sentences:  On 27 February 2008, Norilsk Nickel through North Star LLC diversified into the coal mining industry by obtaining mining rights for 33.6 million rubles to the estimated 5.7 billion tonnes at the Syradasai Field near the () in Taymyrsky Dolgano-Nenetsky District ().In the coal mining industry, it competes with Rio Tinto and BHP Billiton.North Star LLC (), a firm affiliated with Norilsk Nickel or Nornickel, will develop the field with $1.5 billion in improvements at the Port of Dixon on Cape Chaika () from Nornickel, which owns the port.