The I Lift NY super crane continues to install structural steel girders for the Rockland approach this 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.
Maintenance Dock Construction
Tappan Zee Constructors, LLC (TZC) has begun constructing a New York State Thruway Authority maintenance dock near the new bridge’s Rockland landing. The work involves partially dismantling the existing work trestle that was used to construct the northern span of the new bridge. Work will take place during daytime hours and will include the installation of several piles to support the dock’s boat slips. The construction efforts are expected to conclude later this year. Pile driving operations will be limited from 8 a.m. to 6 p.m. on weekdays.
Main Span Roadway Installation
TZC has begun installing structural steel and road deck panels for the new bridge’s main span. The first steel sections, resting atop the main span towers’ crossbeams, are 40 feet long. They will serve as central starting points for upcoming sections of steel and road deck, which will be connected to the towers with stay cables to form the main span roadway. The operations are scheduled to begin later this summer.
Noise Barrier Construction
TZC will continue constructing noise barriers along the New York State Thruway (I-87/I-287) in South Nyack next week. The work includes constructing noise barrier foundations and excavating soil along the southbound Thruway between the South Broadway bridge and River Road. After the foundations are established, concrete panels that form the noise barriers will be installed. The barriers will be treated with sound-absorbing material to further reduce traffic noise in the nearby community.
TZC also will continue constructing foundation walls for the future highway and shared-use path along the northbound Thruway in South Nyack. The operation is scheduled to continue in the coming months.
Additional work includes:
- Main span tower construction
- Support for river-based work from the Rockland trestle
- Rockland landing retaining walls
- Survey inspections on the existing bridge
- Utility work at the Westchester landings
- Girder assembly placement
- Bridge road deck installation
- Drainage structure installation
- Maintenance facility construction in Tarrytown
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. The U.S. Coast Guard also has established a safety zone encompassing all navigable waters within a 200-yard radius of the largest machine on the project, the I Lift NY super crane, legally registered with the U.S. Coast Guard as the Left Coast Lifter.
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. The Eastern RNA will be extremely active and vessels transitioning to and from the eastern shoreline at Tarrytown should approach and depart to the north. The Western RNA will be impassable at times and mariners should stay clear of the area.
Boaters are strongly urged to use the center 600 feet of the main channel (when available) to navigate in a north-south direction with no wake at a maximum speed of five knots. Boaters should expect periodic partial closures of the main channel due to construction activities. Tune to Marine Radio Channel 22A for the latest U.S. Coast Guard advisories.
Mariners also should be aware that TZC will continue work in the vicinity of the side channels under the existing bridge. Mariners are advised to stay clear of all overhead work and maintain a safe distance of 1,000 feet from all construction equipment and support vessels. In addition, all bridge piers and abutments are protected by a 25-yard security zone.
Additional temporary navigational lights have been installed on the existing bridge 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 permit requirements, as are all moorings, barges and other equipment. All mariners should consult the latest USCG Local Notice to Mariners before transiting this area.
More New NY Bridge boater safety information, including the U.S. Coast Guard Notice to Mariners and construction site map can be found at NewNYBridge.com/Boater. The page includes an interactive GPS map showing vessel locations on the Hudson River, detailing which vessels are stopped and which are in motion to a new location, for recreational and commercial boaters to get current information on the very active construction zone. The vessel tracking map is for informational purposes and not intended for navigation.