 Rio Tinto Coal Australia manages the operation on behalf of the joint venture partners, Rio Tinto Coal Australia (82 per cent), Nippon Steel Corporation (8 per cent), Marubeni Coal (6.66 per cent), and Sumisho Coal Development (3.34 per cent).Kestrel Mine, located in Queensland's Bowen Basin northeast of Emerald and west of Rockhampton, is an underground longwall operation supplying world markets with premium quality high volatile coking coal as well as thermal coal.Kestrel Mine was previously known as Gordonstone Mine under management by mining company ARCO.