Construction director Steven Plate says soaring steel arches designed for the building by architect Santiago Calatrava will cost $221 million, about twice as much as estimated.
Plate says designers had to add extra steel to protect against terrorist attacks. Shipping costs also rose after planners decided to use a foreign contractor that had experience with Calatrava's designs.
Plate says the Port Authority will have to dip into a contingency fund to complete the building.
Published at 2:18 PM EST on Feb 24, 2011 | Updated at 2:57 PM EST on Feb 24, 2011