St. Louis-based Arch Coal is one of the nation’s largest and most efficient coal producers. In total, the company contributes about 12% of America’s coal supply from their 11 mining complexes in Wyoming, Utah, Colorado, West Virginia, Kentucky, and Virginia. Arch Coal, Inc. controls a vast domestic reserve base totaling 2.9 billion tons. Of that total, 90% is low in sulfur and 80% meets the most stringent requirements of the Clean Air Act without the application of expensive scrubbing technology. The company is proud steward of safety and the environment, and has amassed dozens of national and state awards of excellence. Arch Coal is traded on the New York Stock Exchange under the ticker symbol ACI.