The Mt Polley property consists of 42 mineral claims encompassing 16 440 ha and 5 mining leases. The mine operated between 1997 and 2001 when production was suspended due to the then prevailing low metal prices. Production resumed in March 2005.In August 2014 a breach of the tailings storage facility occurred causing water and tailings to be released into the surrounding area and lake. The mine remained on care and maintenance for a year whilst re mediation and rehabilitation were ongoing. Mount Polley restarted in August 5 2015.