The Lockerby Mine is located southwest of the City of Sudbury and was developed and operated by Falconbridge Limited from 1974 until 2004, extracting over 8 million tonnes of ore during that period. First Nickel acquired the Lockerby Mine in June 2005 and commenced commercial production in 2006 extracting an additional 364,000 tonnes to October 2008 when the mine was placed on care and maintenance due to low metal prices. In January 2015, the Company announced the Lockerby Restructuring Plan, which aimed to reduce costs to a level that would enable FNI to continue to operate the Lockerby Mine through 2016. Despite this, the mine ultimately ceased operating in August and was placed on care and maintenance. In September it was announced that the mine would undergo rehabilitation.