Previously, I reported that the New York State Thruway Authority has released three design renderings for the replacement of the Tappan Zee Bridge in Westchester and Rockland Counties of New York.  On December 17, 2012, the Thruway Authority selected Tappan Zee Constructors’ $3.142 Billion bid to build the bridge.  Tappan Zee Constructors is a joint venture comprised of  Fluor Enterprises, Inc., American Bridge Company, Granite Construction Northeast, Inc., and Traylor Bros., Inc.  Along with Tappan Zee Constructors, the Thruway Authority also selected Proposal “1”.  Proposal “1” “uses a shallow superstructure and a 350 ft long-span design to minimise the number of piers, provide a sleeker looking bridge that enhances the view of the corridors within the Hudson Valley and also reduce the environmental impacts. The main span is a composite deck cable-stayed structural system with outwardly inclined main span towers that can accommodate future transit system loads.”

Tappan Zee Constructors’ bid was undoubtedly helped by the fact that it owns a “ginormous” crane.  “The colossal, custom-made machine — dubbed the Left Coast Lifter — was used by Fluor Enterprise and American Bridge Co. when they recently worked on the $6 billion San Francisco-Oakland Bay Bridge project….The 400-foot-long crane lifts large pieces of material very quickly, thanks to an arm that is 25 stories tall and can hold up to 3.7 million pounds at a time — equal to about 1,000 cars, according to Liftech, an engineering firm based in California.”

Ultimately, Tappan Zee Constructors won the project because their design and their process was cheaper, quicker and built the bridge with less environmental impact than the other two proposals.