Mumbai-listed Adani Enterprises' Carmichael coal mine and rail project in the untapped Galilee Basin is perhaps the largest in the world.
The mine will produce 60 million tonnes a year of thermal coal used in power stations. The project also includes a 189-kilometer rail line north-west of Clermont.
The Australian state of Queensland today gave approval to the project, deputy premier Jeff Seeney said. The coal mine and rail project in central Queensland will be subject to dozens of environmental and social conditions and still is to get federal government nod.
Among the conditions that Adani will have to meet include compensating landholders affected by any harm to water supplies.
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Adani welcomed the approval and said it could now move to the next stage of the project. "We remain committed to delivering the multi-billion dollar project," Adani Chairman Gautam Adani said in a statement.
The Indian Group will use Abbot Point port to export 60 million tonnes of coal a year mined from Carmichael using a combination of open-cut and underground mining.
"It also includes a 189 kilometre rail line, water supply infrastructure, coal handling and processing plant, and off-site infrastructure including workers' accommodation village and airport".