World Trade Center (WTC) Liberty Park Living Wall
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The World Trade Center Liberty Park & Living Wall showing the the future St. Nicholas Greek Orthodox National Shrine, under construction. Video screen shot from Santiago Calatrava; Courtesy Port Authority of New York & New JerseyProject Name: World Trade Center (WTC) Liberty Park Living Wall
Year: 2016
Owner: Port Authority of New York and New Jersey
Location: New York, NY, USA
Building Type: Park
Type: Living Wall
System: Single Source Provider
Size: 3305 sq.ft.
Slope: 100%
Access: Accessible, Open to Public
Submitted by: Plant Connection

Designers/Manufacturers of Record:
Park Design & Landscape Architect: Joseph E. Brown
Developer/Construction: The Port Authority of New York and New Jersey
Greenwall System: G-O2® Living Wall, Plant Connection
Greenwall Installation: Sponzilli Landscape Group
General Contractor: TB Penick & Sons
Manufacturer & Grower: Plant Connection, Inc.
The World Trade Center Liberty Park Living Wall. Photo July 26, 2016; courtesy of Plant Connection.The World Trade Center Liberty Park Living Wall. Photo June 13, 2016; courtesy of Plant Connection.The World Trade Center Liberty Park Living Wall. Photo July 26, 2016; courtesy of Plant Connection.
Opening almost 15 years after 9/11 on June 29, 2016, the $50 million World Trade Center’s Liberty Park is an elevated, one-acre linear park (inspired by the nearby iconic High Line) built on top of a vehicular security-screening center overlooking the original footprint of the World Trade Center, now the National September 11th Memorial. Designed for the Port Authority of New York and New Jersey by landscape architect Joseph E. Brown, the park features many trees, shrubs, perennials and unique seating that provides a place for visitors to reflect, relax and recharge amidst the bustling city. Designed by Santiago Calatrava, the future St. Nicholas Greek Orthodox National Shrine surrounds Liberty Park and is a modern evolution of the Byzantine style church with a dome, still under construction. Liberty Park has a capacity of 750 people and is open to the public from 6 a.m. to 11 p.m. every day. "Liberty Park also serves as a green roof and demonstrates several other sustainable features including LED lighting plus guardrails and benches fashioned from reclaimed teakwood," (Port Authority of New York and New Jersey).

One of the park’s most striking features is the multi-hued 25 feet high and 336 feet long G-O2® Living Wall by Plant Connection that transforms the prosaic walls and garage entrances leading to the network of underground roadways and loading docks. The living wall plantings were designed in a staggered, horizontal grid to complement the 9/11 Memorial. The broad bands of color also help soften the scale and façade of the building along Liberty Street.

This notable accomplishment comes after three years of intensive planning, designing, engineering, and coordinating with a multidisciplinary team of architects, landscape architects, designers, horticulturists, engineers, and contractors. Collectively, they have transformed the site that was once the Deutsche Bank building into a meaningful and memorable space where life and greenery symbolize the rebirth of Lower Manhattan – while always remembering the past.

The Port Authority of New York and New Jersey, 2016, see below, says: "Creative vertical gardening is transforming what otherwise would be the prosaic walls of the Vehicle Security Center into green space for New Yorkers and visitors to the World Trade Center," said Pat Foye, Executive Director of the Port Authority.

And "The Living Wall provides a green space that symbolizes the resiliency of New Yorkers, the vibrancy of Lower Manhattan and its connection to the Memorial Plaza," said Steve Plate, Port Authority Chief of Major Capital Projects.
Growing in the plants at the Plant Connection nursery on April 8, 2016 for the Liberty Park Living Wall. Photo courtesy of Plant Connection.The World Trade Center Liberty Park Living Wall. Photo June 13, 2016; courtesy of Plant Connection.
The living wall is home to over 20,000 evergreen groundcovers and flowering perennials (Baltic Ivy, Common Periwinkle, Coral Bells, Japanese Spurge, and Wintercreeper) that provide year-round visual interest of color and texture, while thriving vertically in the partially shaded environment. The plants are housed in 845 stainless steel patented G-O2® Living Wall panels. An extensive 18-zone drip irrigation provides water for the living wall, while a built-in monitoring system ensures the living wall’s health. Custom stainless steel catch basins hang under the living wall panels to capture any residual water.

The Liberty Park G-O2® Living Wall, like all of Plant Connection’s G-O2® Living Walls, was pre-grown before it was installed, ensuring that the roots anchored into the panels and media before hanging vertically. Beginning in 2015, the planted panels were grown at Plant Connection’s nursery in Riverhead, NY, where they were monitored and maintained by horticulturists in an optimum greenhouse growing environment.

One retired 9/11 NYPD officer expressed their feelings after seeing the living wall coverage: "Thank you, Melissa, for your hard work, on behalf of our fallen brothers and sisters. It is nice to see that people haven't forgotten. I would love to see this before I pass. Unfortunately, the pain is still too great to go there. You are bringing such beauty to this solemn place. Again, thank you. Your work is very much appreciated."

Liberty’s Park G-O2® Living Wall offers a touch of earth amid a concrete jungle – and what better place to provide a piece of serenity and enhance the environment. The G-O2® Living Wall at Liberty Park pushes aside boundaries and invites people to come together from all walks of life to simply breathe fresh air and enjoy the newfound beauty.

"In addition to the wall, the park also features the Horse Soldier statue in honor of the troops who served in Afghanistan during Operation Enduring Freedom; a descendant of Anne Frank’s famous Horse Chestnut Tree, and more than 150 trees and shrubs. Construction of the Greek Orthodox Church continues on the park and will serve as both a church and bereavement center. The southwest corner of the park will feature the Liberty Street pedestrian bridge that crosses over West Street to Brookfield Place in Battery Park City," (The Port Authority of New York and New Jersey, 2016).

Additional thumbnail photos:

The World Trade Center Liberty Park Living Wall. Photo July 26, 2016; courtesy of Plant Connection.The World Trade Center Liberty Park & Living Wall. Video screen shot from Santiago Calatrava; Courtesy Port Authority of New York & New JerseyWTC Living Wall Final Planting Plan; Graphic by and courtesy of Plant Connection.The World Trade Center Liberty Park Living Wall. Photo July 26, 2016; courtesy of Plant Connection.The World Trade Center Liberty Park Living Wall. Photo July 26, 2016; courtesy of Plant Connection.
The World Trade Center's Liberty Park is located at 155 Cedar St, New York, NY 10006. Visit the World Trade Center website and the WTC Progress Facebook page. Watch the 5:10 video ST. NICHOLAS GREEK ORTHODOX CHURCH NEW YORK from Santiago Calatrava for a beautiful overview of the project. Watch the 2:38 World Trade Center Liberty Park Living Wall - Project of the Week 01/30/17 video from Greenroofs.com on the greenroofsTV channel on YouTube. Greenroofs.com Project of the Week 1/30/17 video photos courtesy of Plant Connection; Port Authority of New York and New Jersey, including use of Santiago Calatrava graphics; WTC Progress Facebook page; and Looking north on opening day of Liberty Street Park By Jim.henderson - Own work, CC0 1.0 Universal Public Domain Dedication on Wikimedia.

See the case studies from the
Port Authority of New York and New Jersey and Sponzilli Landscape Group. Read the August 24, 2016 Liberty Park successfully fills a critical role in the World Trade Center site by Stephen Zacks in The ArchitectsNewspaper; June 29, 2016 news G-O2® Living Wall Revealed at WTC Liberty Park from Plant Connection; June 29, 2016 World Trade Center: Lower Manhattan Gets a Living Wall…Literally by Lenis Rodrigues and Rudy King in Portfolio, The Port Authority of New York and New Jersey; June 29, 2016 See Photos of World Trade Center's Liberty Park On Its Long-Awaited Opening Day by Ameena Walker in Curbed New York; and the June 28, 2016 Touches of Whimsy at World Trade Center’s Liberty Park by David W. Dunlap in The New York Times.

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