Workers of PT Pertamina Geothermal Energi (PT PGE) rotate a valve during a production test at Karaha geothermal well in Tasikmalaya, Indonesia West Java province, April 19, 2014. Karaha Geothermal Power Plant is scheduled to supply power to PLN (State Electricity Company) at the end of 2016, Wawan Darmawan spoke person of PT PGE said on Saturday. Picture taken April 19, 2014. REUTERS/Beawiharta (INDONESIA - Tags: ENERGY BUSINESS)