Question: The Belle Ayr mine is a coal mine located 18 miles southeast of Gillette, Wyoming currently owned and operated by Alpha Natural Resources, a large American producer of metallurgical coal for the industrial production of steel and iron and low-sulfur thermal coal to fuel steam boilers for the production of what type of power?

Context paragraphs:
Foundation Coal: Foundation Coal Holdings, Inc. was a large American coal mining company.  Until its July 31, 2009 merger with Alpha Natural Resources () to form the third largest American coal company, the company was publicly traded on the New York Stock Exchange under the symbol FCL.  With corporate offices in Linthicum Heights, Maryland, the former Foundation Coal operates coal mines in Pennsylvania, West Virginia and Wyoming, and was, prior to its merger with Alpha Natural Resources, the fourth-largest American coal producer by tonnage.

Belle Ayr Mine: The Belle Ayr mine is a coal mine located 18 miles southeast of Gillette, Wyoming in the United States in the coal-rich Powder River Basin.  The mine is an open pit, "truck and shovel", mine producing a low-sulfur, sub-bituminous coal from the Wyodak-Anderson seam that is used for domestic energy generation.  Coal produced by the mine is shipped to its customers via railroad.  The mine is currently owned and operated by Alpha Natural Resources after being acquired in a merger with Foundation Coal in 2009.

Kestrel coal mine: The Kestrel Coal Mine is an underground coal mine located in the Bowen Basin at Crinum, 51 km northeast of Emerald in Central Queensland, Australia.  The mine has coal reserves amounting to 158 million tonnes of coking coal, one of the largest coal reserves in Asia and the world.  The mine has an annual production capacity of 4 million tonnes of coal.  Both hard/semi hard coking coal and thermal coal is mined.

Wyodak Mine: The Wyodak mine is a coal mine located 6 miles east of Gillette, Wyoming in the United States in the coal-rich Powder River Basin.  The operation is an open pit mine that utilizes a truck and shovel mining method to produce a low-sulfur, sub-bituminous coal that is used for domestic energy generation.  The mine ships its coal to the adjacent Wyodak power plant and to other customers via railroad.  The mine is operated by Wyodak Resources Development, a subsidiary of the Black Hills Corporation.

Rawhide Mine: The Rawhide Mine is a coal mine located 10 miles (16.1km) north of Gillette, Wyoming in the United States in the coal-rich Powder River Basin.  The mine is an open pit mine that utilizes a combination of cast blast/dozer push and truck/shovel mining methods to strip an average of 165 feet (50.3m) of overburden off of approximately 105 (32.0m) feet of coal.  Rawhide produces a low-sulfur, sub-bituminous coal from the Roland and Smith seams.  This coal is used for domestic energy generation and shipped to customers via railroad.  The mine is currently owned and operated by Peabody Energy.

Hillsborough Resources: Hillsborough Resources Limited is a coal mining company that operates the Quinsam underground thermal coal mine near Campbell River, British Columbia serving the local and west-coast U.S. cement industry, and the Crossville underground coal mine in Tennessee, U.S. serving the regional power utility and industrial markets.  It also is developing substantial metallurgical coal properties near Tumbler Ridge in the Northeast of British Columbia.  In addition, Hillsborough owns and operates the Middle Point Barge Loading Facility located on Vancouver Island, Canada.

Eagle Butte Mine: The Eagle Butte mine is a coal mine located 7 mi north of Gillette, Wyoming in the United States in the coal-rich Powder River Basin.  The mine is an open pit, "truck and shovel", mine producing a low-sulfur, sub-bituminous coal from the Roland and Smith seams that is used for domestic energy generation.  Coal produced by the mine is shipped to its customers via railroad.  The mine is currently owned and operated by Alpha Natural Resources after being acquired in a merger with Foundation Coal in 2009.

Alpha Natural Resources: Alpha Natural Resources is a large American producer of metallurgical coal ("met coal") for the industrial production of steel and iron and low-sulfur thermal coal ("steam coal") to fuel steam boilers for the production of electrical power.  The company also provides industry services relating to equipment repairs, road construction and logistics with domestic operations and coal reserves within the states of Virginia, West Virginia, Kentucky, Wyoming, Utah, Illinois, Tennessee, and Pennsylvania.  Alpha Natural Resources doesn't produce all of the coal it sells; much of the coal sold by Alpha Natural Resources is purchased from independent mining operations and then resold in the worldwide market.

Dry Fork Mine: The Dry Fork mine is a coal mine located 8 miles north of Gillette, Wyoming in the United States in the coal-rich Powder River Basin.  The mine is an open pit mine that utilizes truck and shovel mining method to mine a low-sulfur, sub-bituminous coal that is used for domestic energy generation and shipped to customers via railroad.  In 2011, the mine is expected to begin supplying coal to the newly constructed Dry Fork power station that has been constructed adjacent to the mine.  The mine is currently owned and operated by Western Fuels Association.

Rolleston coal mine: The Rolleston Coal Mine is an open-cut coal mine located in Central Queensland, Australia.  The mine has coal reserves amounting to 600 million tonnes of thermal coal.  The mine has an annual production capacity of 14 million tonnes run of mine coal.  It is one of numerous coal mines in the Bowen Basin.

Supporting paragraphs: Belle Ayr Mine Alpha Natural Resources
Answer: electrical