Bituminous coal is mined from the Permian Moranbah and Rangal Coal measures. Products range from premium quality, low volatile, high vitrinite, hard coking coal to medium volatile hard coking coal, to weak coking coal, some pulverised coal injection (PCI) coal and medium ash thermal coal as a secondary product.

Moranbah Coal Measures of Late Permian age dipping at 2–12° to the east; up to eleven coal seams/major seam splits are present. They are the S, R, Q, P1, P2, Harrow Creek Upper and Lower, DysartK, Dysart Upper 1 and 2, and the Dysart Lower 2 seams. Mining is mainly confined to the Harrow Creek and Dysart seam sequences, which average 4–5m each in thickness.

Peak Downs is open-cut, using dragline and truck and shovel fleets for overburden removal.

Impurities are removed through washing and treatment at a coal handling and preparation plant. Coal is then transported by train to port, loaded onto ships and exported to our customers.

Conveyor transports ROM coal from Peak Downs Mine to the Caval Ridge Mine CHPP.

ROM coal is transported by dump truck to the Northern ROM Hopper before being transported via overland conveyor to the crushing station where it is crushed, screened and stacked. The CHPP is fed by a single feed conveyor with a feed rate capacity of 2,750 tonnes per hour (tph) through two modules of 1,375 tph each.

Product coal is conveyed through a transfer station to a stacking conveyor and stacker to the product coal stockpiles. The product coal is reclaimed and discharged through a batch weighing bin to the TLF. A reject conveyor discharges coarse and fine rejects to the reject bin. Process plant water is recycled to minimise raw water make-up requirements for Caval Ridge Mine. The CHPP ........