WTC II
"Construction was supposed to begin in Fall 2004 after the design plans were finalized earlier that year, but the NYPD raised security concerns, which caused extensive revisions to the existing plans, thus delaying the start of the construction of the building by two years. Among the notable changes, the tower was moved further away from the West Highway, and a heavily fortified base to the building was added. In 2006, the Port Authority took over from Silverstein Properties, as the project's developer Tishman Construction Corporation is the construction manager. Construction began in April 2006. Digging the foundation and installing tower-foundation steel columns, concrete, and rebar took twice as long as it normally would. The construction crews were prevented from using heavy machinery to dig the foundation due to the building's location, which is closer to the existing subway line. The building reached grade level by 2010, progressed at a pace of one floor a week, topped out in August 2012, and was structurally completed in May 2013. The building opened on November 3, 2014, and the first 170 employees of anchor tenant Conde Nast began their work there."
WTC II
"Construction was supposed to begin in Fall 2004 after the design plans were finalized earlier that year, but the NYPD raised security concerns, which caused extensive revisions to the existing plans, thus delaying the start of the construction of the building by two years. Among the notable changes, the tower was moved further away from the West Highway, and a heavily fortified base to the building was added. In 2006, the Port Authority took over from Silverstein Properties, as the project's developer Tishman Construction Corporation is the construction manager. Construction began in April 2006. Digging the foundation and installing tower-foundation steel columns, concrete, and rebar took twice as long as it normally would. The construction crews were prevented from using heavy machinery to dig the foundation due to the building's location, which is closer to the existing subway line. The building reached grade level by 2010, progressed at a pace of one floor a week, topped out in August 2012, and was structurally completed in May 2013. The building opened on November 3, 2014, and the first 170 employees of anchor tenant Conde Nast began their work there."