WTC Site Construction Update, February 2008Feb 20, 2008
Construction is well underway at the World Trade Center site in Downtown Manhattan. This month, the Port Authority of New York and New Jersey, the World Trade Center site’s owner, turned over land for Tower 3 and 4 to be developed by Silverstein Properties.
Steady progress continues on the site’s signature elements of the Freedom Tower, the World Trade Center Memorial, and the new transportation hub has been ongoing since April of 2006.
The following lists the major work taking place currently at the site:
Installation of tower-foundation steel columns (two cranes on site)
- Pouring concrete for the foundation and rebar installation for core and sheer wall
- Utility installation and tie-ins
WTC East Bathtub:
TRAFFIC NOTE: The western sidewalk of Church Street is closed between Liberty and Dey Streets. The sidewalk closure protects pedestrians from heavy truck traffic at that area of the site, inside the fence. Traffic enforcement agents and construction flagpeople are on site to direct pedestrians and vehicles.
- Excavation of the south half of the east bathtub completed (sites of Towers Three and Four) as of February 18,2008;Silverstein Properties’s construction team mobilized
- Excavation of the Tower Two site through June 30, 2008; crews will likely begin working double shifts in February 2008
- Installation of mini-piles continues around the 1 train box, which runs through the WTC site along Greenwich Street
- Slurry wallinstallation was completed in mid-May 2007 in the bathtub’s south half; installation oftiebackstook place through late 2007
National September 11th Memorial and Museum:
- Foundation work began in March 2006 and continues.The first phase of structural framework installation is underway.
- Concrete footings for the Memorial are being poured.
- Liner wall cassions are being installed.
- Slurry wall reinforcement began in October 2007.
- The first pieces of steel are expected to be erected in the north footprint in January 2008.
- Memorial crews plan to remove the ramp into the WTC site by April 2008 to continue construction on the south footprint.
- Concrete contract award 2/08; MEP contract award 3/08; steet contract award, 6/08
- To date, the World Trade Center Memorial Foundation has raisedmore than$300 million towards its $350 million private fundraising goal.
WTC Transportation Hub:
Special work notice: A new temporary entrance to the WTC PATH station opened on June 16, 2007. The entrance is located just south of the current entrance, and allows Port Authority crews to deconstruct the current temporary entrance and canopy.
It is scheduled to be in place through approximately late March/early April 2008, when a new, long-term temporary entrance will replace it on Vesey Street near West Broadway. That entrance will allow for construction of the WTC Transportation Hub’s landmark oculus.
Because ADA access to the WTC E subway station is via the existing WTC PATH elevator on Church Street, the E train will no longer be wheelchair-accessible at that station beginning late first quarter 2008.
- Construction of the new, long-termtemporary PATH entrance on Vesey Street at West Broadway.
- Excavation and site preparation
- Pre-cast concrete arches will be delivered in April 2008, thenthe arches will begin beinginstalled inside the station
- Removal of PATH station ceiling and installation of temporary steel structure beneath the 1 train box
- Long-lead procurements of elevator, escalator, and electrical equipment
- Construction of the West Street pedestrian underpass (the “east-west connector”), to link the WTC with Battery Park City’s World Financial Center; construction of the connector is ongoingat thenorthwest section ofthe WTC site.
130 Liberty Street/Deutsche Bank Building Deconstruction:
A fire inside 130 Liberty Street on August 18, 2007 suspended deconstruction work. Federal, state, and city regulators including the FDNY have inspected the structure, which was damaged from floors 13 through 18. Department of Buildings (DOB) engineers have determined that building’s structure remains intact and there is no risk of collapse.
The fire standpipe in the building was repaired on September 5, 2008, and additional fire safety improvements were implemented, including the restoration of the fire-safe stairway.
The LMDC announced in February 2008 that abatement is expected to restart by March 2008. The new abatement plan will have crews completely decontaminate the building before commencing deconstruction work. Pending regulator approval, the LMDC expects the building to be fully deconstructed by the end of 2008.
Air quality testing at the building continues, with 12 sampling sites in the building’s immediate vicinity operational. Additional monitors are active throughout Lower Manhattan. Air monitoring reports are available here; more information about air monitoring is available here, and on the Lower Manhattan Development Corporation’s website.
At the time of the fire, deconstruction of the former 40-story building was at the 26th floor. The search for potential human remains in the building concluded in early June 2007.