Indonesia is the world’s 5 largest coal producing country after China, United States ofAmerica, India and Australia. Before 2015, Indonesia is the world’s biggest coal exporterwith average production of more than 400 million ton per year in 2012-2015. At the same time, the Indonesia’s coal resources have currently achieved 99.2 billion ton with proven reserves of 13.3 billion ton, mostly distributed in Sumatera, Kalimantan and partially in Papua. Based on the assumption of constant average production per year (461 million ton/year) and no additional data on the proven reserves, Indonesia’s coal reserves are expected to be used up within the next 29 years or precisely in 2046. Coal mining contribution to the economy remains relatively low with only 2.5% on average compared to the country’s Gross Domestic Product (GDP) in the period of 2010-2015 (BPS, 2016). On an average, only 15-25% of the country’s total production is consumed by domestic market (particularly for power generating plant), while most of the production is exported.