Location of the coal mining area is in the north middle part of Bunyu Island that is unpopulated. GTB has proceeded to production stage after completing stage of construction of production facilities and infrastructure. Currently GTB produces thermal coal containing a low ash and low sulfur content with calorific coefficient between 4,800 kcal/kg and 5,100 kcal/kg. Coal produced by GTB will be used in coal fired power plant both domestically and export markets. GTB also has the capability to mix its coal to raise the overall quality characteristics and to fulfill specific client requirement.