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GREEN ROOFS ON TOP

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Courtesy Oehme, van Sweden & Associates, Inc.

Green Roofs for Healthy Cities (GRHC) presented their Green Roof and Wall Awards of Excellence at a ceremony in Chicago on Friday. Among the winners was this quilt-like green roof at the Chicago Botanic Garden by Oehme, van Sweden & Associates. The roof, which is being used for research purposes, has 300 different plant taxa in varying depths of soil. GRHC has images of all the award winners on their website, along with details on the design of each roof.



A WALK THROUGH VIA VERDE

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You may have seen our feature article on Via Verde, a housing development in the South Bronx, in our November issue. The writer Alex Ulam took the videographer Doug Forbes out to walk the site with the project’s landscape architect, Lee Weintraub, FASLA, and captured the tour.


ROOFTOP FARMING GOES MAINSTREAM

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A European honeybee (Apis mellifera) cared for by Urban Apiaries, in Philadelphia. The hives live on the roof of the SHARE Food Program in North Philly. Photo by Lauren Mandel.

A European honeybee (Apis mellifera) cared for by Urban Apiaries, in Philadelphia. The hives live on the roof of the SHARE Food Program in North Philly. Photo by Lauren Mandel.

Lauren Mandel is one of rooftop agriculture’s more ardent cheerleaders, but also one of its most helpful handicappers. Her new book, Eat Up: The Inside Scoop on Rooftop Agriculture, is a complete guide to making rooftop agriculture work at various scales, and she’s not afraid to let people know about the challenges as well as benefits. We talked with Mandel about what’s going on in rooftop ag today and how farms are showing up in the most unlikely places.

You have a landscape architecture degree from the University of Pennsylvania and you’re now working for Roofmeadow, a firm that’s known for roof gardens. How did you get from A to B?
I’ve always been interested in green roofs and rooftop agriculture, and when I went to Penn, my objective was to get really solid training in landscape architecture with the idea that I would eventually work in a slightly different industry but with a landscape architecture lens. Learning how to think like a landscape architect has been instrumental in my ability to design at multiple scales, and understand how all the parties and priorities relate to one and another. So there’s been a lot of things I’ve learned from landscape architecture that I’ve been able to apply to green design and rooftop agriculture.

I had worked for a few years in landscape architecture firms in Philadelphia and Seattle, and then again while I was in graduate school. During my last semester of graduate school, I wrote the first draft of my book; my advisors were landscape architect Karen M’Closkey, urban planner Domenic Vitiello, economist Anita Mukherjee, and Charlie Miller, the founder of Roofmeadow. I thought it was important to have these advisors because it was a very multidisciplinary subject.

There’s a real wealth of super-practical, clear-eyed advice in your book about what it takes to make rooftop agricultural viable, and you don’t sugarcoat it. What’s been the response from the community?
People have been really receptive and really appreciative of the book. One of the things I stressed is that, while I am a green designer, the book is not supposed to be my voice but the collective voice for the movement. That’s why I went to the lengths to include the voices and the leaders in the field. The book is written through a practitioner’s lens but also a journalist’s lens, and I wanted people [in the field] to speak for themselves, not just support my point.

EAT UP_ book cover Blog Why did you decide a book—as opposed to a website or other platform—would be the right way to get to your audience?
There was no comprehensive written resource on the subject; as I started researching and interviewing farmers, gardeners, designers, chefs, and volunteers, they all really wanted a resource and they didn’t have one. There’s something about having a printed resource that you could flip through—I just felt like a book was the right decision. There is an e-book as well.

The emphasis you put on understanding and influencing local policies was really interesting. Can you talk a bit about why it’s so important for rooftop farmers to become educated about policy?
Policy influences large changes, whereas individuals influence smaller changes. One of the things I do stress in the book is that innovations in policy are a very effective and quick way to make significant changes in a neighborhood or an entire city. It’s not just food policy that matters, but stormwater and zoning policy. In New York City, policy changed to make it easier for rooftop farms after the first hydroponics had to get variances. So you really need progressive building codes and zoning codes, too.

It’s so interesting to me because, as a landscape architect involved in rooftop agriculture, I no longer just coordinate with architects, clients, and engineers. I now work with policy makers, with food advocacy groups and farmers, and all these other people that I wouldn’t ordinarily get involved with.

What are some new things going on in rooftop agriculture? Any interest in commercial applications?
We’re seeing a lot of interest in agriculture retrofit—clients who already have green roofs want to know if they can turn it into a production space. There’s been a huge increase in interest in the last two years ago, especially. A few years back, when I started, no one was talking about it. Now, it’s like something’s in the water.

Where is rooftop agriculture taking off? Where is it slow to take hold?
Brooklyn is hands-down the hottest hotbed of rooftop agriculture. Besides that, there are a lot in the Boston metro area. Chicago is also real hotbed—there’s an interesting farm there on top of the city’s convention center—a perfect example of a green roof that was converted into a farm. There’s about a quarter of an acre that is in production, and the food that’s grown is used in the convention center. They’re hoping to double the size of the farm and eventually be an acre. Right now, we’re working on a rooftop farm for a school in south Philadelphia.

There isn’t as much in the South, and population density might be part of it. The only southern farm I know about is in Sarasota, Florida, and it didn’t do as well as everyone hoped it would. I don’t really know why there’s not more there. Sometimes it’s concern over hurricanes and tornados and that it’s harder to secure agriculture to the building, though we designed green roofs in hurricane-tornado zones all the time. So much is about urban patterns—if there’s a lot of vacant land, people will farm there first.

Lauren Mandel can be reached at eatupag.wordpress.com. Her book, Eat Up: The Inside Scoop on Rooftop Agriculture, is published by New Society Publishers.


LAND ARCH GETS “COOL” TREATMENT

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Shauna Gillies-Smith talks to  Cool Spaces host Stephen Chung about the Nelson Atkins Museum's landscape. Photo: Shauna Gillies-Smith

Shauna Gillies-Smith talks to Cool Spaces!  host Stephen Chung about the Nelson-Atkins Museum of Art’s landscape. Photo: Shauna Gillies-Smith

The landscape architect Shauna Gillies-Smith has worked on only a handful of episodes of Cool Spaces! The Best New Architecture, a new PBS series focused on new architecture, but she’s not worried that landscape architecture is getting the short shift. The show’s host, Stephen Chung, was a classmate of Gillies-Smith at the Harvard Graduate School of Design, and she says she is confident that he is sufficiently “interested in the allied disciplines.” The show, now premiering in local television markets, is organized around different typologies—the first few episodes have themes such as “Performance Spaces,” “Libraries,” or “Healing Spaces”—and focuses on three major new projects per episode. Although landscape architecture is not yet a featured theme, Gillies-Smith has been on screen or behind the scenes for some of the projects, and she’s a big believer in exposing the nondesign audience to design. “It’s as much an advocacy project as a beautiful interesting project about design” she says.

Gillies-Smith, who is the founding principal of ground  in Boston, is one of a team of experts whom Chung may interview on screen; the team may also include an engineer, a lighting designer, or an acoustician, depending on the project. Each expert talks about a different aspect of the project and tries to make it comprehensible to the general audience. “So, for example, I spoke on two different projects,” Gillies-Smith says. “One was the Nelson-Atkins Museum, and in that project it comes down to something very, very simple: the idea that the land was constructed.” Gillies-Smith walks the viewer through the way the landscape was shaped to accommodate a Dan Kiley garden next to the museum’s Stephen Holl addition: “The addition has a very strongly sculpted landscape that is primarily creating space so the building can poke out of the ground like a series of lanterns. A very simple idea, that the landscape was built around the buildings,”  she told us.

Gillies-Smith also worked on the episode on the Yale Health Center, which gave her the opportunity to talk about how green roofs work. “The health center has a healing garden on the roof, and the interesting aspect of that project is: What is a green roof?—explaining to the audience at large that it’s not just dirt and plants. It’s technical.” Gillies-Smith used the metaphor of a club sandwich to explain how a green roof is designed and built.

The importance of a show like Cool Spaces, Gillies-Smith says, and of having a landscape architect involved, goes far beyond the oohs and aahs of a big-time design project. She’s frank about the big picture, and how landscape architecture could have a greater share in that picture. “You need to pay attention to the big media descriptions to teach to the nondesign audience—not only the paying and nonpaying clients, but everyone—the importance in developing literacy about design. Almost every aspect of our urban experience is designed—roadways, buildings, landscapes,” she says. “In demanding, expecting, and advocating a respect for our work, there has to be an understanding that there is incredible design energy everywhere.”

The show is primarily driven by architecture projects, but Gillies-Smith hopes that it will help viewers broaden their concepts of what a designed landscape is—“not just a park or a garden or a roof with technology. Once you get beyond that level, you can start to project and advocate for a more engaging and beautiful and effective and performative landscape as well.”

Cool Spaces! The Best New Architecture is now airing on local PBS affiliates. Check your local listings for airtimes.

 


THE QUEUE, JULY 2014

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A monthly roundup of the news, dispatches, and marginalia that caught our eye.

This month’s issue of the Queue lauds the re-emergence of smart print magazines for landscape architecture,  admires a new restorative space behind bars, questions how friendly “bee-friendly” plants really are, and considers a trip to Reno…again.

 

CATCHING UP WITH…

 

FIELD STUDIES

    • Magazines are the new black! First there was Reframe, and now there’s LA+, a new print publication from PennDesign that wants to bridge the gap between trade magazines and academic journals. The aim of the publication is to provide content that is more than just “designers talking to other designers.”
    • Navigating the (policy) waters: Two recent reports from the Natural Resources Defense Council offer road maps for cities to “integrate comprehensive urban water efficiency strategies into state revolving funds and Clean Water Act compliance.”

 

OUT AND ABOUT

 

 

DISTRACT ME FROM MY DEADLINE DEPT.

 


AUGUST’S LAM HAS ARRIVED!

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Click to view slideshow.

For the cover story of LAM’s August issue, Jennifer Reut, an associate editor at the magazine, goes on safari in Louisiana with the Dredge Research Collaborative, a loosely joined group of designers and one journalist spellbound by the huge, hidden power of dredging waterways for shipping or flood control, and all of its odd side effects. It began as almost a science fiction-type pursuit, though one member of the collaborative, Tim Maly, explains, “As we began to research the present of dredge, our wild ideas were routinely falling short of reality.”  Also in this month’s features, Jonathan Lerner surveys the outsized ambitions of Joe Brown, FASLA, who just retired from AECOM, the multinational design firm to which he welded the fortunes of the beloved landscape architecture firm EDAW in an acquisition nine years ago—to applause that was scarcely universal. And on the riverfront of Newark, Jane Margolies explores the degrading past and the brighter future of an old industrial site turned into Riverfront Park, with a boardwalk done in sizzling orange, by Lee Weintraub, FASLA.

In Foreground, we have the refashioning of certain large green roofs into farms; the balancing of goodness and financial prudence required to make social-impact design viable; and the layered dynamics of marine spatial planning as practiced by Charlene LeBleu, FASLA, at Auburn University. In Species, Constance Casey writes about the respectable labors of the mole—even if it can be a gardener’s scourge. In the Back, landscape architects in Denver suggest their personal favorite spots to visit during the ASLA Annual Meeting and EXPO in November. And of course, there’s more in our regular Books and Goods columns.

You can read the full table of contents for August here. As always, you can buy this issue of Landscape Architecture Magazine at more than 200 bookstores, including many university stores and independents, as well as at Barnes & Noble. You can also buy single digital issues for only $5.25 at Zinio or order single copies of the print issue from ASLA. Annual subscriptions for LAM are a thrifty $59 for print and $44.25 for digital. Our subscription page has more information on subscription options.

Keep an eye out here on the blog, on the LAM Facebook page, and on our Twitter feed (@landarchmag), as we’ll be ungating some August pieces as the month rolls out.

Credits: Concrete Mattresses—Jennifer Reut; Orange Boardwalk—Colin Cooke Studio; Joe Brown—Kyle Jeffers; Rooftop Gardening—Chicago Botanic Garden; The Women’s Opportunity Center—Bruce Engel, Sharon Davis Design; Marine Spatial Planning—Charlene LeBleu, FASLA; Mole—www.shutterstock.com/Marcin Pawinski; 9th Street Historic Park—Kyle Huninghake; Marché aux poulets—Camille Sitte, circa 1885.

ROOF TO TABLE

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BY LAUREN MANDEL, ASSOCIATE ASLA

Ryerson University's green roof transformation.

Ryerson University’s green roof transformation.

From the August 2014 issue of Landscape Architecture Magazine.

In downtown Chicago, the city’s convention center, McCormick Place, dominates the landscape with 27 acres of rooftop. The facility’s West Building has more than three acres of thin, or extensive, green roof, which was installed in 2007 to meet city requirements. In recent years, a lack of maintenance has caused the roof’s Sedum species to decline, which gave employees of SAVOR, the in-house food service provider at McCormick Place, an idea that these highly visible vegetated planes could be used for a more productive purpose. The result is the McCormick Place Rooftop Farm.

Green roof infrastructure has matured to the point that the intended use for some older roofs may no longer be relevant. In Chicago, New York, and Toronto, there are projects to turn some of these roofs into fields of food. In the past decade, cities with progressive stormwater management policies have incentivized or even required green roofs on new construction, creating a veneer of vegetation across many urban skylines. But as with any landscape, the project matures and the needs of the users change.

Detailed sections of Ryerson University's Rooftop Farm, before and after.

Before and after detailed sections of Ryerson University’s Rooftop Farm.

In 2013, a partnership between SAVOR and Windy City Harvest—an urban agriculture program run by the Chicago Botanic Garden—began to replace 20,000 square feet (half an acre) of McCormick Place’s Sedum with rows of colorful vegetable starts. The farm’s drip-irrigated nightshades, leafy greens, and shallow root crops are now harvested and sold to SAVOR at a low cost for use in the convention center. Angela Mason, the director of urban agriculture programs for the Chicago Botanic Garden, says SAVOR “gets truly local food.” The rooftop farm also serves as a job training site. The farm coordinator, Darius Jones, estimates that the 2014 season will yield 18,000 pounds of produce for convention center guests.

A team in New York City has begun repurposing the rooftop of the Staten Island Ferry Terminal in St. George, Staten Island. The building’s extensive green roof was installed in 2005 and suffered from a dwindling maintenance budget, a defunct irrigation system, and a takeover by volunteer species. Adrian Wilton, the project’s director, from the New York-based edible landscape company Living Restoration, LLC, says that funding from the Staten Island Borough President’s Office enabled the initial conversion of 1,200 square feet of green roof into vegetable beds. Volunteers pulled weeds and added soil to increase the growth media from five inches to between seven and eight inches. Living Restoration plans to convert additional acreage to bring 9,000 square feet, about one-fifth of an acre, into production of leafy greens and Brassica for local food pantries. “It’s a great way to educate everyone about uses for green roofs,” Wilton says.

The Ryerson University Rooftop Farm and its squash bloom.

The Ryerson University Rooftop Farm and its squash bloom.

In Toronto, the extensive green roof on Ryerson University’s George Vari Engineering and Computing Centre was installed in 2004 to moderate indoor temperature, manage stormwater, and give students a living research platform. The roof, six inches thick, originally was planted with widely spaced daylilies (Hemerocallis spp.) and became a veritable blank slate where more than 30 volunteer species, including trees, took root. Nine years later, the university’s edible gardening group, Rye’s HomeGrown, converted a small test plot into edible plants and is currently converting additional acreage for a total of 11,000 square feet, or about a quarter acre. Students, faculty, and volunteers cut vegetation, laid tarps for several weeks to kill remaining root systems, spread two inches of compost, and installed a drip irrigation system. The 2013 season produced 500 pounds of nightshades, cucurbits (squash, melons, etc.), leafy greens, and herbs. Rye’s HomeGrown anticipates 7,500 pounds during the 2014 season. The roof-fresh produce is eaten within the school’s cafeteria and sold to a local farmers’ market and patrons of community-supported agriculture.

Cities are increasingly adopting progressive stormwater policies, and the uses for existing green roofs are changing. Designers will need to understand the technical considerations of skyline retrofits. To convert ornamental green roofs to agricultural roofs, they’ll have to consider loads, fall protection (i.e., guardrails or sufficiently tall parapets), waterproofing membrane protection, and performance of long-term growth media. Some of these considerations require structural and architectural coordination. Early conversations with rooftop farmers should revolve around the growth media and nutrients. It’s important that the growth media remain “structurally stable” over time, meaning it’s designed with few small particles, which can cause compaction, and little organic matter, which can break down and also cause compaction. When supplementing an existing green roof with agricultural media, it’s best to include slightly more organic matter than traditional green roofs have and develop a lightweight nutrient addition strategy (think compost tea) with the farmer. Be sure the farmer also understands which tools may be used to avoid puncturing the waterproofing membrane or, better yet, include a shovel guard toward the base of the system if the budget allows.

Lauren Mandel, Associate ASLA, is a project manager and rooftop agriculture specialist at the Philadelphia-based green roof firm Roofmeadow and the author of Eat Up: The Inside Scoop on Rooftop Agriculture (New Society Publishers, 2013). Learn more at eatupag.com.

Credit: Pictures of Ryerson University’s Rooftop Farm: Vincent Javet, Affiliate ASLA, Green Roofs for Healthy Cities; Ryerson University’s Rooftop Farm sections: Lauren Mandel, Associate ASLA.


D.C. IS TURNING GREEN ON TOP

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After 10 years of evolution, the green roof of the American Society of Landscape Architects is producing a new and varied crop. Photo courtesy of the American Society of Landscape Architects.

After 10 years of evolution, the green roof of the American Society of Landscape Architects is producing a new and varied crop.

We recently came across this piece by Brittany Patterson at E&E Publishing on green roofs in the nation’s capital and their enormous (and necessary) benefits, which was originally published behind E&E’s paywall. E&E, which does excellent daily reporting on climate change and energy issues, has kindly allowed us to repost the article in full.

 

NATION’S CAPITAL BECOMES GREEN ROOF CAPITAL TO FIGHT EXTREME HEAT, HEAVY STORMS

BRITTANY PATTERSON, E&E PUBLISHING, LLC, JUNE 9, 2015

Nestled on Eye Street in downtown Washington, D.C., near the heart of the bustling city lies the headquarters of the American Society of Landscape Architects (ASLA).

From the front, the brick building looks like any other in the neighborhood, but take the elevator and a flight of stairs to the roof and you’ll find yourself surrounded by rows of green Sedum, blooming prickly pear cactus, and patches of lush butterfly milkweed and hare’s-foot clover. It’s almost possible to imagine you are sitting in the tranquil countryside, not just on the roof of a building covered in foliage.

As relaxing as they can be, green roofs are more than just easy on the eyes.

“Green roofs deliver multiple benefits for both combating heat and in the retention of stormwater,” said Kate Johnson, a program analyst with the District Department of the Environment (DDOE). “Both are issues we think are going to continue to be important in light of climate change. It’s projected to get hotter, and it’s projected we’ll have more extreme rain events.”

BEDIT_2015_PR_WLAM-2015-ASLA-Green-Roof-029

ASLA’s green roof captured 75 percent of the 29 inches of rain between July and May of 2007.

Now in its 10th growing season, ASLA’s green roof has weathered it all and has provided an immense amount of data on the environmental impacts of a leafy building canopy.

The data—the roof caught nearly 75 percent of 29 inches of rain that fell between July and May of 2007 and was as much as 32 degrees cooler than black roofs in the neighborhood—is consistent with benefits observed around the world.

As cities search for climate change mitigation strategies, green roofs have emerged as a way to chill an urban area’s core temperature, collect stormwater, clean up local air pollution, and reduce a building’s energy needs for a relatively small cost.

Stormwater regulations help spur boom

Last month, a survey released by the group Green Roofs for Healthy Cities found that the nation’s capital leads North America in green roof installations, with 1.2 million square feet installed in 2014.

In the early 2000s, through partnerships with a number of nonprofits and community groups, the district began offering subsidies for the cost of green roof installations through a program called RiverSmart Rooftops. The 2014–2015 program, which is being administered by the Maryland-based Anacostia Watershed Society, is offering $10 per square foot on properties of any kind, including residential, commercial, and institutional ones, and of all sizes. In some areas, up to $15 per square foot is an option.

The current program is set to run for three years. Based on past demand, DDOE allocated $100,000 in grant money per year, but program manager Stephen Reiling said the program isn’t even through the first year, and already money is being added to the budget.

“The demand’s been much higher,” he said.

The flurry of activity can partly be attributed to new stormwater regulations passed by the district in 2013, under which all new buildings constructed in the downtown area must retain the first 1.2 inches of rainwater.

“Especially downtown with dense development, it can be hard for developers to meet that,” he said. “Green roofs have become one of the best ways given the limited space.”

But aside from new regulations, Reiling said it appears there is an increasing interest in green roofs. DDOE doesn’t typically give rebate dollars to new developers in the downtown area that fall under these new restrictions. Instead, it’s targeting those who are retrofitting. The traditional roof has a life span between 20 and 30 years, and the idea is to “catch people in that sweet spot where they want to install a new roof,” he said. As an added bonus, studies have found green roofs have a life span closer to 40 years.

RiverSmart Rooftops is administered through DDOE’s Watershed Protection Division, which means the program’s mission is to help to reduce stormwater runoff, a problem that D.C. and many other older cities battle. As cities expand, more surface area is covered in impervious materials like roads, parking lots, or buildings that prevent water from being absorbed into the ground. In the parts of the district where the pipes are designed to carry both stormwater and sewage to the treatment plant, the overflow pours into Rock Creek and the Potomac and Anacostia rivers.

Most storms in the D.C. region unleash between 1 and 2 inches of rain, and 4-inch green roofs, the most commonly constructed thickness, are designed to catch just that amount.

“On our end, in the branch where I’m at, we’re looking at green roofs for stormwater control, volume reductions, and water quality,” Reiling said. “There are habitat and urban heat island effect benefits, as well.”

Offsetting the need for power plants

Cities are an appropriate target for green roofs partly because of the urban heat island effect, which can threaten lives during hot periods. The effect occurs when dark areas like black asphalt prevalent in cities absorb large amounts of heat.

According to a recent study commissioned by DDOE assessing the health impacts of different urban heat island reduction strategies, a 10 percent increase in vegetative cover can reduce mortality during heat events by 7 percent. Between 1948 and 2011, an average of 285 people died of heat-related causes in Washington, D.C. More vegetative cover could save approximately 20 lives per decade, the study found.

Green roofs also trap particulate matter, which can have a positive effect on regional air pollution levels. But the easiest way to sell green roofs to building owners and developers may be to cite their energy cost savings. Local climate dictates how big the cost savings will be, but in general, when green roofs are wet, they absorb and store large amounts of heat. When dry, green roof layers act as an insulator, decreasing the flow of heat through the roof, thereby reducing the amount of air-conditioning needed to keep the inside cool.

One study in central Florida measured year-round energy savings from a green roof on a 3,300-square-foot building. By the roof’s second summer, the average rate of heat absorbed through the green roof was more than 40 percent less than for an adjacent building’s light-colored roof. That reduction was estimated to lower summertime energy use by approximately 2 kilowatt-hours per day. Under winter heating conditions, the amount of heat transferred into the building was almost 50 percent less for the green roof than for the conventional roof.

“By saving energy, green roofs can help reduce emissions by offsetting the need for power plants, one of the biggest sources of particulates,” Johnson said.

Seeing greenbacks in green roofs

Green roofs also are having an economic ripple effect. Emory Knoll Farms owner Ed Snodgrass, for example, has farmed many different commodities over the course of his lifetime, from dairy cows to corn to soybeans. Nothing has done so well for him as what he cultivates now at his Maryland business—plants specifically designed for green roofs.

Today, Snodgrass has 10 employees on the payroll, and over 15 years, he has facilitated the installation of more than 1,400 green roofs covering more than 7.6 million square feet.

He said the general acceptance for green roofs has increased, in part due to increased stormwater regulations. Surprisingly, the very people who were once skeptical are one of the driving forces.

“In the beginning, I had roofers saying, ‘I spent my career getting water off of roofs; now you want me to keep it on,'” Snodgrass said. “Now, they’re the biggest advocates.”

The easiest candidates for the installation of green roofs are new buildings belonging to institutions that intend to occupy the space for an extended period of time, like schools, government buildings, and hotels.

The process for installing a green roof is fairly simple. Once a roof is structurally sound enough to carry the extra weight from the soil and plants of a green roof, it’s insulated and waterproofed, and a layer of water-absorbing material is added. That is followed by drainage and filtering mechanisms and soil and plants.

In addition to installing green roofs, the nursery stocks more than 100 varieties of green roof plants including Sedum, ground covers, herbaceous perennials, and grasses, specially designed to thrive in shallow and water-extreme conditions.

“These plants have to be real survivors,” he said.

The whole roof works together as a system, Snodgrass said, and as a result, its benefits come in aggregate, not from a single aspect of the roof.

“They catch stormwater, reduce energy costs of the building, extend the life of the roof’s waterproofing membrane because they protect it from sunlight, they’re nice to look at and an ecosystem for pollinators,” he said.

Not every roof can go green, however. The standard 4-inch green roof adds between 25 and 30 pounds of weight per square foot, and some roofs cannot be engineered to handle the stress.

They’re also expensive, costing anywhere between $10 and $30 a foot to install, as opposed to between $5 and $7 for the typical shingle roof.

Reiling at the DDOE said he thinks the price will fall once more people adopt green roofs.

“At some point, it’s going to become standard practice, and we’ll stop incentivizing it,” he said.

Copyright 2015, E&E Publishing, LLC. This article was reprinted from ClimateWire with permission of E&E Publishing, LLC, www.eenews.net.



SPEAKING OF FREEDOM: LAM’S ON US

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Click to view slideshow.

July’s LAM looks at the long-needed rehabilitation of Babi Yar Park, a memorial ground in Denver dedicated to the lives lost in Kiev, Ukraine, during the Holocaust, by Tina Bishop of Mundus Bishop; a rethinking of Chavis Park in Raleigh, North Carolina, by Skeo Solutions, which embraces the park’s African American heritage through public engagement; and the ground-to-crown planting of the One Central Park high-rise in Sydney, designed by Ateliers Jean Nouvel, with Aspect | Oculus and Jeppe Aagaard Andersen, where sprawling green balconies make what is said to be the tallest vertical garden in the world.

In this month’s departments, the Milan Expo 2015 centered on food sustainability seems to draw controversy from every angle; Molly Meyer is leading the charge for affordable, simpler, and greater biodiversity in green roofs; and nature reclaims lands once lost from the demolition of two dams on the Elwha River in Washington State. In The Back, an exhibit at the Smithsonian National Museum of Natural History immerses visitors in the beauty of Iceland through sight and sound. All this plus our regular Now, Species, Goods, and Books columns.

You can read the full table of contents for July 2015 or pick up a free digital issue of the July LAM here and share it with your clients, colleagues, and friends. As always, you can buy this issue of Landscape Architecture Magazine at more than 200 bookstores, including many university stores and independents, as well as at Barnes & Noble. You can also buy single digital issues for only $5.25 at Zinio or order single copies of the print issue from ASLA. Annual subscriptions for LAM are a thrifty $59 for print and $44.25 for digital. Our subscription page has more information on subscription options.

Keep an eye out here on the blog, on the LAM Facebook page, and on our Twitter feed (@landarchmag), as we’ll be ungating July articles as the month rolls out.

Credits: “The Global Cucumber,” Tim Waterman; “Green Roof Gold,” Michael Skiba; “A River Returns,” National Park Service; “Star Witness,” © Scott Dressel-Martin; “The Chavis Conversion,” Skeo Solutions; “Live It Up,” Simon Wood Photography; “Songs of Ice and Fire,” Feo Pitcairn Fine Art.


THE GLOBAL CUCUMBER

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BY TIM WATERMAN

The Milan Expo 2015 raises unsought emotions about food, cities, the world.

The Milan Expo 2015 raises unsought emotions about food, cities, the world.

From the July 2015 issue of Landscape Architecture Magazine.

A city like Milan reflects the strivings of generations. It has a rich quality of everyday life that includes a sophisticated food culture, which, as in so many Italian cities, is both distinctly local and, because of its history of trade, cosmopolitan. The evolution of the city’s form has intertwined with the tastes and appetites of the Milanese. The convivial quality of many of its spaces comes from enclosures such as its ubiquitous courtyard gardens, its cool semiprivate zones where neighbors come into contact, or its sidewalk cafés. Milan was once Mediolanum (meaning “in the midst of the plain”), the capital of the Western Roman Empire. It was enclosed by walls, but open to its countryside in the Po River Valley, where alluvial soils raised abundant grain and grapes, and roads brought influence from all over Europe.

Milan’s economy has suffered, as has all of Italy’s, from the crash in 2008, and recession and unemployment are tenaciously rooted. While its economy continues to be underpinned by industry and agriculture, notably by small, family-owned farms, government policy has looked to urban and infrastructural development for solutions to the crisis. Italy’s new, post-Berlusconi government is trying to show evidence of its ability to deliver, and Milan, the financial center of Italy, has become a showcase of contemporary neoliberal development. In particular, two developments have shown great international visibility: the Milan Expo 2015 and the business district at Porta Nuova, best known for the Bosco Verticale (vertical forest), the heavily vegetated and much-published twin luxury apartment towers by the architect Stefano Boeri.

Boeri has courted controversy at both sites, attracting antigentrification protests both from the working-class neighborhood the towers protrude from, as well as accusations of deploying expensive greenwash that would never be possible in a lower-cost development. Much the same objections have been raised against the plans for this year’s expo in Milan, which he master planned with Jacques Herzog, William McDonough, and Ricky Burdett. “Feeding the Planet, Energy for Life” is the expo’s motto, meant, as it was, to embody a sustainable ethic, but it clashed with the presence of food giants such as McDonald’s and Coca-Cola among the nations represented. Lavish spending on the project further excited anger, as many people questioned the concentration of municipal spending on one site instead of many, and the inevitable siphoning away of funds that such concentration engenders. On May Day in Milan, cars blazed in the streets, windows were smashed, and ‘No Expo’ graffiti proliferated.

In this case, radical protesters have shown a conservative attitude toward public spending. Such stubbornness can also be found in Italy’s culinary and agricultural traditions. Like Milan’s urban fabric, these traditions reflect the strivings of generations: make-do-and-mend and waste-not-want-not methods ensure the sustainability of these traditional practices. Frugality is a fruitful practice, and thus the delights of the Italian table are legendary. Italy’s food culture provides the perfect platform to present good food practice to the world. This was the starting point for the master planning team, who wished to create a very different type of expo, mixing a necessary message in with all the usual flash of a multimedia, multi-nation consumerist extravaganza.

I spoke in London with Burdett, who told me the original intention was that 50 percent of each expo plot should be given over to green open space, which meant that the whole would have been landscape-driven rather than focused on pavilions. Drawings from the 2009 proposal show delicate fabric awnings, fields of sunflowers, and canals. This much calm sincerity was, perhaps, doomed from the beginning, and all the partners on the master planning team except Boeri disowned the process and left the team when the requirement for green space was abandoned by the organizers.

The parts of the master plan that have survived are based in classical Roman city plans or plans of military camps. The site is bounded, in like military or urban style, by fences, guards, gates, and canals, and it is organized on a grid with two primary axes: the cardo, or north–south axis, and the decumano, the east–west axis. Tentlike canopies, other survivors from the original master plan, float above.

The expo involved spending on major new highway, rail, and subway infrastructure and interchanges, enough for a permanent new city quarter, which now seems unlikely to be built in the near future. No developer has yet been found for the site, which is located on Milan’s western edge immediately adjacent to one of Europe’s largest convention centers, Fiera Milano. The area is typical urban fringe, a loose agglomeration of industrial uses, working-class neighborhoods, and strip development, all studded with islands of remnant agricultural land. Reports of scandals and boondoggles were rife, as all the usual problems with corruption, profiteering, and inflated land prices, along with a now-familiar story of worker exploitation and poor working conditions, unfolded. The growing cost of the event forced the organizers to search for more corporate sponsors, which included McDonald’s and Coca-Cola, as well as the confectioners Lindt and Ferrero Rocher. Their presence is “perverse and bizarre,” Burdett says.

This familiar mix of corporate influence and official and private corruption angered not just those who demanded satisfaction in Milan’s streets, but also workers at the expo who have a keen sense of the politics (“In Italy, politics is everything,” says Burdett.). I toured the children’s area, which was filled with installations for interactive play designed to teach children about plants, food, and environmental responsibility. It was the end of the day, and there was a handful of children left. Many of the workers were gathered together and winding down. Among them was Stefano Bisi, who is scandalized by the presence of the food giants and convinced that “the only people who will gain are the big firms and those who poured the concrete.” Against a backdrop of giant multicolored fruit and vegetables, he warns me that we must “beware of the global cucumber.” Naturally, I’m mystified by this, and he explains by acting it out—he presses his back flush to a wall—“we have to guard our behinds from the global cucumber.”

There are some moments of real beauty, and pavilions that have kept to the original idea of 50 percent green space. These pavilions are without a doubt the most successful. Austria and the United Kingdom are the big showstoppers. Austria provides a steadily misted and cool, wooded undercroft. As the path climbs into the pavilion through trees, a neon sign which reads “breathe” comes to read “eat.” The UK Pavilion by the evocatively named Wolfgang Buttress and BDP is hardly a building at all, but rather a swarm of steel members hovering over a wildflower meadow humming with bees. Everywhere else, plants are growing on green walls at wild angles, as at Israel’s pavilion, or even upside down in a number of pavilions where any number of technocontraptions are employed in horticulture. It’s a relief to see plants growing happily, right-side up, in soil.

The USA Pavilion is presented with our usual national swagger, second only in height to the Italian pavilion, and with great technopomp, a massive lighted sign at its entrance announces the dawning of the new age of “American Food 2.0.” This means that plants are grown both sideways and upside down, and that an enormous living wall encrusted with lettuces undulates rhythmically from stem to stern, apparently (avowedly) to evoke the vaunted national image of “amber waves of grain.” Not even your patriotism can overcome such leaden high concept and overzealous technophilia, though they’re certainly appropriate to the expo format. The Belgians, punching above their weight, also bring high-tech farming that looks like the inside of a laboratory, and the Ikea-like, serpentine circulation system through it spits us out into a wonderland of costly chocolates, beer, and pommes frites.

Some countries get the point of an expo but not of the foodie theme. Brazil has a bouncy climbing structure, while Russia’s mirrored, cantilevered erection is, says Burdett, “something an oligarch would build.” And, of course, a glib comparison to the global cucumber is apropos. The centerpiece of the whole exhibition, located at the south end of the cardo, next to the vast, white Italian pavilion, is the Tree of Life, designed by the event entrepreneur Marco Balich, and the focus for a fountain and multimedia light show every night of the expo. Like the “supertrees” at Singapore’s Gardens by the Bay, the form is the shape of a vortex like a tornado or a whirlpool, or perhaps the bell of a horn. (To describe the shape, an old friend suggests it might be called “vuvuzeliform,” in reference to vuvuzela, the stadium horn made famous by the 2010 soccer World Cup in South Africa.) Since the conflation of tree and vortex in Singapore, it’s become possible to see this “vuvuzeliform” as invoking the symbology of the tree of life, though this is an uncomfortable pairing, given that the tree of life is so often depicted with roots equivalent to its canopy. Rooted in the ground, reaching to the sky, a reflection of the cycle of life. The vortex/tree form appears everywhere at the Milan Expo, but it’s rootless.

Tim Waterman teaches at the Writtle School of Design in Essex and at the Bartlett in London. He is the author of two textbooks on landscape architecture, and he travels and speaks widely.

As always, you can buy this issue of Landscape Architecture Magazine at more than 200 bookstores, including many university stores and independents, as well as at Barnes & Noble. You can also buy single digital issues for only $5.25 at Zinio or order single copies of the print issue from ASLA. Annual subscriptions for LAM are a thrifty $59 for print and $44.25 for digital. Our subscription page has more information on subscription options.


AUGUST’S LAM: SUPER SOAK

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Click to view slideshow.

In August’s issue of LAM, Philip Walsh finds that landscape architects could work harder than they do to restore lost wetlands in the United States. Steven Litt, in Cleveland, reports on how Perk Park, an acre of oasis downtown, by Thomas Balsley Associates, is making the city look harder at the value of well-designed open space. And in Washington, D.C., Bradford McKee checks out the new national headquarters of the U.S. Coast Guard with two dozen acres of green roofs and gardens by Andropogon and HOK.

In the departments, the Harvard Graduate School of Design appoints Anita Berrizbeitia, ASLA, as the chair of landscape architecture and Diane Davis as the chair of urban planning; a look at the watchdogs who track down plant growers who infringe on someone else’s patents; and the winners of the Boston Living with Water Competition aimed at envisioning a resilient city come sea-level rise. All this plus our regular Now, Species, Goods, and Books columns. The full table of contents for August can be found here.

As always, you can buy this issue of Landscape Architecture Magazine at more than 200 bookstores, including many university stores and independents, as well as at Barnes & Noble. You can also buy single digital issues for only $5.25 at Zinio or order single copies of the print issue from ASLA. Annual subscriptions for LAM are a thrifty $59 for print and $44.25 for digital. Our subscription page has more information on subscription options.

Keep an eye out here on the blog, on the LAM Facebook page, and on our Twitter feed (@landarchmag), as we’ll be ungating August articles as the month rolls out.

Credits: “The Return of the Swamp,” Lisa Cowan, ASLA/StudioVerde; “Freeze, Thaw, Flourish,” © Scott Pease/Pease Photography, 2012; “The Wetter, the Better,” Judy Davis/Hoachlander Davis Photography; “New Chairs, Subtle Shifts,” Courtesy Harvard Graduate School of Design; “Plant Sheriff,” Courtesy Bailey Nurseries; “Boston from the Ground Floor,” Designed by Architerra; Courtesy Boston Living With Water.


GREEN ROOF GOLD

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BY LAUREN MANDEL, ASLA

Molly Meyer is capitalizing on a surge in demand.

Molly Meyer is capitalizing on a surge in demand.

From the July 2015 issue of Landscape Architecture Magazine.

Molly Meyer, a Stanford University-trained biogeochemist and the CEO of Omni Ecosystems and Rooftop Green Works in Chicago, is part of the green roof industry’s emerging generation of innovators. Meyer’s approach to green roof design emphasizes affordability and simplicity, with the goal of maximizing biodiversity. Through her sister companies, Meyer sells and installs a specially designed green roof tray system that supports unusually diverse plant species in shallow growing medium, most notably in veneer meadows. Meyer recently cofounded a third company, the Roof Crop, which began cultivating its first rooftop farm in April.

You’re from Indianapolis, which is a fairly large city. What drew you into soil science?

I loved playing outdoors as a kid. By the time I got to college I was looking for opportunities to do schoolwork outdoors. There were a lot of classes and research opportunities [for which] I could work outside and travel for by doing soils projects. I really loved that.

I did a number of field classes, and there were two big field projects that I worked on. One was researching arsenic contamination of groundwater in Cambodia, which actually had a geologic source. Another project that I worked on was looking at soil phosphorus levels in agricultural soils in Hawaii. I went to Hawaii three times and Cambodia three times in college for field expeditions.

You’re quite entrepreneurial, though most of your training is in science rather than in business. How did you connect these interests?

My father was in business, and my two grandfathers also had owned businesses. So I grew up talking about business around the dinner table a lot with my family. That definitely shaped my worldview, and it’s how I approach problems.

As a kid I was not at all interested in going into business. I actually thought it looked really boring. But as an adult I found it’s actually really interesting to see how we can solve problems through business, through capitalism, and using that as a lens through which to look at environmental issues, and in turn provide solutions for long-term environmental issues. I definitely did a big 180 on that and came to really appreciate what I’ve learned from my dad and grandfathers.

Can you talk about your sister company, the Roof Crop?

I’m a cofounder, and at the Roof Crop we will farm any Omni Ecosystems green roof, and we will lease it from a building owner. In the city of Chicago, green roofs are more or less required under the city’s sustainable development policy for new construction. What that means is that developers and building owners can meet this city of Chicago requirement, while also then leasing the roof space and paying off the cost of that green roof in less than 10 years.

We’re really excited about seeing what this can do for the financial aspects of green roofs. Also creating jobs, and creating more sources for local food in the city. We have a crew on staff—of mostly college students—that farms these roofs.

What are you working on now?

Well, we just completed a green roof on the West Loop that’s a rooftop farm. It’s about 10,000 square feet, and it’s right now got a bunch of things sprouting up. Things are really starting to grow. We seeded in just a few weeks ago, and we put in a few plugs. I think we’re going to have some crops to harvest in the next two to three weeks here. We’re really excited about that. We’re going to be able to really see where our model’s been suggested in terms of payback period on the roof because we’re going to finally be at a large scale.

One project that I’m really excited about is a meadow that we’re still working on, on the Keep Indianapolis Beautiful roof. That one is three inches deep, about 15 pounds per square foot, and 85 percent native. Which is remarkable.

It’s grasses and perennials, right?

Predominantly, yeah. On that roof we also have an energy study taking place. We have been monitoring the temperature of the roof membrane and various parts of the green roof profile over the past year, and we’re continuing to do so. We’re also looking at the energy usage data from before the green roof went on, and now after the green roof has been on, and comparing that to see how much energy can be saved due to a green roof when that’s the only change they’re building it for.

Are there any other studies that have been done that compare the performance of a bare membrane and vegetative roof on a single building?

Not to my knowledge—[not one] that doesn’t have any other change like that. I’m familiar with Chicago City Hall [Editor’s note: The interviewer’s employer, Roofmeadow, provided technical design services, construction review, and a long-term warranty for that project.], for example. My understanding of that project is they also added insulation to the roofs, so that isn’t exactly comparable. That green roof had an energy study on it. I don’t know of any other study to the scale that the Keep Indianapolis Beautiful one’s done on.

How is your work affected by climate change?

It’s a really good question. We are providing these various ecosystems in urban areas, and they’re fixed in location so that they can’t move with extreme climate events like other ecosystems—through the eons glaciers have moved, and extreme events have occurred. We have to create a fixed ecosystem, which has very, very limited resources. There’s a shallow rooting depth, a limited amount of water. Those things really impact what we’re trying to do, but we still have extremes of temperature and moisture that have to be managed in these fixed conditions. I think that’s one thing that’s tricky about climate change. We’re seeing more and more extreme events, but we still have the same fixed conditions that we get to work with in the built environment.

Would you say that green roofs are less adaptable ecosystems than an ordinary ecosystem on the ground?

Well, I hesitate to say that because so many of our ecosystems on the ground now are man-made. Inherently, a green roof is an isolated ecosystem. It’s an ecosystem that we’re trying to create on a place where nothing is suitable for life. What’s native to a TPO [thermoplastic polyolefin] roof membrane? There isn’t anything, and so I think that makes it tricky.

On the other hand, I think climate change is affecting our work because people are starting to talk about it more. Recently, President Obama gave a commencement address and talked about how critical climate [change] is going to be to us and the next generation, and how immediate action is fundamental. It has to happen. I think that sort of conversation starts to happen more and more, and at a higher level, at a leadership level. Then it can actually open up opportunities for green roofs on more buildings, because it becomes part of the way people think about their impact on the earth, and how we’re all going to be adapting our environment to climate change.

What is on the horizon that’s exciting?

I’m really excited right now about a few different areas. I’m really excited about green roofs that can be farmed. I think rooftop agriculture is going to get more commonplace, and it’s going to be one of the factors that make green roofs financially viable. I’m also really excited about getting better understanding of how green roofs impact energy usage in buildings. I think the science on that is improving.

I’m also really excited about seeing what happens with increasing biodiversity on green roofs. When green roofs are just focused on one genus of plant, like Sedum, it really creates a narrow sliver of habitat, with stopping places for migratory birds, and butterflies, and whatnot. But with meadow systems, they are packed with diversity. I think that we’ll see a lot more opportunities for connecting habitats and creating way stations for migratory species.

Lauren Mandel, ASLA, is a project manager and designer at the Philadelphia-based green roof firm Roofmeadow and the author of EAT UP: The Inside Scoop on Rooftop Agriculture (New Society Publishers, 2013). She blogs about rooftop agriculture at eatupag.com.

As always, you can buy this issue of Landscape Architecture Magazine at more than 200 bookstores, including many university stores and independents, as well as at Barnes & Noble. You can also buy single digital issues for only $5.25 at Zinio or order single copies of the print issue from ASLA. Annual subscriptions for LAM are a thrifty $59 for print and $44.25 for digital. Our subscription page has more information on subscription options.


ART DIRECTOR’S CUT, AUGUST 20

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The things our art director, Chris McGee, hated to leave out of the current issue of LAM.

xxx. Credit: xxx.

There are 12 acres of green roofs and 13 acres of wet native gardens incorporated into the design of the U.S. Coast Guard headquarters. Credit: Taylor Lednum/GSA.

From “The Wetter, the Better” by Bradford McKee, in the August 2015 issue, featuring the new landscape by Andropogon and HOK at the U.S. Coast Guard headquarters.

“The explosion of yellow in the middle ground punctures the smoky gray tones of the building and sky beyond.”

—Chris McGee, LAM Art Director

As always, you can buy this issue of Landscape Architecture Magazine at more than 200 bookstores, including many university stores and independents, as well as at Barnes & Noble. You can also buy single digital issues for only $5.25 at Zinio or order single copies of the print issue from ASLA. Annual subscriptions for LAM are a thrifty $59 for print and $44.25 for digital. Our subscription page has more information on subscription options.


THE WILD GRID

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BY GARY HILDERBRAND, FASLA

Dan Kiley's South Garden at the Art Institute of Chicago has seasoned over nearly 50 years into a rugged, magical hawthorn canopy.

Dan Kiley’s South Garden at the Art Institute of Chicago has seasoned over nearly 50 years into a rugged, magical hawthorn canopy.

From the October 2015 issue of Landscape Architecture Magazine.

There is nothing quite like sitting beneath the almost fully connective canopy of 50-year-old cockspur hawthorns in Dan Kiley’s South Garden at the Art Institute of Chicago in early summer. The 32 trees at the center of the garden, set in a 20-foot grid, reached their natural maximum height long ago. Their wily trunks have thickened and twisted with age; their craggy, wandering branches continued to elongate, eventually overlapping and intertwining, creating a space that has a level of repose perhaps unequaled in a midcentury urban landscape space. Crataegus crus-galli has narrow, waxy, obovate leaves, which are naturally held upright at the tops of the branches, suggesting intolerance for shade; they filter a kaleidoscope of sunlight and shadow onto the warm brown crushed-stone paving below. Reflections from the water surface and gravel color the air. Though generally I find the modernist conceit of describing “rooms” in landscapes inadequate or ill-suited, this canopy explicitly creates a ceiling and produces a dazzling sense of interiority within the garden’s sunken court space. It’s hard to believe you are sitting within 150 feet of Chicago’s main drag.

Michigan Avenue, the historic eastern anchor of Chicago’s exalted grid, attracts hordes of traffic and tourists to its institutions, architectural sites, and parks. There are excellent urban landscapes to see here, including the Lurie Garden, Maggie Daley Park, Grant Park, and the grounds of the Field Museum. None is more tranquil than the South Garden. Peter Schaudt, one of Chicago’s most admired landscape architects, considered it Chicago’s best landscape space. This year, ASLA conferred its Landmark Award to the project, which recognizes works between 15 and 50 years old that retain their design integrity and benefit to the public realm. At about its 50-year mark, the South Garden more than deserves the recognition, and it’s an occasion to revisit some of the particular qualities that distinguish this space among midcentury modernist urban gardens and Kiley’s own body of work.

The original Art Institute building fronts on Michigan Avenue between East Monroe Street and East Jackson Drive and bridges over the tracks of the Metra Electric and the South Shore lines. The Art Institute invited Kiley to design the project in 1963 alongside the new Morton Wing, which completed new gallery space for the museum to the south of its main lobby. The Morton’s long mass landed in a north–south direction, parallel with the rail tracks, effectively using the building as a buffer from the trains and restoring approximate symmetry to the institute’s Michigan Avenue front by matching an earlier wing on the museum’s north side. A new subterranean parking garage was to be placed between the Morton and Michigan Avenue. The project brief mandated the garden as a rooftop sanctuary.

A sanctuary it is. On a recent visit, I was reminded that the garden is one of those design triumphs where formidable constraints are turned into ingenious assets. It contains details and material conditions that I almost never like: raised planters (which always denote a lack of sufficient provision for soil at grade); court space that’s sunk below street level (famously railed against by William H. Whyte and a generation of followers); and vines climbing tree trunks (usually considered detrimental to tree health). But Kiley’s raised planters and sunken space here combine as the garden’s tour de force, and the vines in this case produce a wildness that comes as a complete and delightful surprise in the city.

The parking deck roof didn’t allow for sufficient soil depth for trees, so Kiley raised the South Garden’s hawthorns to capture more volume. The matter of organizing vegetation in architectural cages was somewhat common for Kiley in the 1960s and 1970s—think of Lincoln Center and the Ford Foundation Headquarters in New York, or of the massive rooftop gardens at the Oakland Museum of California. These configurations were always tied to structural grid conditions in the supporting architecture beneath them. Though architects have imagined trees conforming to the forces of load and support for centuries, as in ancient Babylon or in Gaudí’s Barcelona, the 1960s brought forward new and varied manifestations of the tree atop the column. Not surprising, Kiley’s well-formed convictions around geometric orders accommodated well to the spatial dimensions and cross-sectional mechanics suited to these landscapes over structure. In Kiley’s hands—with the support of two other great design talents in his office, Ian Tyndall and Joe Karr, FASLA—the precisely balanced plan configuration and cross section of the South Garden may be the most finely resolved example of this typology.

This resolve—the calm, beautifully matured relationship among the canopy, trunks, water, and ground plane—is partly rooted in Kiley’s early plan decision to organize the grid of hawthorns on the axial sight line toward Lorado Taft’s 1913 allegorical Fountain of the Great Lakes, which was relocated from its earlier position of centrality in the space to the middle of the Morton’s facade. This was a somewhat rare instance of bilateral symmetry for Kiley, coming around the same time as his symmetrical scheme for 700 honey locusts at the Third Block of Independence Mall in Philadelphia (now lost). More often, Kiley’s grids in this period are deployed to bring a sophisticated underlying order to carefully balanced, well-proportioned asymmetries, as in the North Court at Lincoln Center (also demolished) or the Philosopher’s Garden at New York’s Rockefeller University.

In my view, the tour de force move was achieved with the cross-sectional condition of the hawthorn planters. The 24-inch depth of the containers appears on approach from the street to reside at curb height, a modest and conventional six-inch lift. But along the opposing sides of the planters, the ground plane descends by three equal risers to arrive at the level of the sunken court. At that point, the full height of the planter box is revealed—on the “inside” of the hawthorn bosque. This reinforces the sense of interiority in the space, and makes it seem like a destination—an outdoor room, if you like. There’s no disputing it: You are inside.

The raised terrace on the north side of the hawthorns and the additional hawthorn bracket along the East Jackson Drive side quietly foil the central court’s symmetry. The second group of Crataegus is organized in a quincunx. Beneath these trees, a great tangle of Euonymus covers the ground and travels upward onto each hawthorn trunk. With a tall masonry wall behind to delimit your view, this space is nothing short of a manufactured wilderness—its furry and slightly messy character made remarkable by the measure of the trees, equally spaced in every direction.

Along Michigan Avenue, two raised honey locust groves call out the garden’s presence a long ways off both to the north and south—their rangy branches towering over the street and descending erratically toward the sidewalk and into the space. These trees, too, are arranged in quincunx formation, once again denoting Kiley’s interest in juxtaposing irregular tree forms with a distinct and recognizable order where they meet the ground and at eye level. When seen from the opposite side of the street, as if in elevation, the combination of gangly canopy trees and undulating subcanopy masses resembles a phenomenon we know from the successional forest—stories of vegetation, competing for the light, but working together to yield spatial richness and complexity.

My June visit to Chicago put me in the mood to consider an unanswerable question: Did Kiley anticipate that the branches of the hawthorns would eventually overlap and create the undulating veil of canopy that everyone loves? Was that the idea? Joe Karr’s photographs from 1966, the year the garden opened to the public, suggest the image of an orchard to me. That is not surprising, because we know that Kiley’s deep devotion to plants comes from his uncanny familiarity with and devotion to—which I believe was unequaled in his generation—plants in cultivation and the successional patterns of fields and forests. He certainly knew the habit of Crataegus as it grows along hedgerows and out in the sunny open field. In truth it’s a complete surprise to see this densely twigged species in such an urbane condition—not the kind of tree you’d choose to sit next to, with its coarse habit and persistent thorns. But it says something remarkable about Kiley: He could reimagine the tree he knew in the early successional field condition as one whose very characteristics could shape a special urban landscape experience. His work consistently asks us to question our typical associations and to see vegetative life in new ways.

Sometimes, magical outcomes arise from foiled intentions. Joe Karr, who saw the project through its completion in 1966, recalls that Kiley conceived this indented cross section as a means to fill the entire sunken space with water so that the hawthorns and their boxes would become frames and floating islands. The institute and the donor demurred, for cost reasons. As Karr reminds us, Kiley convinced another client to build the trees-in-water idea almost two decades later, when he and partner Peter Ker Walker designed the incredible urban swamp of 220 bald cypress trees at Fountain Place in Dallas. As implemented, the South Garden’s central plane of water and bubbling jets on axis with the Great Lakes ensemble commands the right amount of attention, and its proportions beautifully supplement the calm of the great room beneath the hawthorns.

Whether he intended to create this wavy carpet of branches as a continuous four-season overhead plane or not, Kiley’s immense confidence in his choice of species and spatial dimensions joined elegantly with his convictions about the expressive and dynamic qualities of plants and their responsiveness to surrounding conditions.

Kiley’s penchant for upending conventional typologies was at work here, too, in equal strength. The South Garden is not simply an urban orchard, nor a rooftop garden, nor a grand outdoor room, nor a common sunken court with raised planters. It’s a carefully orchestrated spatial invention, rooted in a designer’s devotion to expressing nature’s limitless enticements in unexpected ways. And it’s a place where one can find peace and tranquility amid the city’s bustle and grind. Assuredly, that’s what he was after.

Gary Hilderbrand, FASLA, is principal of Reed Hilderbrand in Cambridge, Massachusetts, and Professor of Practice at the Harvard Graduate School of Design.


THE BIG SPRIG

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BY MARK HOUGH, FASLA

Boston's Rose Kennedy Greenway has finally gotten what it always needed—time.

Boston’s Rose Kennedy Greenway has finally gotten what it always needed—time.

From the July 2016 issue of Landscape Architecture Magazine.

Call it the Emptyway. That was the headline of a 2009 Boston Globe article lamenting the perceived failure of Boston’s Rose Fitzgerald Kennedy Greenway, which had opened a year earlier atop the city’s infamous “Big Dig.” For years, the Globe had expressed concern over the greenway—over its design and the process that created it. The paper was not alone. Others in Boston, including many in the media and the design community, shared a sense that what was built fell short of what had been possible. After decades of dealing with the project, which buried what had been an elevated freeway into a tunnel running beneath downtown, everyone had expected something special. What they got, however, to many people was at best mediocre. The New Republic, in an otherwise glowing 2010 treatise on contemporary urban parks, declared that the greenway “is not merely bad, it is dreadful.”

Hyperbole aside, there was some merit to the early criticism of the greenway. Attendance in the park was slow during its first few years, and there were times when it did appear fairly empty. A common complaint was that the designers had not provided enough for people to do. There were things to look at and paths to walk along, but not much more. People expected immediate gratification after years of headaches caused by the project, which was plausible but unrealistic.

What many critics of the greenway didn’t recognize is that even the best designed urban landscapes are organic and require time to mature. That has been the case with the greenway, which, after eight years in the ground, is now a busy and vibrant urban park. The trees and plantings have grown and filled in. On nice days, people stroll, lounge, and gather in the more than 15 acres of plazas, lawns, and gardens. Food trucks and markets line the sidewalks and streets. Kids play all over the fountains and the carousel. It may not be perfect, but it is certainly not empty.

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The greenway is not a typical city park. The former transit corridor is a mile and a half long and ranges from only around 50 feet to 175 feet wide. It maneuvers through Boston’s convoluted grid, crossing streets and sliding past the distracting mix of downtown architecture. Multiple lanes of busy traffic border the space, so there is little opportunity to create long views. It is a lot about the surrounding buildings and works best as a series of urban rooms rather than some version of a green oasis like Central Park or Millennium Park—two landscapes that had often been cited as inspiration. It is, however, aging well. And much of the credit for that goes to the Rose Fitzgerald Kennedy Greenway Conservancy, the nonprofit group assigned by the state legislature in 2008 to maintain and manage the park.

Jesse Brackenbury, who has been at the conservancy since 2009 and has served as its executive director since 2014, says that he was well aware of the negativity toward the greenway when he started working for it. He was drawn to the challenge of making it better. “If I had taken the equivalent position at the High Line, the job would be to keep it from going downhill,” he says. “Everybody loves it. So mostly what you’re trying to do there is to not wreck what it is that everyone thinks is so great.” The greenway, on the other hand, was weighted with so much baggage from the tunnel project, he says, that “the park could have been paved in gold and people still would have said, ‘This is all the Big Dig gave us?’”

You do not need to know all of the details of the saga behind the Big Dig to appreciate the greenway. But the site’s complex and sometimes painful past makes the story of its success all the more interesting.

A temporary play structure installation is part of the conservancy's plans for adding fun to the park.

A temporary play structure installation is part of the conservancy’s plans for adding fun to the park.

As recently as the 17th century, the land beneath the greenway was submerged in Boston Harbor. It was gradually exposed as the shoreline was filled in to expand the waterfront. By 1959, the site had been converted to the Central Artery, an elevated, six-lane freeway built in the hope of reducing traffic congestion and revitalizing a downtown that was struggling for relevancy against its booming suburbs. It was not successful. Congestion worsened, and structural problems came to light that put the artery’s future in question. Besides that, the route was an urban design disaster, a barrier that cut off downtown from the vibrant and historic North End and Waterfront neighborhoods. In 1982, planning began on the Big Dig, which turned out to be one of the most complex, controversial, and expensive infrastructure projects ever undertaken in the United States. According to some estimates, it has cost more than $20 billion to date.

This was not an easy time in Boston. Conflicting constituencies, competing jurisdictions, and the lack of vision created a mood of frustration and downright anger among a lot of citizens. Journalists and critics tracked the multitude of logistical headaches, ballooning costs, and missed deadlines of the project. A lack of effective leadership was a big problem. The State of Massachusetts owned the land, and the Massachusetts Turnpike Authority was charged with administering the project. Both entities focused more on constructing the tunnel than on what its roof looked like. The City of Boston had coveted the land and had the most to gain by creating something really wonderful with the new open space, but it had less to say about how to make that happen.

By the time the tunnel neared completion, budget and schedule blown, there were endless opinions about what the greenway might look like, but no clear process to manage its design. Landscape architects and architects had played a role in the planning, but the project had primarily been the work of engineers and contractors.

Frustration and high expectations prompted intense community interest. The site abuts several distinct residential, commercial, and cultural neighborhoods—each with its own personality and constituency—and the public process was long and complicated.

An aerial view into Wharf District Parks.

An aerial view into Wharf District Parks.

The greenway was ultimately broken into three major open spaces—Chinatown Park, the Wharf District Parks, and the North End Parks—each to be designed by a different landscape architect-led team. Other parcels were set aside as sites for cultural buildings. Some people had advocated for a unified design vision for the entire site. Others understood that involving multiple design teams might better address the diversity of each neighborhood. The latter group included Bill Taylor, who was a principal at Carol R. Johnson Associates (CRJA) at the time, and had been involved in planning the artery since 1988. He led the design for Chinatown Park at the southern end of the greenway.

“Boston is a historic city made up of different enclaves,” Taylor says. Responding to the distinctiveness of neighborhoods such as Chinatown, where families of Chinese descent had lived for generations, was important. The CRJA team, which included the Beijing firm Turenscape, gathered “a lot of specific stories and literature to design from about the life of Chinatown,” he says. This input added authenticity to the design of the park, which takes a fairly literal approach in responding to Chinese culture, with contemplative gardens, bright red decorative gateways, a serpentine fountain, and a lot of bamboo. Chinatown had been at risk of losing its identity as people in the community moved to the suburbs and gentrification took hold. Emphasizing its unique culture strengthened the design concept and solidified the support of the neighborhood, which made the process more efficient and, Taylor says, much more enjoyable.

At less than an acre, Chinatown Park is the smallest of the greenway’s individual parks. Taylor believes its relative size helped keep it from being a target of criticism. The same might be said for the three-acre North End Parks, designed by Gustafson Guthrie Nichol and Crosby | Schlessinger | Smallridge.

Having a fairly unified Italian American population within the historic neighborhood brought something closer to consensus to its design process. So did working with the best site on the greenway. Being in the widest section and surrounded by the shortest buildings gives it the most comfortable human scale. The park is also at the crossroads of the historic Freedom Trail, which means there is a consistent presence of tourists in the area. These factors, combined with some elegant design solutions and beautiful detailing, made this the most positively reviewed part of the greenway after it opened. Even the New Republic liked it.

Reclaimed stones mark the location of the old Boston Harbor seawall.

Reclaimed stones mark the location of the old Boston Harbor seawall.

The brunt of the criticism landed on the Wharf District Parks, designed by EDAW and the Copley Wolff Design Group. At more than four acres and four blocks long, it is the greenway’s largest area. Dennis Carmichael, FASLA, who is now a principal at Parker Rodriguez in Alexandria, Virginia, was the principal in charge of the project for EDAW (now AECOM), and Lynn Wolff, who, according to Carmichael, was the “glue that held us all together,” led the planting design. (Wolff died in March of this year.) The site adjoins several communities, so there was no single constituency with which to work. “It was the hardest consensus-building process that I have ever been involved with,” Carmichael says. The process involved about 130 public meetings that were often contentious. “People simply did not want to compromise or concede anything,” he says. Without much support from the neighborhood, the plan lost much of what the design team had advocated for. “They would have been happy with colonial lampposts and cute little benches and grass.”

Neighborhood dissension was not the only challenge the design team faced. They knew that trees would be important to make the park work, given the scale of the adjacent buildings, but the city, Carmichael says, wanted a huge civic space that was all paved and did not have any trees. “We told them that if you don’t have trees, you don’t have shade. And if you don’t want shade, you won’t have people. But they held us to it. We literally had to fight for every single tree.”

The lack of tree canopy in the park compounded the sense of emptiness for which it was criticized. But critics also complained the place was just boring. Carmichael explains it was intentional to keep the design simple to “let the place breathe a little bit” and let people figure out how to “make it their own.” He acknowledges this notion is not always easy for designers, but it lets a design evolve in ways they can’t predict. “It couldn’t be prescriptive, with only one use, one user, or one season or one anything,” Carmichael says. He says he feels good about the general outcome of the park, but thinks it does not reflect EDAW’s best work.

Of the massive budget for the Big Dig, only $31 million was allocated for the greenway. This is about 0.2 percent for landscape based on costs at the time, and a much smaller percentage of the final figures. Taylor remembers Chinatown Park being built for approximately $30 per square foot, which is not much. Similar high-quality urban landscape projects were costing three times that much. Even with small budgets and all the other significant challenges, the greenway was never as bad as critics wanted you to believe. Its initial design, though flawed, successfully set the stage for the conservancy, which has since brought the park to life through its ongoing programming efforts.

Artist Ross Miller's Harbor Fog—an interactive work featuring lights, mist, and sound—is one of the temporary public art installations acquired by the greenway.

Artist Ross Miller’s Harbor Fog—an interactive work featuring lights, mist, and sound—is one of the temporary public art installations acquired by the greenway.

The conservancy counted 96,000 visitors to the greenway in 2009—the year it was lambasted by the Globe. In 2013, that number jumped to more than 800,000 people, inspiring the newspaper to flip its message in a 2013 article that celebrated it as a “people’s park.” In 2015, visitation jumped to nearly 1.2 million—more than a tenfold increase in just six years. This is not an estimate of how many people casually use the greenway by sitting on benches or walking through the spaces, but tallies of food vendor sales, Wi-Fi log-ons, event attendees, and ticket buyers for the carousel and ferries.

Brackenbury says the conservancy operates within a $5 million annual budget, which includes $2 million from the state and $3 million raised through philanthropy and ticket sales. Although the budget is not enough to support major changes, or even a sufficient maintenance endowment, it does allow for small-scale interventions and improvements. “We have been looking at ways to transform people’s experience at the greenway without actually physically transforming the space that much,” he says. The focus has been on “making this the most fun place in the city to go for lunch or spend an afternoon.”

Bringing art to the greenway has been identified by the conservancy as an important way to draw people in. May 2015 brought a temporary installation by the Boston area artist Janet Echelman. During the five months the piece was up, it attracted international attention and became a magnet for the greenway.

Echelman’s piece, aptly titled As If It Were Already Here, was an abstraction of the landscape’s transition from freeway to greenway. It is made of about 100 miles of colorful rope and was secured to three buildings. Although it weighed approximately one ton, the sculpture has an airiness that allowed it to float hundreds of feet above the ground with seeming ease. The installation was in Fort Point Channel Parks, which are located between Chinatown and the Wharf District and have been designated as the site for a large glass winter garden for the Massachusetts Horticultural Society that was never built. Halvorson Design Partnership subsequently redesigned the space with the society as a horticulturally rich series of gardens that buffer the park from the noise of the city and provide the setting for art displays and popular hangout spaces filled with hammocks and scattered Adirondack-style chairs.

Bob Uhlig, ASLA, the CEO and a principal at Halvorson Design, which had earlier collaborated on a master plan for the artery project, says the Echelman piece “was very interesting because Boston tends to be fairly lowbrow” when it comes to public art. The piece was funded with a mix of public and private money. “It was a pretty big move for Boston,” he says. “It gave a stronger awareness of the opportunities on the greenway, and helped to amp up the thinking about arts in the public sector.”

The greenway is said to have brought in more than $3 billion worth of development along its edges. There are new luxury condos, hotels, and office towers, and several buildings that once turned their backs on the artery have switched orientation to face the open space with new entries and outdoor gathering areas. This reminds Uhlig of what has happened at the nearby Post Office Square, which was awarded the Landmark Award from ASLA in 2014 and was also designed by Halvorson. It opened in the early 1990s and, says Uhlig, it has only been over “the last 10 years or so that adjacent buildings have been responding to the park, which has activated its edges.” He sees the same incremental process now helping the greenway.

The pergola in North End Parks creates a structured edge to the greenway.

The pergola in North End Parks creates a structured edge to the greenway.

The most ambitious move made by the conservancy came in 2013, when it added the Greenway Carousel inside the Wharf District Parks. It is located in a central spot that had been left open in the EDAW plan as a placeholder for the Boston Harbor Islands Visitor Pavilion, which was built in 2011. That project had been championed by the late U.S. Senator Edward Kennedy and supported with a $5 million earmark from the federal government. The two structures sit next to each other in the landscape, which was recently redesigned by Reed Hilderbrand. This new area creates a functional heart for the park and shows how important it is for urban landscapes to be allowed to evolve.

Innovative programming remains a constant priority for the conservancy. Brackenbury recognizes that the greenway needs to become more viable in the winter months. On frigid days it can still be fairly empty. “Most other cold-weather cities embrace winter more than Boston does,” he says. Even though it is windswept and snow-covered, “we’re going to try to make the greenway fun in the winter—and that’s a lot harder than making it fun in the summer.” In the works are venues for ice skating and winter markets, which have proven successful in many American and European cold-weather cities.

Financial stability may be the conservancy’s most important challenge. “We’re still a small nonprofit,” Brackenbury says. He recognizes that the maintenance will grow more costly as the park ages. Tapping into the billions of dollars in adjacent wealth will be important—something to which the Central Park Conservancy and the Friends of the High Line in New York City can attest.

The greenway still has serious challenges. Unless someone finds a way to plant more big trees, there will always be an uncomfortable scale to several of the spaces. Cars remain an unavoidable part of the experience, even as the elevated freeway fades from memory. Almost all the cross streets were rebuilt to slice through the park along its length. Also, two ramp sections jut up awkwardly from the tunnel below, carving into the space like open wounds, and creating visual and physical barriers for pedestrians. The ramps were the intended sites for buildings, but costs have made that idea unfeasible. Brackenbury says the state is still “on the hook” for covering the ramps with something more acceptable than what is there today. These conditions don’t ruin the experience of the individual spaces, but they do create an inescapable sense of chaos and make traversing the greenway a little more daunting—and less safe—than it should be.

The Canal Fountain in the North End Parks acts as a foreground for Boston's skyline.

The Canal Fountain in the North End Parks acts as a foreground for Boston’s skyline.

There will probably always be urban thinkers, critics, and designers who complain the greenway is not as good as other high-profile urban parks. The High Line, for instance, has been praised as being better. We all love to love the High Line, but I would argue that the transformation generated by the greenway has been far more impressive. The very fact that you can walk along a beautiful park where a six-lane freeway only recently plowed through downtown is amazing. People celebrate the High Line for its visionary reuse of urban infrastructure, but it pales in comparison to what the Big Dig accomplished.

To create the greenway, 16 million cubic yards of dirt had to be excavated to as deep as 120 feet beneath downtown, 3.8 million cubic yards of concrete were needed to build eight to 10 lanes of now hidden interstate traffic, and 29 miles of utility lines were relocated. And all of that without ever closing traffic. That is monumental urban planning.

I can think of no clearer example of what can be gained by cities when they invest in their public realm than the greenway. Criticism is easy, but the days of picking apart the park’s design elements because they do not meet certain expectations should be over. Bostonians who actually use the greenway seem to have moved beyond wondering what might have been and are savoring all they have. Now, as the city moves forward with plans to revitalize its emptiest urban space—the brutal City Hall Plaza across the street from the greenway—one can only hope its leaders use what they have learned.

Mark Hough, FASLA, is the university landscape architect at Duke University. He writes about campuses, cultural landscapes, and professional practice for LAM and contributes to other publications, including Places, the Chronicle of Higher Education, and regular postings for Planetizen.

Credit: Sahar Coston-Hardy.



DRIVING CONCERN

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BY ALEX ULAM

The new Mosholu Golf Driving Range is part of a controversial water filtration plant project built at the edge of the bucolic Van Cortlandt Park.

The new Mosholu golf driving range is part of a controversial water filtration plant project built at the edge of the bucolic Van Cortlandt Park.

From the July 2016 issue of Landscape Architecture Magazine.

Many things are not exactly what they appear to be at the new Mosholu golf driving range, located in the northwest section of the Bronx in New York City. Behind high stone walls and a gate monitored by armed policemen there are carefully crafted illusions worthy of an Olmsted design. A driveway leading into this place looks as if it were carved out of wilderness. On either side are sunken beds of untamed riparian plants that pool with water after rainstorms. Up a slope, past a low-slung building faced in rust-colored steel, you are at the high point of the range. The greens below are composed of hillocks with carpets of turfgrass, plush enough for a nap, which overlook a bowl-shaped depression.

Beneath the driving range is the Croton Water Filtration Plant. At a cost of more than $3.2 billion, it is among the most expensive public works projects ever built in New York City. The driving range sits atop a nine-acre green roof covering the plant, which is said to be the country’s largest contiguous green roof. It replaces an old municipal driving range bulldozed more than a decade ago to make way for the underground filtration plant, which descends about 100 feet into the ground. The subterranean structure is designed to filter up to 30 percent of New York City’s water supply.

The need to purify water, especially water that humans have polluted, has become a hugely expensive and complex challenge—that much is easy to tell from this filtration plant, as well as from the experiences of cities such as Flint, Michigan, that have failed to safeguard their local water supplies. But where to put all of that infrastructure in densifying cities such as New York, where available space is dwindling? One way New York City has dealt with its stormwater issues is by redesigning municipal parkland and public plazas. The most ambitious undertakings involve stacking gray and green infrastructure and mixing industrial and recreational uses. In the past, water infrastructure projects had engineering firms calling most of the shots. The new approach involves multidisciplinary teams in which landscape architects and park planners play key roles.

“There is a strong symbiotic relationship between water departments and parks departments that largely has to do with the water supply,” says Adrian Benepe, Honorary ASLA, a former New York City Department of Parks & Recreation commissioner. “Increasingly, they are joined at the hip in terms of stormwater capture.”

The new driving range has been set back into the preexisting Mosholu Golf Course in Van Cortlandt Park, but it is separated by a moat and walls. Credit: Grimshaw.

The new driving range has been set back into the preexisting Mosholu Golf Course in Van Cortlandt Park, but it is separated by a moat and walls. Credit: Grimshaw.

However, trying to minimize the impact of an enormous water filtration plant in a New York City park is a formidable design challenge. When you stand at the top of this gently sloping golf course, you can see the world beyond the stone walls. These are referred to in plans as “pedestrian interdiction walls,” which are in turn surrounded by a moat for an added layer of security against terrorists who might want to poison the city’s water supply. Immediately next to the golf driving range is a four-acre facility belonging to the city Department of Environmental Protection (DEP) that was built to service the underground filtration plant and is strictly off-limits to the public. It has a chemical fill station, a police booth, and a secure entrance designed to withstand bullets and blasts. The DEP site also includes a building that serves as an entrance to the underground filtration plant and features golf nets 125 feet high arrayed along its exterior to protect DEP employees from stray golf balls that fly off the adjacent driving range.

Surrounding the driving range and DEP facility outside the secure perimeter is Van Cortlandt Park, which, at 1,146 acres, is one of the largest parks in the city. The new driving range technically is still a part of the park, and beyond its walls you can see scrappy greens of the sundered main section of Mosholu Golf Course under broad canopies of sweet gums and oaks. The golf clubhouse and the moat wetlands have yet to be built. According to Grimshaw, the architects for the aboveground portion of the plant, the second phase of construction won’t even begin until spring 2017. Actual completion is now slated for summer 2019. How well this new landscape will integrate into the Norwood neighborhood and the rest of Van Cortlandt Park remains to be seen. Currently, the site is off-limits to the public and remains mostly hidden from street view by a large decorative stone fence slated to come down when the project is finally complete.

A sketch from March 2007 showing the concept for the driving range and wetland system. Credit: Courtesy Ken Smith Workshop.

A sketch from March 2007 showing the concept for the driving range and wetland system. Credit: Courtesy Ken Smith Workshop.

In the course of more than a decade of construction, there have been lawsuits to stop the construction as well as countless battles over various issues, such as the several hundred trees that had to be cut down to accommodate the filtration plant. An article in a local newspaper was even devoted to some of the heated exchanges about the removal of a particularly beloved pin oak. “It was a bucolic setting,” Gary Axelbank, the host of the popular radio program BronxTalk, told me. “You would walk by, and there would be people on the driving range, and in the distance, there were big mature trees and streams.”

Even a minor change to a public park can become a combustible issue in New York City. In this case, the Norwood neighborhood has been denied access to a stretch of parkland along a major thoroughfare for more than a decade, and people there have also endured major disruptions from one of the largest construction projects in the city. When the city’s environmental officials decided to build the filtration plant here, controversial state legislation was required to temporarily remove a 43-acre section of parkland for the duration of construction. That legislation also allowed for an unspecified amount of acreage to be permanently taken away to accommodate the filtration plant. To make the project more palatable to Bronx residents and the predominantly Latino neighborhood of Norwood, which is the poorest community bordering the park, the city lavished money on the new driving range and made more than $200 million in additional funds available for park improvements throughout the borough.

With their new highly engineered landscape, the designers have gone to great lengths to re-create aspects of the nature that once existed on the site. “There are two basic requirements for this landscape,” said Ken Smith, FASLA, the principal of the landscape architecture firm Ken Smith Workshop, during a tour of the site on an overcast day in May. “One, that the filtration plant be buried, and the other, that the site be returned to its original use as a park golf course.” Smith, who worked under the architecture firm Grimshaw on the design of the aboveground buildings and the landscape, says that the tree mass removed from the original golf course has been replaced according to a formula established by the parks department. In addition, Smith’s team even measured the distances between the groves’ trees on the outskirts of the filtration plant site and planted new groves of sweet gums and oaks according to the same ratios.

Lightweight blocks of geofoam expanded polystyrene form a base layer for the roof. Courtesy: Ken Smith Workshop.

Lightweight blocks of geofoam expanded polystyrene form a base layer for the roof. Courtesy: Ken Smith Workshop.

In many other areas, the landforms have been positioned to conceal evidence of the enormous facility below. Grassy hillocks built of structural polystyrene camouflage the sizable vents and exhaust tubes that extrude from the filtration plant. The extensive use of structural polystyrene also enabled the designers to create a varied topography with up to 12 feet of variation and still keep weight loads manageable on a green roof that, because of its large expanse, could accommodate only an eight- to 10-inch-thick layer of structural soil. The blanket of turfgrass connecting the green roof to adjacent terra firma is so seamless that you can’t tell where the underlying structure begins. In fact, to keep fire trucks responding to potential emergencies from straying onto the roof and falling through, large boulders have been strategically placed on the ground that borders the roof’s otherwise indistinguishable edges.

Smith doesn’t play golf, and dressed all in black, with his trademark thick, black-framed glasses, he doesn’t even look like a golfer. He is willing to learn, though, and he brought onto the project Stephen Kay/Doug Smith Golf Course Design, who provided the templates for how to lay out the targets and also advice about the turfgrass blends. Smith did the topography for the course and disguised the various building elements that dot the site. He made a field trip to Pelican Hill Golf Course in Newport Beach, California, for inspiration. “It was in a natural woodland and had a big gentle bowl to it, so when you were driving into the bowl it was a beautiful experience,” he said. “And here, we had these air intakes and exhausts on both sides, so we had to incorporate them and disguise them as features, so the bowl was really useful.”

The defining aspect of the project is the security walls, which Smith says extend between one and a half and two miles around the site and, in places, are topped off with monitoring systems. The walls are designed to have smooth, long gradients that follow the shape of the land. Smith says that he and the designers considered a number of materials but chose bluestone for most of their wall sections to complement the Cor-Ten steel used on the DEP building. The walls shift from bluestone to gabion baskets as they wind behind the moat. “We did it for cost [reasons],” Smith explains, “and also because of the idea of having a gradient that courses from the public to the less public.”

Ken Smith, FASLA, points out one of the wetlands he designed for the DEP section of the site. Credit: Alex Ulam.

Ken Smith, FASLA, points out one of the wetlands he designed for the DEP section of the site. Credit: Alex Ulam.

While the filtration plant below is using chemicals such as alum and sodium hypochlorite to filter New York City’s drinking water, the landscape that Smith and Grimshaw designed aboveground re-creates natural processes to control and filter 40 percent of the stormwater from the nine-acre green roof and to capture stormwater runoff from paved surfaces around the site.

Indeed, it appears that everything here, not least the slant of the green roof and the large joints of permeable concrete along the sidewalk approaching the site, has been engineered to capture and filter stormwater runoff, which is among the leading threats to New York City’s environment. The green infrastructure at this site is intended to reduce the amount of stormwater runoff polluted with contaminants such as road salt, auto fluids, and plastic bags from entering the city’s combined storm sewer system, where it mixes with raw sewage. With the sewer system currently operating at twice its design capacity, a snowstorm or heavy rain is enough to overwhelm it and lead to a discharge of pollutants into the city’s waterways, which kills off aquatic life, closes beaches, and emits waterborne vapors linked to diseases.

The state-of-the-art green infrastructure at the Mosholu driving range, if used more widely, could help the city avoid having to build more gray infrastructure such as the water filtration plant that sits beneath it. “This project is intended to be a demonstration project for stormwater management,” Smith says, adding that the landscape addresses the mission of the city DEP, the lead agency on the project, which is in charge of the city’s drinking water infrastructure and its combined storm sewer system.

In fact, the filtration plant actually is the costly consequence of not adequately controlling stormwater runoff in the first place. In 1998, the city was forced to build the filtration plant as the result of a lawsuit by federal authorities who maintained that drinking water conveyed by the Croton Aqueduct System from city reservoirs in suburban Westchester County no longer met new, more stringent standards enacted under amendments to the Safe Drinking Water Act. One of the reasons cited was that New York City had failed to protect the watershed in Westchester adequately from stormwater runoff linked to encroaching suburban development. “It could have been avoided in hindsight if, post-World War II, there had been put in place a comprehensive set of development and land controls in Westchester County,” says Eric Goldstein, an attorney with the Natural Resources Defense Council who has been involved in watershed protection efforts. “At that time the water quality was relatively high,” he says. “It would have been fantastic if city and state officials had recognized the need to control development around Croton Reservoir.”

The Croton Water Filtration Plant does not mark the end of New York City’s mounting challenges to keep its water bodies free of pollution. State environmental officials are requiring the city to take big steps to reduce the more than 27 billion gallons of sewage-contaminated stormwater that is annually discharged into the city’s harbor and waterways from around 460 combined sewer overflows (CSOs). In 2012 the city committed in a landmark agreement with New York State to spend $1.4 billion on gray infrastructure and $2.4 billion on green infrastructure, which can include some of the very systems that landscape architects specialize in designing, such as bioswales, green roofs, and rain gardens.

The landscape is designed to control and filter 40 percent of the water that falls upon the green roof. Credit: Grimshaw.

The landscape is designed to control and filter 40 percent of the water that falls upon the green roof. Credit: Grimshaw.

In the case of the filtration plant, city officials decided that having highly qualified designers on the team in addition to engineers was essential for the success of the project. Initially, the engineers Hazen and Sawyer/Metcalf & Eddy Joint Venture, hired to build the filtration plant, had developed a preliminary golf driving range design in-house, but city officials slapped that plan down. Afterward, the project was put into a design competition under New York City’s Design and Construction Excellence Initiative and awarded to the team consisting of architecture firm Grimshaw and Ken Smith Workshop. “Because it was a highly visible project, we wanted it to be beautiful and high functioning,” says Benepe, the former parks department commissioner. “We also recognized that there was some major inconvenience and dislocation both for the neighborhood having to endure the construction and the golfers having to miss their driving range for so many years.”

One of the most notable ways that this project sets a new standard is by avoiding the inorganic herbicides, insecticides, pesticides, and fertilizers that account for golf courses’ being among the most toxic of recreational land uses. Smith says that the Mosholu driving range is designed to be maintained wholly through organic methods and that it will be one of the first to use fish emulsion as a fertilizer.

Many of the features comprising the elaborate natural filtration system at the driving range won’t be immediately apparent. The vegetation and soils on the sloped roof slow the flow of rainwater, which is guided into drainage baskets filled with stones and directed to underground tanks, where it mixes with groundwater pumped in from other parts of the site. From here the water is pumped up to a gigantic cistern the length of a football field that is hidden away at the edge of the clubhouse, which has yet to be built.

A shaded cell in the complex natural filtration system helps lower the water temperature and dissolve oxygen. Credit: Grimshaw.

A shaded cell in the complex natural filtration system helps lower the water temperature and dissolve oxygen. Credit: Grimshaw.

The extensive plantings slated to be installed in the security moat that wraps around most of the site will be the most visible green infrastructure. When the moat is fully completed, it will include an outdoor classroom where children can learn about ecology and a series of 10 separate cells that use phytoremediation to remove pollutants from the rainwater that falls on the driving range. The initial set of cells will contain shallow marshes composed of wetland shrubs such as sedges and dogwood. The plantings are intended to slow the water flow and to absorb the pollutants from the driving range, which, because the range is organically fertilized, will be substantially lower in volume than those from a conventional one. The next stop is a series of pitched shaded cells that lower water temperature and help dissolve oxygen. A final cell with floating native lotus and lily pads re-creates a natural ecosystem and serves as a reservoir from which irrigation water can be drawn for the driving range as well as for the adjacent golf course.

Perhaps, once it is finally opened to the public, local residents will come to appreciate this stunning work of landscape architecture, and the memory of having lived and/or worked next to a noisy construction site for more than a decade will fade. However, currently the entire project is still an extremely sore subject in the Norwood neighborhood, says Jeffrey Dinowitz, the New York state assemblyman who represents the area. “It is not like we got anything extra out of it,” he says. “It is an improved facility, but I guarantee you that 100 percent of the people in the community would have preferred the old golf driving range and no construction.”

The new driving range and the hundreds of millions of dollars in park improvements throughout the Bronx that the city has spent as mitigation for the filtration plant also cannot erase the history of a construction project that has been riven with mismanagement, massive cost overruns, extensive delays, and several large-scale fraud schemes perpetrated by contractors. City environmental officials pushed the project on the Norwood community, arguing that the filtration plant in Van Cortlandt Park would be less expensive and provide a more efficient connection to the municipal water supply than other sites that it had considered, such as one on New York City-owned land in suburban Westchester County. The irony of those assertions is that the current price tag of the filtration plant is reportedly around $3.2 billion—more than triple the 2003 estimate of $992 million—and construction of the plant, initially scheduled to last seven years, ended up taking 11 years to complete.

The water filtration and storage system provides 100 percent of the irrigation water needed for the driving range and roofs, plus a 40 percent reduction in potable water use for the entire golf course. Credit: Grimshaw.

The water filtration and storage system provides 100 percent of the irrigation water needed for the driving range and roofs, plus a 40 percent reduction in potable water use for the entire golf course. Credit: Grimshaw.

Now, although the filtration plant is up and running, there are still clouds of uncertainty over the golf driving range project, which is slated for final completion in the summer of 2019. Despite repeated inquiries, DEP officials did not respond by press time to questions about when exactly the driving range will open to the public or how much the aboveground portion of the project is costing the taxpayers. Assemblyman Dinowitz also says it is not clear to him how public the driving range will be once it finally is open. “Will security issues be raised in the future?” he asked. “Will someone say that this is a terrorist target because it is a filtration plant? And what about the parkland that was supposed to be returned? Time will tell what happens.”

With any luck, New York City will do a better job of protecting its Catskill and Delaware watersheds and thus be able to avoid having to build more water filtration plants in the future. However, owing to the increasing imperatives to control stormwater, many neighborhoods undoubtedly will be seeing green infrastructure similar to what has been built at the Mosholu Golf Course. “I think that under current circumstances you won’t see the city designing parks going forward that don’t provide additional ecosystem services,” Benepe says. “Not so long ago we were trying to figure out how quickly we can get the water off the surface of a park and into the storm drain. Now we have turned around 180 degrees and are saying, ‘How much can we prevent stormwater entering our storm drainage system?’ and that is a sea change in this city and in other cities across the country.”

Alex Ulam is a New York City-based freelance journalist who writes about landscape architecture and urban planning.

Project Credits
Client New York City Department of Environmental Protection (Emily Lloyd, commissioner); New York City Department of Parks & Recreation (Charles McKinney, Honorary ASLA, principal urban designer); New York City Department of Design and Construction (Rebecca Clough, assistant commissioner). Landscape Architect Ken Smith Workshop, New York (Ken Smith, FASLA, principal). Architect Grimshaw Architects, New York (Mark Husser, managing partner; David Burke, project manager). Water Filtration Plant Engineer Hazen and Sawyer, New York (Ed Barboe, senior associate). Civil Engineer Ammann & Whitney, Philadelphia (Joe Riley, vice president; Irene Eells, Highway Department manager). Hydrology Engineer Sherwood Design Engineers, New York (Jason Loiselle, principal). Green Roof Consultant Rana Creek, Carmel, California (Paul Kephart, ASLA, president/principal ecologist). Irrigation Northern Designs, North Haven, Connecticut (Mike Astram, Affiliate ASLA, irrigation consultant). LEED Consultant Atelier Ten, New York (Nico Kienzl, director). Golf Course Design Consultant Stephen Kay/Doug Smith Golf Course Design, Egg Harbor City, New Jersey (Stephen Kay, ASLA, principal). Construction Manager URS/Malcolm Pirnie Joint Venture (now Arcadis), New York (Brian Farrelly, senior resident engineer). Structural Engineer Ammann & Whitney, New York (Joel Stahmer, vice president; John Bosco, project engineer). Lighting Consultant Arup Lighting, New York (Brian Stacy, principal). Security Consulting Ducibella Venter & Santore, New York (Robert Ducibella, senior principal). Ecology Consulting Great Ecology Environment + Design, San Diego (Mark Laska, president).


NEW AT HQ: THE HQ IS NEW!

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BY BRADFORD MCKEE

The storefront gallery. Image courtesy of LAM.

First, our thanks to the many members and supporters of ASLA who gave their pledges, time, and enthusiasm to help build a new home for us all, the Center for Landscape Architecture. We are holding its public opening this week. What’s especially nice is that the center is our beloved old home, our sweet, four-story, 12,000-square-foot brick box in Chinatown, D.C. It is beautiful.

Sixteen months ago, all 50 of us moved over to Metro Center, into half our usual footage (nobody died, though it’s boring over there). Back home on Eye Street, Coakley & Williams Construction blew out all the gypsum walls that cut up the insides of our building, pulled out half a puzzling scissor stair that, we’re told, wouldn’t meet code today, and found a lot of daylight in the three-story atrium it leaves behind.

The building was redesigned by Gensler. Our lower-level garden is by Oehme, van Sweden. We had such fun bringing it together. It went fast; the hard part to believe is that we began the project in 2014. The process was always focused on embodying the mission and vision of ASLA. We already had the ASLA Green Roof, by Michael Van Valkenburgh Associates, which opened in 2006 and looks better than ever. It was the second or third green roof in the District of Columbia, which now has more than 300 green roofs that combined cover more than 2.7 million square feet, or about 63 acres.

The ASLA Green Roof, by Michael Van Valkenburgh Associates, opened in 2006. Image courtesy of LAM.

We now have a physical plant that is as progressive as we could get it. Thanks to super-efficient lighting and air handling systems, in March of this year, the building used one-third less electricity over March 2015 (ASLA buys its energy from 100 percent renewable sources). There is a new stormwater collection system that takes water off the green roof into a 700-gallon cistern and uses the water to irrigate our plantings. The HVAC system makes the best air I’ve breathed in a workplace, including my own home. (The project is also aiming to fulfill the WELL Building Standard, also ahead of most others in the District of Columbia.)

It is uplifting because it’s ASLA and also because it’s Chinatown. The neighborhood has changed a lot since ASLA moved here in 1997—less China, much more town. There are huge new office buildings and a hotel all around us. But we still have a number of Chinese businesses and institutions such as the Fujian Residents Association, the Chinese Community Church, the Wah Luck House for senior citizens, and Da Hsin Trading, a variety store that sells medicinal herbs, all within a block. And the review board for designs in Chinatown does not play softball about design of street frontages. We went several rounds to get the level of bilingual signage and Chinese ornament the board required for our building. All the better.

The third-floor offices (and home of LAM). Image courtesy of LAM.

On Wednesday, the public was invited in for an open house. Our new storefront gallery holds an exhibition about the building and its sustainability features, as well as a panel on the history of ASLA and the landscape architecture profession. A group of students from John Hayden Johnson Middle School here in the District came in for a midday talk to learn about landscape architecture. Afterward our lead architect, Abram Goodrich, and our lead landscape architect, Lisa Delplace, ASLA, gave a presentation on the design process for the building. We capped the festivities with an evening reception with members and friends from all over. We could finally look around us and say with pride: This feels like a place where a serious design organization lives.

The Center for Landscape Architecture’s atrium. Image courtesy of LAM.

Removal of half a double stair opened a three-story atrium. Image courtesy of LAM.

The lower garden under construction. Image courtesy of LAM.

Linette Straus, ASLA, the society’s professional practice manager, talks with D.C. middle school students about landscape architecture. Image courtesy of LAM.

Abram Goodrich, the project’s lead architect at Gensler, narrates the early scoping process. Image courtesy of LAM.

Lisa Delplace, ASLA, a principal of Oehme, van Sweden, explains the stormwater capture and irrigation system. Image courtesy of LAM.

The opening exhibition includes a history timeline of ASLA and the landscape architecture profession. Image courtesy of LAM.

ASLA President Vaughn Rinner, FASLA, kicks off the opening dinner on May 17. Image courtesy of LAM.


THE OBAMA CENTER: NEW VIEWS FOR WHOM?

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BY ZACH MORTICE

Instagram Photo

The most important question related to the Obama Presidential Center on Chicago’s South Side doesn’t have that much to do with its architecture.

It is instead: What kind of landscape stewardship can a presidential museum and library offer? To be located in Calvert Vaux and Frederick Law Olmsted’s Jackson Park, the project already has a heap of canonical landscape history to contend with. So can the Obama library make a great park greater?

The answer is…probably. After an initial press conference in early May, park-watchers have a few renderings and diagrams of the museum and library complex, to be designed by Tod Williams Billie Tsien Architects.

Tod Williams and Billie Tsien’s lantern-like Obama museum building. Image courtesy of the Obama Foundation.

The landscape plan (by the lead landscape designers Michael Van Valkenburgh Associates, with Site Design Group and Living Habitats) consolidates much of the complex’s new programming in a tall, lantern-shaped museum building rendered in rough-hewn masonry, a luxurious Williams and Tsien signature, leaving plenty of room for green space. It also deletes all six lanes of Cornell Drive from this section of Jackson Park, which lets the museum and library stretch farther toward a lagoon and island. (Van Valkenburgh and Site Design Group declined to comment on the preliminary design.)

When the landscape team was announced last winter, Ernest Wong, FASLA, of Site Design Group told LAM that his goal was to engage with Olmsted’s plan to “get the complex to blend into the landscape.” These initial designs follow up on Wong’s intentions. Olmstedian curving tendrils extend toward the presidential center’s core, where they’re converted into rectilinear paths and a broad plaza between the museum and the low-slung library. A circular reflecting pool to the north of the museum synthesizes the exacting geometry of the new plan’s core and nature’s meandering imperfections as designed by Olmsted.

Olmsted’s curving paths converge at the Obama Presidential Center and merge into a broad rectilinear plaza. Image courtesy of the Obama Foundation.

Getting a building to blend (or bury) into a landscape requires some heavy lifting on the part of the topography and landscape itself, and that might be the most thrilling element of this plan. Winding paths from the east will take visitors up an embankment and onto the single-story library building’s green roof, where they will encounter more topography. The gradual reveal-and-obscure tensions continue on the roof through a series of small hills and glens, planted with trees and punctuated by skylights into the library. Any natural topography raises eyebrows in pancake-flat Chicago; it’s an element Wong has already used expertly in some of the city’s best and most inventive parks.

The library’s grounds are likely to be a singular green space in a city with a world-class park system. But there’s already some quintessentially Chicago precedent for a landscape that boosts patrons up a few dozen feet so they can crane their necks at architectural marvels (as the Obama Foundation surely hopes its museum will be). That would be the city’s El trains (or similarly, MVVA’s own 606 elevated rail park). The view of the city from the El train window is an iconic perspective on Chicago that’s influenced its visual history and culture. If the Obama library green roof can generate the same sense of above-but-not-quite-beyond-the-city linear experience, it will go a long way toward handing Jackson Park a new amenity. And the library will be able to offer one view the El can’t: No CTA train gets this close to Lake Michigan.

Green roofs cover the Obama library. Image courtesy of the Obama Foundation.

So this new landscape has the potential to improve upon the already very good. But for whom? Will these grounds remain public and accessible for all South Siders and Chicagoans, free of charge? (The Obama Foundation website states: “The campus will be open to the public, and the Center will include indoor and outdoor spaces for events, trainings, and other gatherings.”) Surrounding the Obama Presidential Center are South Siders who are worried about new development’s pricing them out, people wary of the ever-expanding cultural footprint of the University of Chicago (which backed the winning bid), and those who cheer it on. Most on the South Side and beyond welcome the museum and library. But unless all of the above have access to this landscape all the time, the Obama Foundation will be compounding a past wrong. The Obama Foundation came to Jackson Park after the University of Chicago offered public land in the park it did not own for private development. Meanwhile, the university owns many nearby parcels, including 11 vacant acres across the street from Washington Park (also designed by Olmsted and Vaux)—an alternative site pitched for the museum. Ensuring that the new Jackson Park landscape is always accessible to everyone will make it part of the South Side, and prove some benefit can come out of the transactional way we develop culture for the public good.

The future site of the Obama Presidential Library, in Jackson Park between 60th and 63rd Streets. Photo by Zach Mortice.

Jackson Park on Chicago’s South Side, looking southeast. Photo by Zach Mortice.

Zach Mortice is a Chicago-based architecture and landscape architecture journalist. Listen to his Chicago architecture and design podcast A Lot You Got to Holler, and follow him on Twitter and Instagram. 


LAMCAST: ASLA’S NEW HOME SNAPS INTO FOCUS

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Filmed over 18 months by Jim Richards Productions of Reston, Virginia, this time-lapse look into the construction of ASLA’s new home begins with a few swings of the sledgehammer by ASLA executive committee members and staff. Builders Coakley & Williams Construction installed green walls, opened up the roof for a three-story atrium, and dug into the earth to bury a stormwater collection cistern. The design by Gensler, with a lower-level garden by landscape architects Oehme, van Sweden, sets the Center for Landscape Architecture up to act as a leader in workplace design and ecological stewardship for decades to come.


ART DIRECTOR’S CUT, SEPTEMBER 14

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The things our art director, Chris McGee, hated to leave out of the current issue of LAM.

Photo courtesy of Lisa Daye.

From LAM’s special September 2017 awards issue, Facebook’s green roof in its Menlo Park, California, headquarters by CMG Landscape Architecture is (at nine acres) large enough to reset visitors’ assumptions of where the ground plane is.

“Rooftop reflection.”

–CHRIS MCGEE, LAM ART DIRECTOR

You can read the full table of contents for September 2017 or pick up a free digital issue of the September LAM here and share it with your clients, colleagues, and friends. As always, you can buy this issue of Landscape Architecture Magazine at more than 700 bookstores, including many university stores and independents, as well as at Barnes & Noble. You can also buy single digital issues for only $5.25 at Zinio or order single copies of the print issue from ASLA. Annual subscriptions for LAM are a thrifty $59 for print and $44.25 for digital. Our subscription page has more information on subscription options.


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