Steel Girder Installation Continues

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For immediate release: August 20, 2015


Tappan Zee Constructors, LLC (TZC) will continue installing structural steel girders for the New NY Bridge project next week. Smaller girder sections will be lifted into place by cranes from the Rockland trestle near the South Nyack shoreline. Local ironworkers will then bolt together the steel blue girders and cross beams that will support the new bridge’s concrete road deck.

In addition, the I Lift NY super crane will continue placing larger girder assemblies next week and beyond, averaging two placements a week. A total of 31 miles of steel girders cumulatively weighing more than 100,000 tons will be installed for the new twin-span bridge.

Two northbound lanes of the New York State Thruway (I-87/I-287) will be closed during the overnights of Monday, August 24 and Tuesday, August 25 across the existing Tappan Zee Bridge to facilitate surveying efforts.

I-287/I-87 Lane and Ramp Closures on the Tappan Zee Bridge

Mon., 8/24 8 p.m. – One right lane
9 p.m. – Two right lanes
5 a.m., Tue., 8/25 Northbound Across the
Tappan Zee Bridge
Tue., 8/25 8 p.m. – One right lane
9 p.m. – Two right lanes
5 a.m., Wed., 8/26 Northbound Across the
Tappan Zee Bridge

Dredging Operations Continue
TZC will continue the second stage of dredging operations near the Westchester shoreline as part of the preparation for removing the existing bridge and completing the landing of the new southern span. Dredging is allowed during a three-month period from August 1 to October 31 in specified locations and will be conducted 24/7 to complete the required dredging during the short window of time. The window was established to avoid impacting migration and spawning patterns of endangered sturgeon and other fish species.

Installation of Noise Barriers in South Nyack
Next week also will see continued installation of foundations for noise barriers along the southbound Thruway between the South Broadway bridge and River Road in S. Nyack. The work will involve drilling holes into the soil to install the foundations. After the foundations are installed, concrete panels that form the noise barriers will be installed. The barriers will be treated with sound-absorbing material to further reduce traffic noise to the nearby community.

Additional work includes:

  • Pile cap foundation construction
  • Placement of Steel Girder assemblies
  • Dredging
  • Main span foundation construction
  • Landing abutment concrete work
  • Support for river-based work from the Rockland trestle
  • Survey inspections on the existing bridge
  • Westchester landings utility work

Boater Safety
During the summer months, Westchester and Rockland Marine Units will add extra patrols to monitor the construction zone and encourage all boaters to obey the established U.S. Coast Guard safety protocols.

The U.S. Coast Guard has established a Safety Zone surrounding 16 construction barge mooring locations at the project site. No unauthorized vessels are allowed in the Safety Zone. In addition, marine law enforcement will be enforcing the rules of the expanded Regulated Navigation Areas (RNAs) east and west of the Safety Zone. The RNAs stretch 500 yards north and 500 yards south of the existing bridge. Boaters are urged to transit the main channel with no wake at a maximum speed of 5 knots and to use extreme caution on the river at all times.

More New NY Bridge boater safety information, including the U.S. Coast Guard Notice to Mariners and construction site maps, can be found here at An interactive map showing vessel locations on the Hudson River is also available here for recreational and commercial boaters to get updated information on the very active construction zone. The GPS tracking map is for informational purposes and not intended for navigation.

Mariners also should be aware that TZC will continue work in the vicinity of the side channels under the existing bridge. Additional temporary navigational lights have been installed to further define the 600-foot navigation channel under the main span. Permanent elements of the new bridge are lit per U.S. Coast Guard requirements, as are all moorings, barges and other equipment.

All lane closures are subject to change due to traffic, weather or emergency situations. Please visit for real-time information regarding traffic conditions.


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