The scope of the concrete works includes three run of mine walls along with the coarse ore stockpile tunnels and vaults, requiring roughly 16,000 cubic metres of concrete.

Whittens director Tyron Whitten said the contract reinforced a long-standing relationship with NRW and extended Whittens' presence at Roy Hill.

"We are delighted to be working with NRW again, with whom we most recently collaborated on the Brockman 4 project," he said.

"This upcoming project will require a workforce of approximately 90 people at its peak and we anticipate it will take around seven months to complete."

Whittens is managing several other large projects around the country, including $50 million of concrete construction at Roy Hill for BGC Contracting.

It is also working on a $15.5 million contract at the Boggabri coal handling and processing plant for the Thiess Sedgman joint venture.

"In what is currently a very competitive market, Whittens continues to demonstrate its position as a leader in civil concrete construction by delivering superior quality of workmanship and innovative solutions that results in our company being awarded repeat business with our clients," Whitten said.

The new contract is the latest award from Roy Hill, following Thiess winning a $330 million contract to construct process plant facilities at the mine in May.