Teluk Bayur coal field is geologically located in Telu Bayur District, Berau Regency in East Kalimantan. The geological formation of Telu Bayur Block and Sambaliung Block consist of multiple coal seams that providing coal seam thickness up to 16 meters with average dip of 50 degree. The multi seam coal deposit of Teluk Bayur Coal Mine has total recoverable reserves of over 150 million tons in depth of 120 m enabling the operation for 30 years to maintain