A $5 billion infrastructure corridor planned for South Australia will provide for an eight-fold increase in iron ore exports, the state government says.
The government has declared the Braemar Bulk Export Project a major development, subjecting it to the most stringent environmental and economic assessment.
If approved it will link the upper Spencer Gulf to iron ore resources in the state's north-east and includes four underground iron ore slurry pipelines, roads, a power transmission network, fibre optic communications and four water pipelines.
A floating processing, storage and offloading facility has also been proposed in Spencer Gulf, four kilometres from the coast near Wallaroo.
The state's Infrastructure and Mineral Resources Minister, Tom Koutsantonis, said the corridor would provide a low-cost, high-volume export solution for transporting iron ore to port.
"The project will allow for an eight-fold increase in the amount of iron ore currently being exported and provide a 385-kilometre infrastructure corridor," Mr Koutsantonis said on Tuesday.