Back Forty is a complex polymetallic deposit. It includes both, sulphide mineralisation and gold-bearing gossans. The Feasilibity Study, released in August 2018, planned for the project's sulphide ore to follow a conventional open pit and differential flotation process to produce copper, zinc and lead concentrates. We estimate 2022 as production start year. 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.