Mountaineer Wind Energy Center is a wind farm on Backbone Mountain in Preston and Tucker counties in the U.S. state of West Virginia. When it came online in December 2002, Mountaineer was the first wind farm in West Virginia, and the largest east of the Mississippi River. Mountaineer Wind Energy Center is owned and operated by Florida Power & Light. Exelon Generation purchases the power produced by Mountaineer and markets the it across the Mid-Atlantic region through its partnership with Community Energy, Inc., a leading wind energy marketer in the United States.