Gloucester Coal operates two open cut mines, Stratford and Duralie in the Gloucester Basin and Donaldson Coal in the Newcastle coalfield, which consists of two underground mines, Tasman and Abel. In Queensland, Gloucester Coal has joint control and holds a near 50% interest in Middlemount, located in the Bowen Basin. The company has coal reserves of 275 million tons and measured and indicated resources of more than 1.1 billion tons.