Douglas C. Holsted

Environmental Energy Services, Inc. is engaged in acquisition, development, production and exploration of oil and natural gas properties located onshore in the United States. It focuses on properties which have development and exploration opportunities. The company was founded in June 2001 and is headquartered in Boise, ID.

Wastech, Inc. acquires minority interests in companies and focuses on removing non-hazardous wastes. It was founded in 2004 and is headquartered in Charleston, SC.

Rhino Resource Partners LP is a diversified coal producing limited partnership company, which focuses on coal and energy related assets and activities. It produces, processes and sells high quality coal of various steam and metallurgical grades from multiple coal producing basins in the U.S. It operates through the following four segments: Central Appalachia, Northern Appalachia, Rhino Western, and Illinois Basin. The Central Appalachia segment consists of Tug River and Rob Fork mining complexes. The Northern Appalachia segment comprises Hopedale mining complex, Sands Hill mining complex, and Leesville field. The Rhino Western segment includes the underground mine in the Western Bituminous region. The Illinois Basin segment covers the underground mine, preparation plant, and river loadout facility, a well as Taylorville field reserves. The company was founded on January 11, 2006 and is headquartered in Lexington, KY.

Rhino GP LLC owns and operates coal reserves. The company is headquartered in Greenwich, CT.