nbsp 0183 32 Ravensthorpe Nickel Operation is a nickel mine and hydrometallurgical processing plant located 550 kilometres 340 mi southeast of Perth and 35 kilometres 22 mi east of Ravensthorpe Western Australia at Bandalup Hill Ravensthorpe cost BHP Billiton US 2 2 billion to build but led to 3 6 billion in write downs when it was shut down in