The three left lanes of the northbound New York State Thruway (I-87/I-287) will be closed from exit 9 (Tarrytown – Sleepy Hollow – NY Route 9) to exit 10 (Nyack – South Nyack – Route 9W), including the Tappan Zee Bridge, from 9 p.m. to 5 a.m. on the overnights of Monday, April 13 and Tuesday, April 14. One lane will remain open during the closures. The closures are necessary to accommodate road-striping work.
Demolition of Former State Police Facility
Demolition of the former New York State Police Troop T barracks in Tarrytown will continue during the week of April 13, 2015. The former barracks at 333 South Broadway, which adjoins the former Tappan Zee Bridge maintenance facility, is being removed to facilitate construction of the new bridge. The State Police and bridge maintenance teams have moved from Tarrytown to a temporary home near exit 12 in West Nyack until their new facilities in Tarrytown are completed in 2018.
Temporary All-Electronic Toll Collection system
Tappan Zee Constructors, LLC (TZC) will continue constructing the Thruway’s temporary all-electronic toll collection system by installing foundations for the overhead gantry on the right side of the southbound Thruway near exit 10 in South Nyack. TZC will drill holes in the soil and rock to create reinforced concrete foundations. Noise levels will be monitored and noise attenuation procedures are in place to reduce impacts on local residents. The work will require closing the right lane of the southbound Thruway near exit 10 (Nyack – South Nyack – Route 9W) between 10 a.m. and 3 p.m. on Tuesday, April 14; Wednesday April 15; and Thursday, April 16.
River Road in South Nyack
River Road traffic lanes will undergo a slight shift as modifications to the adjacent project work zone are implemented. The adjustments may require reducing River Road to one lane at times. TZC flag persons will direct traffic as needed and additional signage and other safety measures will be in place.
Foundation Work on the New Bridge
Marine crews will continue working on the foundations for the new bridge next week by placing reinforcing steel and concrete in the piles, main span pile caps and approach span pile caps. The high-strength concrete is made on site by the project’s two floating batch plants, which recently returned to service. Teams also will erect formwork for the cast-in-place pier columns, which eventually will support the new bridge’s road deck. With only a small percentage of piles left to install, pile driving operations will continue next week. The periodic pile driving is restricted to 7 a.m. to 7 p.m., Monday through Friday and noon to 7 p.m., Saturday.
Crews also will continue working on the bridge’s landings at the Rockland and Westchester shorelines. The abutments, comprised of steel and concrete, will serve as strong bases where the new crossing meets the landside roadway. The foundation work in South Nyack utilizes sheet piles to support the soil during construction of the foundation walls. Sheet pile installation will continue during daytime hours and noise attenuation procedures are in place to reduce impacts on local residents. Environmental engineers will be on site to monitor the noise levels during sheet pile installation.
TZC will continue concrete placement for foundations near the South Nyack shoreline. The concrete for this work is being acquired from local concrete suppliers and is delivered by truck to the Rockland trestle located off the Thruway’s southbound access ramp. Trucks exit the trestle to the Thruway via the northbound access ramp. The access ramps are used only by construction vehicles, providing a safe route directly to the work site and reducing traffic impacts on local roads.
Additional work includes:
- Pile cap foundation construction
- Main span foundation construction
- Concrete placement for foundations
- Landing abutment concrete work
- River Road utility work
- Support for river-based work from the Rockland trestle
- Survey inspections on the existing bridge
Boater Safety
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.
