HDG International Group and its subsidiaries are leading coal

Coal

Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure...

, natural gas

Natural gas

Natural gas is a naturally occurring gas mixture consisting primarily of methane, typically with 0–20% higher hydrocarbons . It is found associated with other hydrocarbon fuel, in coal beds, as methane clathrates, and is an important fuel source and a major feedstock for fertilizers.Most natural...

 and oil producers with significant operations in the central Appalachian area of the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. Their reserves consist of over 4 billion tons primarily consisting of high Btu, low sulfur steam coal that is currently in high demand in the United States and international coal markets.

The HDG International Group’s global headquarters is in Charlotte, North Carolina

Charlotte, North Carolina

Charlotte is the largest city in the U.S. state of North Carolina and the seat of Mecklenburg County. In 2010, Charlotte's population according to the US Census Bureau was 731,424, making it the 17th largest city in the United States based on population. The Charlotte metropolitan area had a 2009...

.

HDG International Group, produce, process and sell steam and metallurgical coal from ten regional business units supported by active underground mines, 7 active surface mines and 4 coal preparation plants located throughout Tennessee, West Virginia, Kentucky and Pennsylvania.

Sources

• Annual Energy Review 2006, DOE/EIA-0384(2004), Energy Information Administration
  Energy Information Administration
  The U.S. Energy Information Administration is the statistical and analytical agency within the U.S. Department of Energy. EIA collects, analyzes, and disseminates independent and impartial energy information to promote sound policymaking, efficient markets, and public understanding of energy and...
  
  : Washington, DC, 2007; 206.
• McDaniel, J; Kitts, E. A West Virginia Case Study. Electronic slide presentation In Mining and Reclamation Technology Symposium, Morgantown, WV,
• Longwall Mining, DOE/EIA-TR-0588), Energy Information Administration
  Energy Information Administration
  The U.S. Energy Information Administration is the statistical and analytical agency within the U.S. Department of Energy. EIA collects, analyzes, and disseminates independent and impartial energy information to promote sound policymaking, efficient markets, and public understanding of energy and...
  
  : Washington, DC, 1995; 34-35. Minerals Yearbook 1973, Coal—Bituminous and Lignite chapter, U.S. Department of the Interior, Bureau of Mines: Washington, DC; 353.
• Annual Coal Report, DOE/EIA-0584(2006), Energy Information Administration
  Energy Information Administration
  The U.S. Energy Information Administration is the statistical and analytical agency within the U.S. Department of Energy. EIA collects, analyzes, and disseminates independent and impartial energy information to promote sound policymaking, efficient markets, and public understanding of energy and...
  
  : Washington, DC; 22; http://www.eia.doe.gov/cneaf/coal/page/acr/acr_sum.html , (accessed September 2005).(http://www.eia.doe.gov/fuelcoal.html