 The Pakistan Mineral Development Corporation established the Mine Survey Institute at Khewra in 1971 . The institute conducts mine surveys , organizes mining @-@ related courses for the miners and has establishes the Khewra Model High School and the Khewra Women College . More recently the miners won an important environmental case against the mining company for the provision of unpolluted drinking water . The water available to the residents of Khewra had been polluted by salt , coal and other nearby mining activity . This case is internationally recognised as important with regard to the relationship between humanity and the environment . 
