Client: New York Thruway Authority
Location: Hudson River North of New York City, NY, U.S.
Tappan Zee Hudson River Crossing Project
The Tappan Zee Hudson River Crossing is being designed and built by Tappan Zee Constructors, LLC (TZC), a consortium of some of the world's best-known and most highly-regarded design, engineering and construction firms, including Fluor, American Bridge, Granite, and Traylor Bros., along with key design firms HDR, Buckland & Taylor, URS, and GZA. TZC is working closely on the project with a team of employees from the New York State Thruway Authority and the State Department of Transportation.
The 3.1 mile twin span cable-stayed bridge with angled main span towers is the single largest bridge construction project in New York’s history. The bridge will revitalize the existing Governor Malcolm Wilson Tappan Zee Bridge that connects Rockland County to Westchester County over the Hudson River.
The Tappan Zee Hudson River Crossing is needed because the number of vehicles crossing the bridge every day far exceeds the number it was designed to handle, traffic jams and delays are a regular occurrence, accident rates are high, and maintenance costs on the old bridge were expected to be $3 to 4 billion over the next 20 years.
After more than a decade of delay, the new bridge to replace the Tappan Zee is becoming a reality. The first span of the new twin-span bridge is scheduled to open in 2016, and the new bridge should be complete in 2018. The new bridge will be designed and constructed to last 100 years without major structural maintenance.
The new bridge will be a visually striking, recognizable landmark, and one of the widest cable-stayed structures of its kind in the world. The Tappan Zee Hudson River Crossing will mean less congestion for motorists, with eight traffic lanes, four breakdown/emergency lanes, and state-of-the-art traffic monitoring systems, as well as a dedicated commuter bus lane from the day it opens. Designed and constructed to be mass-transit-ready, the new crossing will be able to accommodate bus rapid transit, light rail or commuter rail. The bridge will also include a bike and pedestrian path.
The total cost of the new project far less than initially expected. The design-build contract for the bridge will help keep the project on-budget and on-time, because financial risk associated with most cost overruns or schedule delays lies with the contractor, rather than toll payers or taxpayers.
TZC is a strategically formed consortium of design-builders created to deliver the best project team to successfully build the Tappan Zee Hudson River Crossing on time and within budget while achieving the highest environmental standards.
The TZC team partnership is based on aligning cultures within each firm that will steer the strategic planning throughout the project. These key cultures shared by the team start with a no-nonsense outlook on safety. TZC team members all share excellent safety records and invest great resources and planning to ensure that each employee is trained and prepared to work in a safe environment.
TZC has set aside 10 percent of the total project budget as the Disadvantaged Business Enterprise (DBE) goal, which equates to about $314 million in subcontract opportunities. DBEs are encouraged to attend TZC’s monthly orientation meetings, where they can meet with DBE program and procurement team members.
TZC is proud to have been selected to design and build the Tappan Zee Hudson River Crossing. The team understands the importance of this project to the New York area and is committed to supplement the New York State Thru Authority’s Public Information Plan with a proactive approach to public involvement and community outreach. The first span of the new twin-span bridge is scheduled to open in 2016, and the new bridge should be complete in 2018.
To date, the team has placed 143,432 cubic yards of concrete. Main span concrete placement is 80 percent complete, while main span pylons concrete placement is 25 percent complete. Approaches concrete has reached 70 percent completion. The team has erected 46,000 tons of pre-cast concrete and 36,000 tons of structural steel this year.
During the 2016 construction season, the team will primarily focus on structural steel erection, pre-cast deck plank installation and Stage 3 work occurring at the Westchester and Rockland side abutments, tying the bridge from Westchester Shore to Rockland Shore.
Sources: www.newnybridge.com and tappanzeeconstructors.com
Photos Courtesy New York State Thruway Authority.