As Indonesia is positioning the geothermal energy as its strategic power source, the country holds the world's largest amount of potential geothermal resources around 40%. The enhancement of geothermal power projects is one of the strategic and environmental friendly energy sources, which also becomes the priority of the Government of Indonesia in securing alternative energy sources.This is in line with the Government's policies in energy diversification, fuel oil (Bahan Bakar Minyak = BBM) consumption reduction and anticipating the rise in electricity demands in lndonesia, especially in North Sumatera.Sarulla Geothermal Project is a core part of the Indonesian government's electricity development program (the FastTrack Program II) and a private sector financed geothermal project to successfully conclude power purchase arrangements under that program. To support the electricity demands in North Sumatera, Sarulla Operations Ltd. ("SOL") has built the largest geothermal power plant in the world in a single contract with the capacity of 3 x 110 MW ("Project"). The location of the Project is Pahae Julu and Pahae Jae Districts, North Tapanuli Regency, North Sumatra Province.The Project will be fueled by steam and brine from two production and injection facilities at Silangkitang ("SIL") and Namora-I-langit ("NIL") reservoirs. The plants of the Project will apply Geothermal Combined Cycle Units ("GCCU") which are more efficient than conventional flash type geothermal power plants. The plants will capture the steam and brine from the wells and produce energy throughout the day and is intended for base load operation. The condensate steam and the brine water will be re-injected into underground via wells to maintain sustainable geothermal resources. The Project also include approximately 20 km transmission line from plants to the 150/275 KV substation.