The WDBA said it is continuing to work on the request for qualifications (RFQ) and will be making an announcement “within a short period of time”.
The authority, which is seeking a new chairman following the resignation of Mark McQueen last month, added that it is still working within the 18-month procurement process.
Federal Infrastructure Minister Amarjeet Sohi is to visit the future site of the project today, however he is not expected to announce the shortlisted teams.
As previously reported, six teams are in the running for the P3 with firms including Macquarie, Plenary, ACS, Turner, EllisDon, John Laing and Vinci understood to have responded to the RFQ.
Meanwhile, Sohi said the removal of the P3 screen requirement for projects of more than $100m reflects the need to accelerate and streamline approvals, and to respect recipients' abilities and authorities to build and manage projects as they best see fit.