The controversial project will see Abbot Point become one of the world's biggest coal ports.
The
expansion will involve dredging one million cubic metres of spoil near
the Great Barrier Reef which will then be dumped on land.
Conservationists have said the project will have a significant impact on the area's wildlife and surrounds.
The expansion project is key to the success of a coal mine to be built by India's Adani Mining - the Carmichael project. Adani expects to export coal from the expanded port.
Australian Environment Minister Greg Hunt approved the expansion of the project on Thursday. 
