An Australian company has received the go-ahead for an enormous project to build railways to carry resources across Western Australia.

NRW Holdings has officially been awarded the rail earthworks contract for the Roy Hill project, meaning the group now has the full construction contract for the main line rail formation between Roy Hill and Port Hedland.

The project will reportedly employ a workforce of 1500 people at its peak.

NRW was allowed to start work on a subcontract of the project in August, though it was capped at $20 million at the time. Now bagging the rest of the deal, NRW’s involvement is in the neighbourhood of $620 million.

The project includes construction of approximately 330 kilometres of main line heavy haul rail formation together with sidings and level crossing and associated works. Over the course of the big build approximately 10.5 million cubic metres of material will have to be moved.

There has been no delay for the company to get stuck-in on the new effort, work has already started and is scheduled for completion in January 2015.