Joint Venture and 31.9% of the Musselwhite mine. In 2010, Kinross purchased 91% of Red Back Mining for $7.1-billion. The purchase brought with it the two gold mines in Africa (Chirano and Tasiast). Also this year, Kinross acquired the Dvoinoye deposit and the property in Vodorazdelnaya, about north of Kinross’ Kupol operation; and sold 25% of its interest in the Cerro Casale project in Chile to Barrick. The following year, Kinross entered into a share purchase agreement with the State Unitary Enterprise of the Chukotka Autonomous Okrug, whereby it therefore held 100% of the Kupol mine and exploration licenses. Kinross sold its interest in the Crixás mine to AngloGold Ashanti in 2012. In 2013 the company's silver production was 9 million ounces, making the company the 18th largest silver producer in the world at the time. Kinross' proven and probable gold reserves were 33.2 million ounces as at December 31, 2015. This total includes reserves from inactive mines, Cerro Casale (5.8 million ounces) and Maricunga (1.0 million ounces). In 2015, Kinross produced 2.59 million ounces of gold. Kinross was listed as fifth largest gold producer worldwide in 2015. As of December 31, 2015, Kinross reported its White Gold project was a pre-development property. In December 2017, Kinross acquired mineral rights to Gilmore, or Parcel G, a 709-acre tract adjacent to its Fort Knox Gold Mine, about 25 miles northeast of Fairbanks, Alaska. Estimates valuate the land as containing 2.1 million ounces of gold. On March 15, 2018, Kinross announced its adoption of a new shareholder rights plan, effective March 29, 2018, replacing the current shareholder rights plan, which expires March 29, 2018. Operations As of 2018, Kinross Gold operates mines in North and South America, Russia, and West Africa. 60% of Kinross gold production comes from the United States and Brazil, while Russia and West Africa (Mauritania and Ghana) each account for 20% of the company's production. Fort Knox Its Fort Knox gold mine property counts with a mill, tailings storage, heap leach facility, the Gil project, and the True North open pit mine, which is closed and under monitoring. In 2015 the mine produced about 401,500 gold equivalent ounces of gold. Expected to run out of ore in 2021, the mine's life has been extended to 2027 following Kinross' $100 million expansion investment announced in 2018, increasing life-of-mine production by about 1.5 million gold equivalent ounces. Round Mountain The Round Mountain Gold Mine is located in Nye County, Nevada and has operated since 2003. Round Mountain was a joint venture between Round Mountain Gold Corporation (a Kinross subsidiary) and Barrick Gold. Kinross' merger with Echo Bay Mines gave them a 50% share of Round Mountain, with Barrick retaining the remainder. In 2016 Kinross purchased Barrick's 50% interest. Round Mountain is located in an area where mining has taken place since 1906, having produced 350,000 ounces of gold over a sixty-year period. Its production volume was approximately 197,000 gold equivalent ounces for 2015. the mine was undergoing expansion to increase the size of the pit and related infrastructure. In September 2017, Kinross announced the Phase W expansion project for Round Mountain. Phase W is expected to extend mining at the site by five years and to increase its life-of-mine production by 1.5 million Au oz. and is predicted to generate incremental cash flow of $265 million, with a sustained annual production of about 341,000 au oz. through 2024. This top performing mine benefits from one of the top mining locales in the world. Class Action Lawsuits In 2012, securities class action lawsuits launched in the U.S. and Canada alleged that