The contract encompasses the upgrading of seven existing stations, installation of rail infrastructure in the tunnel and integration of the new infrastructure into the existing network.
The Unity consortium comprises CPB Contractors, UGL, Aecom and Jacobs, together with partners Hassel, RCS Australia, Acmena, Martinus Rail and Wired Overhead Solutions.
The consortium was announced as preferred bidder for the contract in April.
The public-private partnership Tunnel, Stations and Development (TSD) contract was finalised on July 1 and awarded to the Pulse consortium, which includes Pacific Partnerships, CPB Contractors, UGL, BAM, Ghella and DIF.
The RIS package will be delivered on an alliance basis, with the public and private sector working together in an integrated team.
Due for completion in 2024, Cross River Rail involves building a 10.2km north-south line from Bowen Hills to Dutton Park with a 5.9km twin-bore tunnel and four new underground stations.