It's newly approved Silvergrass mine will make its margins even fatter.
Pilbara Mining News
The partnership dates back to 1987, in the early stages of the development of the Chinese steel industry.
The iron ore-rich state is the latest of Australia's debt-laden regional governments to announce a selloff of state-owned infrastructure.
The autonomous trucks cut costs by reducing the need to house, feed and employ four drivers.
As a result, the Australian company announced an interim dividend of 10 Australian cents per share - last year the company didn't offer this payout.