Recoverable coal reserves are, thus, about 58.6 bt. Some three-quarters (76%) of the proven reserve is at a depth of less than 300 m, and 61% of the total resources is at a depth of less than 300 m (Mills, 2007). Together the states of Jharkand, Chhatisgarh and Orissa account for 70% of Indian coal resources (Figure 1.10). Only 13% of the coal resource is of coking quality, the remainder is high ash steam coal (Mills, 2007).