Alliance Holdings GP, L.P., through its subsidiaries, produces and markets coal primarily to utilities and industrial users in the United States. It produces a range of steam coal with varying sulfur and heat contents. The company operates 10 underground mining complexes in Illinois, Indiana, Kentucky, Maryland, and West Virginia. As of December 31, 2014, it had approximately 1.5 billion tons of proven and probable coal reserves. The company also leases land; and operates a coal loading terminal with a capacity of 8.0 million tons with ground storage of approximately 60,000 to 70,000 tons on the Ohio River at Mt. Vernon, Indiana. In addition, it offers various products and services, which comprise the design and installation of underground mine hoists for transporting employees and materials in and out of mines; design of systems for automating and controlling various aspects of industrial and mining environments; and design and sale of mine safety equipment, including its miner and equipment tracking and proximity detection systems. Further, the company buys and resells coal; and manufactures and sells rock dust. Alliance GP, LLC serves as the general partner of the company. Alliance Holdings GP, L.P. is headquartered in Tulsa, Oklahoma.