The New NY Bridge project reached another key milestone this month by beginning the installation of nearly 6,000 high-strength concrete deck segments for the new crossing’s approach spans. Project cranes are lifting the prefabricated deck panels into place atop previously-installed structural steel girders. The deck segments are prefabricated at an off-site location and barged down river from the project’s Port of Coeyman’s facility in Albany County. Tappan Zee Constructors, LLC (TZC) will continue installing the approach span deck sections over the coming year.
All-Electronic Toll Collection Gantry Work
Construction of the project’s temporary all-electronic toll collection (AETC) system in Rockland County will continue near the exit 10 (Nyack – South Nyack – US Route 9W) on-ramp to southbound New York State Thruway (I-87/I-287). The work will necessitate closing the on-ramp during upcoming weekday overnights through Friday, Nov. 6. Drivers will be directed to use the on-ramp from Route 59 in Nyack, as shown in the graphic below. The work also requires double-lane closures this Thursday and Friday overnights. Specific lane and ramp closure times are listed in the chart below.
|DATE:||CLOSURES BEGIN:||CLOSURES END:||LOCATION:|
|Thu., 10/29||8 p.m. – One left lane
9 p.m. – Two left lanes
|6 a.m., Fri., 10/30||Southbound I-87/I-287
from exit 12 to exit 10
|Fri., 10/30||8 p.m. – One right lane
9 p.m. – Two right lanes
|6 a.m., Sat., 10/31||Southbound
from exit 12 to exit 10
|Mon., 11/2||10 a.m. – One right lane||2 p.m.||Northbound
from exit 8 to the bridge
|Mon., 11/2||9 p.m. – Ramp closure||5 a.m., Tue., 11/23||Southbound
exit 10 on-ramp
|Tue., 11/3||9 p.m. – Ramp closure||5 a.m., Wed., 11/4||Southbound
exit 10 on-ramp
|Wed., 11/4||9 p.m. – Ramp closure||5 a.m., Thu., 11/5||Southbound
exit 10 on-ramp
|Thu., 11/5||9 p.m. – Ramp closure||5 a.m., Fri., 11/6||Southbound
exit 10 on-ramp
|Fri., 11/6||9 p.m. – Ramp closure||5 a.m., Sat., 11/7||Southbound
exit 10 on-ramp>
Steel Girder Installation
Next week, TZC will continue installing structural steel girder assemblies from the new bridge’s Westchester landing in Tarrytown. The assemblies will connect the future westbound span’s on-land abutment to the first offshore support pier in the Hudson River. To install the assemblies, TZC has engineered a simple yet innovative solution: Literally push them west over the Metro-North Railroad Hudson Line’s tracks toward the first pier in the river, as seen in this animation. As the operation progresses, additional girders will be connected to the assembly and pushed farther westward. TZC is closely coordinating the effort with Metro-North, ensuring that the operation maximizes safety for both workers and the public and minimizes impacts to rail service.
While the entire operation is anticipated to conclude by the end of the year, work over the Metro-North tracks will occur during two Friday overnights, one in November and one in December, which will be announced in advance to enable Metro-North riders to plan ahead. Metro-North has adjusted its schedule slightly to allow the work to be completed during the installation. TZC will suspend construction activities when trains pass through the area, resuming when given the “all clear” instruction by Metro-North.
Across the river, TZC also will continue installing steel girders near the South Nyack shoreline. Safely accomplishing the work will require reducing River Road to one lane during weekdays between 6 a.m. to 5 p.m. Flag persons will keep traffic moving by alternating the directional flow between north and south.
Smaller girder sections will be lifted into place by cranes from the Rockland trestle in South Nyack. Ironworkers then bolt together the girders and cross beams that will support the new bridge’s concrete road deck. In deeper water, the I Lift NY super crane will continue placing larger girders, 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.
Construction will continue on the new bridge’s iconic towers, which will eventually rise 419 feet above the river. Innovative self-climbing jump forms enable TZC workers to build the towers in segments that progressively “jump” up from the foundations to their full height. Within the jump forms, workers assemble steel reinforcement cages that are then encased in concrete, one segment atop the previous one and so on. Eight towers will be constructed on the project’s football-field-long main span pile caps over the coming year, as seen in this animation.
Installation of Noise Barriers in South Nyack
Next week will see continued installation of foundations for noise barriers along the southbound Thruway between the South Broadway bridge and River Road in South Nyack. The work involves 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:
- Support for river-based work from the Rockland trestle
- Survey inspections on the existing bridge
- Westchester landings utility work
Westchester and Rockland Marine Units are continuing 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 atNewNYBridge.com. 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 https://www.thruway.ny.gov/travelers/map/ for real-time information regarding traffic conditions.