc., together with its subsidiaries, engages in producing, processing, and selling steam and metallurgical coal in the United States. The company has mining operations in Virginia, West Virginia, Pennsylvania, Kentucky, and Wyoming. As of December 31, 2011, it owned or leased approximately 4.7 billion tons of proven and probable coal reserves; and operated 145 mines in northern and central Appalachia and the Powder River basin. The company is also involved in repairing and reselling equipment and parts used in surface mining; manufacturing particulate scrubbers and filters for underground diesel engine applications; rebuilding underground mining equipment; and providing coal and environmental analysis, and degassing services. In addition, it engages in the sale of non-strategic assets, such as timber, gas, and oil rights, as well as the lease and sale of non-strategic surface properties and reserves; coal brokerage; and road construction business. The company serves electric utilities, steel and coke producers, industrial customers, and energy traders and brokers. Alpha Natural Resources, Inc. was founded in 2002 and is based in Abingdon, Virginia.