The Sleeper project is a former high-grade open pit operation. A Preliminary Economic Assessment was completed in December 2015 with the aim to restart operations treating relatively low grade ore by heap leaching process methods. Wood Mackenzie’s asset reports are built from the bottom up, incorporating a number of granular data metrics to ultimately produce our industry standard cash operating costs. This report contains a detailed asset note giving you a holistic view of the asset, including an operational overview through to a timeline of events from inception to now. This qualitative analysis is supplemented by the associated Excel download which enables interrogation of a whole series of cost and production metrics over the life of the asset.