The contracts are awarded by Roy Hill Infrastructure to design and construct rail and port facilities along with associated infrastructure to service the project.

Of these two contracts, $56.6m agreement is for the design and construction of rail terminal buildings that also includes a rolling stock workshop, wheel lathe building, loco washdown, warehouse and lay down areas, administration buildings, car parking and associated services.

Meanwhile, $14.5m contract is for the design and construction of port landside facilities including a belt-splice workshop, storage and workshop area with overhead crane and external cold-rooms, maintenance workshop incorporating welding and service bays.

Decmil CEO Scott Criddle said that the contracts are significant win for the company and added that it is delighted to be involved in developing an important new project.

"Decmil has a long history of working within the iron ore sector in the Pilbara and will bring the full extent of our experience and expertise to the design and construction of these facilities for Roy Hill," added Criddle.

Meanwhile, the company has scheduled the commencement of both the projects during 2014.