GTB deals in coal mining processing and logistics operations in an integrated manner. GTB performs thermal coal mining and is regarded as one of the coal producers, mining and selling low calorific value coal. GTB has assured and identified significant reserves of coal which is adequate to meet the demand of the customers. The mine location can be reached in about 1 hour trip by speed boat from Tarakan Port, Bulungan Regency, East Kalimantan Province.