The property was mined until by Magma Copper who ceased production in 1999. Quadra purchased the property in 2004 and production restarted for an estimated capital cost of US$60M. In 2010 Quadra merged with FNX Mining to become Quadra FNX Mining Ltd. In February 2012 KGHM acquired Quadra FNX. Dewatering of the Ruth Pit.In 2010 mining commenced from the Ruth Pit which intersects the water table. Dewatering will be required to allow mining through to 2018.