The gross cost increase of approximately $ billion is primarily driven by: (i) the scope evolution of the WTC Transportation Hub (“Hub”) in response to the mandate to open the National September 11 Memorial and Museum (the “Memorial”) by September 11, 2011, (ii) anticipated allowances to commercialize One World Trade Center (“1 WTC”) and the retail spaces, (iii) projects performed by the Port Authority on behalf of third‐ parties at the site (., related to the Memorial, existing subway operations, the campus security plan, and the Performing Arts Center), as well as, (iv) increases in financing and insurance expenses. .
