IEX to Move New York Office to 4 WTC
November 20, 2014
Silverstein Properties announced today that IEX, a start-up stock market dedicated to institutionalizing fairness through technology, and the subject of Michael Lewis’ book, Flash Boys, has signed a Read more...

WTC Site Construction Update, April 2008

Construction is well underway at the World Trade Center site in Downtown Manhattan. The following lists the major work taking place currently at the site:

Tower Three:
• Excavation
• Preparations for foundation work

Tower Four:
• Excavation
• Preparations for foundation work

Freedom Tower:
• 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

East Bathtub:
• Major excavation of the south half of the east bathtub (sites of Towers Three and Four) from July 2007 through February 17, 2008; Silverstein Properties's construction team is mobilized and preliminary construction is underway
• Excavation of the Tower Two site through June 30, 2008; crews began 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 wall installation was completed in mid-May 2007 in the bathtub's south half; installation of tiebacks took place through late 2007

• Slurry wall reinforcement
• Cassions and mini-piles installation was completed March 2008
• The "Survivors Stairway" was relocated from its original location to the west side of the WTC site, to be incorporated into the underground Memorial by 2009
• The first steel erected in the north footprint in winter 2008
• Memorial crews plan to remove the ramp into the WTC site in summer 2008 to continue construction on the south footprint
• The World Trade Center museum and memorial complex has reached its private fundraising goal of $350 million, its board of directors announced April 9