Tappan Zee Bridge replacement (2013-2018)
New York replaced its 58-year-old Tappan Zee across the Hudson River with twin cable-stayed spans using a design-build contract. The roughly $4 billion project kept traffic moving throughout and opened the first span in August 2017, ahead of schedule.
Both spans opened by 2018, with the old bridge demolished and removed from the river.
Set the model for twin-span design-build replacement of a heavily used crossing without halting traffic.
The Sagamore project uses the same approach — twin spans, design-build, and maintained traffic — with a similar timeline from award to first opening.
