BHP Billiton plans to invest $6.6bn of a total approved capital investment of $7.4bn to increase the production of iron ore operations in Western Australia.

The firm will invest $3.3bn out of total $3.4bn for the development of Jimblebar mine and rail links, and the procurement of mining equipment and rolling stock, which is expected to deliver 35Mtpa initially.

BHP will invest $1.9bn to develop Port Hedland, two additional berths and shiploaders, a car dumper, connecting conveyor routes and associated rail works and rolling stock.

The firm will also invest $1.4bn for port blending facilities and rail yards for ore blending and expansion of resource life.