Epic in scope and globally significant, this momentous project called for 80,000 cubic yards of concrete to build the decks, walls, and enclosures of the memorial waterfalls and pools set within the footprints of the fallen Twin Towers. An additional 20,000 cubic yards of concrete was used to construct the Memorial's underground areas, including a
70-foot below-grade building that will house a museum, a train station, and other facilities.
Atop the below-grade building will sit the Memorial Plazaâ€“one of the most sustainable, green plazas ever built. In fact, the project is pursuing Gold Certification under the Leadership in Energy and Environmental Design for New Construction (LEED-NC) program, part of the U.S. Green Building Council. The Memorial is also designed to meet the requirements of New York State Executive Order 111 and the WTC Sustainable Design Guidelines.