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New York State Thruway Authority

Welcome to the New York State Thruway Authority website for the Tappan Zee Bridge Deck Replacement

Image of workers replacing deteriorated rivets with High Strength Bolts on the Tappan Zee Bridge. Image of workers replacing existing
rivets with high-strength bolts on the Tappan Zee Bridge.

The Tappan Zee Bridge Deck Replacement project, Contract 1, has been part of the Authority’s ongoing commitment to fulfill its responsibility to maintain and operate the bridge by continuing to make the necessary investments to assure safe and efficient travel for the thousands of motorists that cross the bridge daily.

This website is part of a public information program launched by the Authority to keep the public informed about the progress of the project, along with potential impacts of the deck replacement effort.

The Authority also used Dynamic Message Signs (DMS) along the highway and Highway Advisory Radio, 530 AM in the Tappan Zee Bridge Corridor, as well as 1610 AM in the Newburgh area to keep the public informed. Project updates, in addition to weekly construction information, has been sent regularly to the media. 

Since the start of construction (September 2007), a total of 1092 new deck panels have been installed, including 288 on the main span of the bridge, 140 on the west deck truss and 664 on the western causeway.

Although this project is weather sensitive, since all 1092 deck panels and bridge joints have been installed, a list of items of project cleanup work, often referred to as a punch list, is anticipated to be completed in the Winter of 2010.

View of existing steel superstructure after removal of existing deck in the West Deck Truss Section of the Tappan Zee Bridge. View of existing steel superstructure after removal
of existing deck in the west deck truss section of the Tappan Zee Bridge.

Throughout the project, the Authority implemented a number of strategies to minimize the impact of this project on travelers:

  • Deck replacement work will be conducted primarily during off-peak, overnight shifts generally from 8 p.m. until 6 a.m.
  • The Authority will limit the Contractor’s day work, permitting single lane closures as needed.
  • Deck replacement materials will be manufactured off-site, reducing noise on-site and shortening the duration of the project overall.