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?
Sentence (from "Belle Ayr Mine"): The mine is currently owned and operated by Alpha Natural Resources after being acquired in a merger with Foundation Coal in 2009.
Relevant evidence: Yes