Gunung Bara Utama GBU Coal
PT Gunung Bara Utama (GBU) is a privately owned Indonesian mining company established in March 2007. The company primarily conducts business in coal mining and mining related activities. GBUs concession area of 5,350 Ha is located in Mantar village, Damai subdistrict, West Kutai Regency of East Kalimantan, Indonesia.