Australian Greens Deputy Leader and Senator for Western Australia Scott Ludlam commented on today's announcement by WA Premier Colin Barnett of his preferred partner in his quest to destroy the Beeliar Wetlands.

"The Premier, along with Leighton holdings, appear to have learned nothing from community campaigns like James Price Point, like the response to the shark cull.

The Perth Freight Link has hit another major hurdle with revelations in Senate Estimates hearings that the Turnbull Government may not fund the project at all, and that a final decision on that Commonwealth funding is still months away.

"Premier Barnett is proceeding as though Commonwealth funding of the project is guaranteed, and Tony Abbott would have him believe that was true.

The Australian Greens have noted the long-anticipated release of Infrastructure Australia's sketchy assessment of the Perth Freight Link project.

"We can understand now why the Barnett Government is so reluctant to release information about the Freight Link. Every time someone does, it damages the case," Senator Scott Ludlam said today.

"The assessment reveals that the Barnett government did not bother to compare the Freight Link with the costs and benefits of developing a dedicated road and rail link to the Outer Harbour in Cockburn Sound.

The Senate has ordered the Federal Government to produce key documents relating to the Perth Freight Link, supporting a Greens' motion moved by Senator Scott Ludlam this afternoon.

"The WA and federal government have committed more than $1.6 billion of taxpayers' money to an unplanned, maligned and destructive freight freeway that will disfigure suburbs across Perth's southern suburbs, and they've done so without producing any meaningful reports or data to justify their position," Senator Scott Ludlam said today.