PT Garda Tujuh Buana Tbk (hereinafter shall also be 
referred to as “GTBO”) was established in 1996. GTBO was 
granted exploitation mining concession. GTBO deals in coal 
mining processing and logistics operations in an integrated 
manner. GTBO performs thermal coal mining and is 
regarded as one of the coal producers, mining and selling 
low calorific value coal which is adequate to meet the 
demand of the costumers. The mine location can be 
reached in about 1 hour trip by speed boat from Tarakan 
Port, Bulungan Regency, North Kalimantan Province. 
In its development, the width of GTBO’s KP changed into 
710 ha based on Decree of Bulungan Regent number 
147/K-III/540/2007 dated 26th March 2007 regarding 
granting of exploitation mining concession. It is stated that 
the width of area owned by GTBO that was initially 
1,995.003 ha becomes 710 ha (decreasing 1,285.003 ha to 
be returned to Regional Government of Bulungan Regency). 
Location of the coal mining area is in the north middle part 
of Bunyu Island that is unpopulated. GTBO has proceeded 
to production stage after completing the stage of 
construction of production facilities and infrastructure. 
Currently GTBO produces thermal coal containing a low 
ash and low sulfur content with calorific coefficient 
between 4,800kcal/kg and 5,100 kcal/kg. Coal produced by 
GTBO will be used in coal fired power plant both 
domestically and export markets. GTBO also has the 
capability to mix its coal to raise the overall quality 
characteristics and to fulfill specific client requirement.