The company also said it wants to raise thermal coal capacity, increasing output to 1.7 million tonnes from 1.4 million tonnes.
The expansions are due for commissioning in 2009-10 and will cost $18 million for increased stockpiling and materials handling and $12 million for the coal preparation plant.
The rise in output is planned to coincide with an expansion in coal handling by Port Waratah Coal Services, expected in the fourth quarter of next year, boosting coal exports to 113 million tonnes a year, up from 102 million tonnes.