This project demonstrated innovative design in treating acidic drainage to reclaim disturbed lands. When water quality in the pit lake threatened to degrade beyond regulatory compliance levels in 2004, BHP undertook an innovative in-lake water management system, called the Middle Layer Lifting System, to ensure water discharged from the site meets our environmental obligations. The surrounding landscape was also rehabilitated to help manage mine drainage. Waste rock dumps were re-contoured and capped with soil, and more than 500,000 trees were planted. This has encouraged the return of wildlife to the area, including elk and deer. Island CopperÕs engineered pit lake and overall site closure has significantly reduced the cost of treatment and proved effective in reducing the risk of environmental impact. It has also highlighted the importance of the interrelationship between the physical and biological characteristics of a pit lake. The lessons from this experience are now being applied in the design and management of other mining pit lakes more broadly and the site has been recognised publicly for its environmental management and innovation.