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How Things Work: Mechanics of 9/11 Memorial Plaza

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Images courtesy of Peter Walker Partners [Via The Architect's Newspaper.]

The dog days of summer have been slightly newsier in this August of 2K11, as the deadline for the 9/11 Memorial at the World Trade Center site approaches its deadline. We've done a site visit and drooled over every tidbit; now, A/N dives into the mechanics that make that highly-engineered memorial plaza work.

The need-to-knows:

· Designed by: Michael Arad and Peter Walker Partners, with David Brody Bond Aedas
· Not-so-deep cut: The plaza is only six feet deep because of the subway tunnels, mechanical systems, and memorial museum below grade on the site.
· Green footprint: The plaza will eventually be planted with 400 25-foot-tall trees, 215 of which will be in place for the opening, which alternate between bands of pavers and grass. The trees, grown on a farm in New Jersey, are expected to reach "60 to 80 feet in height."
· Wet stuff: The whole plaza acts as a vast stormwater collection tray, where rainwater is collected in below-ground cisterns and funneled back into the two memorial fountains.
· More TK: While Santiago Calatrava's PATH station is under construction, the 1/3 of unfinished plaza will be closed to the public.
· Not-so-humble brag: The memorial's official Twitter feed discloses that it contains "49,900 cubic yards of concrete, enough to pave more than 200 miles of NYC sidewalks."

· 9/11 MEMORIAL PLAZA: HOW IT WORKS [The Architect's Newspaper]
· 9/11 Memorial coverage [Curbed]