In May 2020, Rio Tinto achieved notoriety for its blasting of archaeologically highly significant and also culturally sensitive Australian Aboriginal sacred sites in Juukan Gorge in order to expand Brockman 4.

Mining incorporates a fleet of fifteen Komatsu 830E haul trucks.

The ore is processed on site in the plant to produce lump (<31.5mm, >6mm) and fines (<6mm) product.

[12] Rio Tinto allocated a further A$1.24 billion in early December 2010, to expand the mine as well as develop its Western Turner Syncline project, with the aim of increasing the Pilbara production to 283 Mt per annum by late 2013.

The expansion would make B4 Rio Tinto's second-largest mine in the Pilbara.