Jul 31 2019 · KOLKATA JSW Steel Limited has been declared as the Preferred Bidder for three iron ore mines with an estimated resource of around 92 97 million metric tonnes MMT in the auctions held by the government of Karnataka in July 2019 The three mines are Narayanpura Manganese Iron Ore Mine Dharmapura Iron Ore Mine BBH Mines the company said in a stock market notification