A total of 218 coal blocks were allocated to eligible public and private sector companies in pursuance of Section 3 of the Coal Mines (Nationalisation) Act, 1973, during the period 1993 to 2011. Out of 218 blocks, 40 coal blocks have come under production as on date. This was stated by Sh. Piyush Goyal, (Minister of state for Power, Coal & New and Renewable Energy (Independent Charge) in a written reply to a question in the Lok Sabha today.