Winchester South is located in Queensland near the township of Moranbah in the Central part of the Bowen Basin which contains numerous important coal producing intervals in the Permian stratigraphy. Coal seams are found in Late Permian Rangal Coal Measures, the Ft. Cooper Coal Measures and the Moranbah Coal Measures. The main host-rock types of these sub-groups are sandstone, siltstone with minor stratigraphic layers of conglomerate, and tuffaceous bands.

Structurally the deposit is dominated by the Winchester Syncline which has been itself affected by reverse and normal faulting.

Mining Factors:
- Development of this resource has assumed mining using standard large-scale mining equipment.
- The mining method is assumed to include overburden removal via conventional truck and shovel and/or dragline for the open-cut coal mining of the Rangal seams as per neighbouring deposits in the region.

At full capacity Winchester South will target ROM production of approximately 15Mtpa of predominantly high-quality metallurgical coal over a mine life of around 30 years.

Beneficiation: when applied to coal, it is the process of separating mined coal into various density groups through mechanical and dense medium processes.

Metallurgical Factors:
- It is assumed that a combination of density separation (magnetite/water) and fines flocculation processes would be applicable for the processing of Winchester South coal. Further work is required to better understand the washability characteristics of the various seams with a focus on their size distribution given the vitrinite macerals report to the finer fractions.