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The '''Black Thunder Coal Mine''' is a surface [[coal mine]] in the [[U.S. state]] of [[Wyoming]], located in Campbell County, Wyoming, in the [[Powder River Basin]], which contains one of the largest deposits of coal in the world. Black Thunder is the second most productive mine in the United States and one of the largest in the world. In 2007 the mine produced 86,196,275 short tons of coal,<ref name="eia">{{cite web|url=http://www.eia.doe.gov/cneaf/coal/page/acr/acr_sum.html|title=Energy Information Administration - Annual Report|accessdate=2008-01-25}}</ref> nearly 20 percent of Wyoming's total coal production, and higher than 23 other individual coal producing states.<ref name="eia" />