Black Thunder Coal Mine

Said to be the "world's largest single coal-mining complex," based on Arch Coal own statistics, the mine produces more than 10 percent of the U.S. coal supply annually.  Black Thunder extracted 31.6 million short tons from its open pit in 1994, and nearly 60 million tons in 2000. In total, nearly 2.2 billion tons of coal have been mined since 1977. Operated by Arch Coal, which bought out ARCO's Thunder Basin Coal Company in 1998. One of several major mining operations extracting coal from a 50-mile-long seam in the Powder River Basin area, one of the largest coal deposits in the world.