In 2003 the company sold a tranche of royalty on the mine's future production, providing interest bearing notes receivable to unitholders. These financial arrangements are not modelled in the accompanying analysis, which excludes the effect of this deferred royalty from 2003 onwards. 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.