A tailings dam can be seen at the Rio Tinto Alcan alumina and bauxite mining operation in Gove, also known as Nhulunbuy, located 650km (404 miles) east of Darwin in Australia's Northern Territory July 16, 2013. The frontrunner to become Australia’s next prime minister, Tony Abbott, holds ambitious plans to develop the country's sparse and inhospitable north by 2030 to attract a new wave of mining investment and boost agricultural exports to Asia. Picture taken July 16, 2013. REUTERS/David Gray (AUSTRALIA - Tags: ENVIRONMENT BUSINESS POLITICS)