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Archive for the ‘Sustainable Materials’ Category


A number of bold new works of contemporary landscape architecture in Europe show the power of pavers, those small, sometimes interlocking sets of paving materials. Creating a sense of depth and quality with simple geometric forms, these projects are subtly elegant. Here are a few offering unique textures that may draw you in:

In the new city center of Nieuwegein, Netherlands (see image above and below), Dutch firm, B+B Urbanism and Landscape Architecture, turned an outmoded shopping mall into a new “vibrant heart” for this relatively new city. The theme, a “blooming city”, is represented in the bold paver patterns, says the firm in Landezine. Natural stones are used in a mixture. “The pattern breaks free of both plan and architecture by means of an abstract representation of such natural elements as branches and flowers.”



Another form of city center, a new town hall square in Solingen, Germany, by German firm scape Landschaftsarchitekten, is an “urban living room” for the municipal workers in the surrounding building. Again, a bold geometric pattern is used to create a striking landscape. The design team writes in Landezine: “To build a coherent area, a pattern of black and white lines traces the whole public open space. Like a marquetry, a connecting concrete carpet integrates various functional elements and provides zones with different characters and uses.” The central square is defined by the pattern, as are the sides of the green spaces, which allow for movement. 



Four courtyards then serve as a “counterpart to this open, lively square.” The courtyards are arranged as “abstract gardens.” Notice how the black and white pavers transform into less hard-edged strips of gravel, with plants coming into the mix. In fact, wherever nature appears, the black and white pavers seem to disintegrate.

 

In Pas-De-Calais, France, the old textile mills along the banks of the Haute Deûle canal are being transformed into a new park. Designed by Atelier des paysages Bruel-Delmar, the project pays honor to the canals and irrigation ditches, but creates something new as well. Working class factories and dorms are now office buildings for high-tech workers. Public spaces and a new water garden filled with phytoremediating plants draw in residents from the community and techies taking a break. 



The design team wanted to create new public spaces without “depriving this quarter of the charm that resides in the proportions of the streets bordered with worker houses.” A new courtyard creates the sense of a hard linear park that respects the working class vibe, while pavers made out of concrete and industrial basalt create texture along paths. 



Image credits: (1-3) Blooming City Center / Renee Klein, Frederica Rijkenberg, (4-7) Town Square, Solingen, Germany / atelier 2, Gereon Hofschneider scape Landschaftsarchitekten, Rainer Sachse, (8-12) Haute Deule / Atelier de paysages Bruel-Delmar

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A new bin design in Portugal makes recycling fun and easy, two qualities not often associated with sorting your trash. These qualities may be needed though, at least in higher-trafficked areas, given most recycling bins are anything but user-friendly these days. Created by architectural and urban design firm AND-RÉ, the prototype set of bins are meant to give recycling a higher profile in the community, while will also encouraging more “democratic” use among many types of users.

The use of bold forms and colors is meant to seduce people into recycling their organic waste, glass, metals, paper, and cardboard. The designers assert: “The negative perception of the garbage bins was forgotten by changing the status of the object itself.” And people seem to be responding. Tourists were seen taking photos next to the bins. Children were even observed asking parents to put garbage in the right bins, turning sorting into a kind of game.


Made of composite fiber and high-resistance stainless steel, the bins limit unpleasant interactions with “dirty surfaces” and waste smells. While the set of bins have a similar look, inside, there are different sorting and storage mechanisms. ”The system for organic waste and metal use a container (a drum with rotary counterweight axis) associated with the movement of the lid. Glass and paper systems use a fixed conduit, regardless of movement of the lid.” There’s also a pedal that frees the hands so more O.C.D. users can avoid touching the bins all together.


While the design is eye-catching, more sustainable recycled (and recyclable) materials should be incorporated if these get rolled out in more communities in Portugal or elsewhere.

Image credit: AND-RÉ

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The Sustainable Sites Handbook: A Complete Guide to the Principles, Strategies, and Best Practices for Sustainable Landscapes by Meg Calkins, ASLA, elucidates strategic design approaches, measures for site performance, and provides an intelligent framework to discuss sustainability and understand technical issues. The handbook is extremely clear and well-structured, synthesizing a wealth of specific information into a useable form. The book embodies the very significant achievement of the Sustainable Sites initiative (SITES), in its broad-based collaborative approach to the subject.

The book begins by discussing the conceptual underpinnings of sustainable design and then moves through a comprehensive project development framework; from planning and site selection, through water, vegetation, soils and materials, to a discussion of human health and well-being and the issues of management and stewardship.

The broad disciplinary base of the SITES program, with its numerous expert contributors and reviewers, has allowed a surprisingly detailed and nuanced approach to the subject areas covered. The value of the book is as a guide to practitioners who are finding their way through the SITES system but also as a general reference to issues of sustainable site development more generally.

Perhaps even more than its professional use, I believe the book will be an invaluable resource for educators and students as a guide to sustainable design practice. Its comprehensiveness and synthetic approach to issues of site development and management provide a framework that can be broadly applied. The book brings together sound technical and procedural information placed within a well-reasoned intellectual context.

The book’s layout is clear and legible but the book design and production exhibit the limitations of quality in both materials and images so ubiquitous in contemporary textbooks. Given the density of the material, significantly more attention to a more dynamic graphic design and layout would have made a profound difference to the reader experience. The photographic images, which are vital in the elaboration of the text, suffer from being uniformly low contrast black and white images as a result of paper quality, and a more varied and lively design approach to typography, illustrations, and color would enhance both the ability to absorb the information and relay how much fun it is. Given the quality of the content and its broad market appeal, this would have been an opportunity for the publisher to invest in what should be a classic text and reference work, and one can only hope that will happen for subsequent editions.

Given the scope of this book, Meg Calkins has done a superb job in providing intellectual direction and expert content and guiding her excellent collaborators in the creation of what is destined to become a key reference work for the profession.

Read the book.

This guest review is by Elizabeth Mossop, FASLA, Professor, Robert Reich School of Landscape Architecture, Louisiana State University

Image credit: Wiley & Sons

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There are many ecological technologies that can make a street green, but the key element is being “flexible, adaptable,” said Neil Weinstein, executive director of the Low Impact Development Center, a non-profit organization dedicated to promoting the use of green infrastructure in the built environment, at a session organized by the National Building Museum. Weinstein, who is a licensed engineer and landscape architect, was co-chair of an American Society of Civil Engineer (ASCE) conference on green streets, and, through the LID Center, has been a pioneer in green infrastructure, so his take is worth hearing.

Weinstein said there are lots of different technologies both landscape architects and engineers are using to make streets greener, including deeper street tree pits; compost-amended soils; permeable sidewalks, bikelanes, parking lots, and streets; and bioretention systems, including bioswales. These systems create not only “complete streets” that offer equal access for pedestrians, bicyclists, and cars, but are also ecological systems that manage stormwater.

More than a decade ago, Weinstein was involved in creating the first green street in Washington, D.C. on 8th street, which features a “permeable structured swale” along the sidewalk. Since then, the green street movement has grown, with some even looking at “green highways” that can offer conservation and ecosystem protections, include recycled or reused materials, and provide “watershed-driven” stormwater management. 

Perhaps one sign of the growing demand for green streets is that there are more 25 rating systems offering points or credits to enable these systems, said Weinstein. In fact, Envision, a new one created by the Institute for Sustainable Infrastructure (ISI) in collaboration with the Zofnass program for sustainable infrastructure at the Harvard University Graduate School of Design, was just released. Envision, which was largely designed by a consortium of engineering organizations and is primarily aimed at engineers, seeks to provide a “a holistic framework for evaluating and rating the community, environmental, and economic benefits of all types and sizes of infrastructure projects.” ISI says that the Envision can also be used by landscape architects and architects, planners, community groups, regulators, and policymakers for “roads and bridges, airports and waste treatment facilities, ports and refineries, high rise buildings and electricity grids.” 

With or without rating systems, there has been some recent success stories designing and implementing green streets. In the D.C. area, the Edmonston green street has gotten lots of attention. Financed in part by E.P.A. stormwater management grants, this project designed by the LID Center is increasingly being presented as an easily-replicable model. Weinstein said the project involved putting this community’s main street on a “road diet,” narrowing the space for cars in favor of new bioswales, permeable sidewalks, and bicycle lanes that “better tie into natural systems.” He said this project and others demonstrate how useful it is for local government to move from a “prescriptive” approach that dictates what needs to go where to a “performance-based” approach that asks what is needed to solve environmental issues.

Still, there’s more work to be done to make green streets mainstream. Within national standards organizations, there should be a move towards “concurrence (not consensus) about new approaches and materials.” Local demonstration projects “that ask the right questions” are still needed to show how national models can be applied to the unique conditions of local communities. Communities need to see and understand how these green street systems actually work.

Image credit: Edmonston Mayor Robert Kerns demonstrates permeable pavement / Greg Dohler. The Gazette

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Following the success of Easy Rider, an installation by land artist Patrick Dougherty, Dumbarton Oaks, which used to be a somewhat stuffy D.C. institution, seems to have really let loose with Cloud Terrace, a new temporary installation by landscape artists Cao | Perrot. In an effort to create “fresh, unexpected experiences” in Dumbarton Oaks’ gardens, Andy Cao and Xavier Perrot roped in a bunch of volunteers to create hand-meshed clouds that dangle some 10,000 Swarovski crystals (on loan), creating the effect of raining clouds. While some argue that messing with these gardens is like “adding a moustache to the Mona Lisa,” said John Beardsley, director of the landscape studies program, the new Dumbarton Oaks team is for “breathing new life into these landscapes,” which are “living works” no matter how historic.

In describing his firm’s work, Cao, who was born in Vietnam but raised in the U.S., says he’s into creating temporary places. However, the real theme seemed to be recreating the beauty and power of key moments in nature, like ”Cherry blossoms blooming,” but using non-conventional materials to create these effects. At first glance, their installation can seem otherworldly.


Cao and Perrot discussed some of their earlier works. Lareau Garden, one of the duo’s earliest installations, includes thousands of glass pebbles, which seem to create a river through the site. The project took two years to create but looks like it just happened.

The Lullaby Garden project was created using rolled earthen forms, while carpets of biodegradable nylon material were sewn and laid on top, also creating a sense of rolling waves. This project, like others, has an ephemeral feel and uses organic and recycled materials designed to disintegrate, destroying the landscape art work in the process. Cao said: “the colors were designed to slowly fade and the forms will disappear over time.”


An eye-opening project, Mimosa, in the Luxembourg Garden’s Medici Foundation, used fresh mimosa flowers suspended on fishing lines to bring a bit of New Delhi to France.


An earlier cloud project, which is in the same family of projects as the Dumbarton Oaks installation, brings clouds to a backyard in Los Angeles, while the unbelievable Willow Tree is made up of 80,000 mother-of-pearl leaves crafted by a village in China.


This project, like so many others by this team, is clearly inspired by nature and creates similarly powerful effects, yet is somehow not natural. Perrot tried to explain: these projects are for a “specific time – they are about the moment. They are not just a landscape, but a total environment.”

The duo is not just stopping at the small, temporary scale but are delving into large-scale works of landscape architecture, too. One park in the works in China will be more than 600 acres and will promise a sequence of outdoor “rooms” with different experiences, all set using their “intuition” throughout. 

If in Washington, D.C., be sure to check out Cao | Perrot’s temporary installation before the crystals have to be returned or see their portfolio online.

Image credits: (1-3) Cloud Terrace  at Dumbarton Oaks;  image © Stephen Jerrome for  cao | perrot studio, (4-7) copyright Cao | Perrot

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So few cities have great outdoor sculpture gardens, but, lucky for us, Montreal is soon to join that exclusive list. Later this year, the Montreal Museum of Fine Arts (MMFA) will open an expanded sculpture garden, making it one of Canada’s largest collections of public art. A key piece of the project is transforming one street along the museum into a new pedestrian mall during the summer months. All of this only happened because the museum and city government worked closely to design the project.


For the new sculpture garden, which actually lines the streets in parts, there will be over 20 art works, including new commissions by David Altmejd and Jim Dine. In this outdoor gallery, though, the elegant streetscape and plinths may be as big of a draw as the art.

A design team made up of Wade Eide, an architect with the city, Julie St-Arnaud, a landscape architect, Gilles Arpin, a lighting designer, and Adad Hannah, an artist, set up a set of “collaborative design workshops” to create basic concepts for a ”unified” environment for the museum’s four pavilions. According to the team, the project led to changing the “geometry” of two streets, including widening sidewalks to increase street space for pedestrians. One street slopes up, so this part of the sculpture garden will be designed as a set of terraces that flow upward. 



The art and streetscape material elements are only enhanced by the addition of a dozen new native trees, including Ironwoods and Accolade elm trees. There are also new pieces of urban furniture, designed by Hannah, that offer both plinths for the artwork and places to sit. In fact, the design of the trees and sitting areas are inspired by Montreal’s natural environment and its Mont Royal. The design team writes: “The incorporation of very large tree pits filled with shrubbery evoke the rich vegetation of the mountain, while the selection and placement of urban furniture and plinths for the sculptures composed from limestone blocks symbolize the limestone of the substrata of Montreal rising up from the tree pits and from the concrete sidewalks.” 



Beyond the deep tree pits and native plants, there are also innovative new sustainable materials. A research project by the Université de Sherbrooke, which was funded by the Société des alcools du Québec, the provincial liquor vendor, led to a concrete mix composed of “finely ground glass made from discarded wine and liquor bottles,” which enabled the design team to cut down on the use of Portland cement. It’s also a lighter color, which fits in with the aesthetic profile of the project.  

The project is about creating a sense of “simplicity, utility, and noblesse,” while offering an outdoor exhibition space that provides a ”neutral background” for the sculptures.  

The museum is in the process of redesigning its spaces and reinstalling 4,000 works of art in new collection spaces. Good to know when next in Montreal: the museum’s permanent collection is always free.

Image credits: (1) Early conceptual 3D photoreal rendering, aerial view: Bernard Fougères, MMFA, 2009, (2) Early conceptual 3D photoreal rendering, street view: Bernard Fougères, MMFA, 2009, (3-4) Terraced Sculpture Garden under construction / Denis Labine. City of Montreal, (5) Working model of streetscape / Wade Eide, (6) Plinths / Denis Labine. City of Montreal

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Robert Hammond is Co-Founder and Co-Executive Director of Friends of the High Line, the non-profit conservancy that manages the High Line, a public park built atop an abandoned, elevated rail line on the west side of Manhattan. Hammond was awarded a Rome Prize from the American Academy in Rome, as well as the Rockefeller Foundation’s Jane Jacobs Medal for New Ideas and Activism.

In the beginning of your and Joshua David’s personal story about transforming the abandoned High Line rail line into the most applauded park of recent years, The High Line: The Inside Story of New York City’s Park in the Sky, you say that early on, living in Chelsea you’d seen parts of the High Line, “but never realized all the bits and pieces connected.” What did the High Line mean in your community? When did you first understand the space in its entirety?

I lived in the neighborhood so I had always seen it when walking around, but I didn’t think it was all connected. I really didn’t think that much about it until I read an article in The New York Times in the summer of ’99 that said it was threatened with demolition, and it included a map. The article showed that it was a mile and a half long running through the Meatpacking District and Chelsea, all the way up to Hell’s Kitchen near the Javits Convention Center. That’s when I first realized the whole extent of it.

I assumed someone would be working to preserve it. I called around and thought the American Institute of Architects or the Municipal Arts Society would be working on this. So many things in New York have preservation groups attached to them. But pretty quickly I found no one was doing anything for the High Line and that it was actually going to be demolished. I heard the proposed demolition was on the agenda for a community board meeting in my neighborhood so I went to my first community board meeting ever and sat next to Joshua, who I didn’t know at the time. By the end of the meeting we realized everyone in the room was in favor of demolition except for us. So we exchanged business cards and we said, “Well why don’t we start something together?”

Early on, you and Joshua had a multi-faceted strategy to keep the dream alive, to prevent the Guiliani administration from tearing down the High Line. You focused on building community support, visually documenting the site, creating design visions of what could be, while finding powerful advocates in the city government and also filing lawsuits. Which aspects of the strategy, in retrospect, proved to be most critical to moving the High Line forward in those early days?

Josh and I get a lot of credit for this great strategy. I think the most important thing we did was start the project, and it allowed other people to come along and help us get it done. In some ways, it was an asset that neither Josh nor I was an architect, landscape architect, or city planner. It forced us to basically go to other people for help. Talking to people who are interested in starting their own kind of project, that’s always the point I try to make: The most important thing that they can do is just start something. That enables other people to come along and help them get it done.

People always ask, “What was the one most critical time or event?” There wasn’t. The project had so many different pieces — the political, the economic, real estate — that there wasn’t one specific thing that made a difference. There were a whole bunch of different things. One of the things that I think is very interesting and that really connected the landscape and the ultimate design of the High Line were the photographs by Joel Sternfeld.

When Josh and I went up there, we realized what was right there in the middle of Manhattan. I first fell in love with the High Line from the street. I loved the structure, the rivets, but then when I walked up there, there was a mile and a half of wildflowers running right through the city. That’s what I really fell in love with: the combination of this wild landscape on top of this industrial structure in the middle of the city. We knew most people were never going to see it like this so we took our snapshots which just didn’t look that great. They didn’t really capture the impact of it. So I got a photographer named Joel Sternfeld to go up there and over the next year, between 2000 to 2001, he took a few pictures in all four seasons. He ultimately published a book called, Walking the High Line, back in 2002. Josh and I think of him as the third co-founder because those photographs of the wild landscape are what really helped galvanize people. I realized the most effective way to bring people on board was to show them the photographs, talking less and taking more time for people to experience the High Line through the photographs. Joel’s images really made the case for the project.

In the beginning, we didn’t know what the High Line should ultimately look like. We didn’t know exactly what the design should be. We always thought the community and the city should decide what it should be. Over time, people coalesced around Joel’s photo and when you asked them, “What do you want the High Line to be?” they’d point to Joel’s photos and they’d say, “I want it to be like that.” In some ways, that was the biggest inspiration behind the design, Joel’s photos of the landscape.

Getting the Bloomberg administration behind the effort meant coming up with a solid economic feasibility study, which you had to raise lots of funds to do. The study came up with the idea of transferring developers’ air rights and rezoning the area for commercial development. As the High Line developed, it has helped spur literally billions of dollars of new property development with a number of buildings by many marquee architects going in. Was that part of the original plan?

It was. We knew that the High Line had to make economic sense in the long-run, so we realized that for some people pretty pictures weren’t enough. We also needed an economic impact study, which is a really powerful tool for people working on parks projects because landscape, park, and public space projects can have a tremendous economic impact. Too often people just rely on what it looks like to make the case.

Of the design teams you invited to participate in the competition you said, “If I could do it over again, I’d require a landscape architect to be in the lead.” Why?

I think it’s really important. In the beginning I didn’t feel that way. I thought it would make sense for an architect to be a lead, but this is truly a landscape project. There are some architectural problems, but one of my favorite quotes is from one of our architects, Ric Scofidio, who said his job was to save the High Line from architecture. We were lucky to have that kind of architect. But going back, it’s really a landscape issue. When I talked to architects about their concept it was all additives, about adding things to the High Line. Landscape architects are better at dealing with existing conditions. Landscape architects almost always have some existing conditions, whereas architects are used to beginning from scratch. The existing condition was so important to us and had such a deep connection with the history and what people fell in love with, and James Corner recognized that.

I can’t emphasize it enough: too many times, I’ve seen people doing public spaces mesmerized by architects. For better or worse, architects have a higher profile. Architects are the name brands in public spaces. How many landscape architects can the average person name? It’d be zero that are alive. But they know architects. However, I think that’s changing. James Corner, Michael Van Valkenburgh, Hargreaves. It’s starting to change, but I think it’s just so critical for people not to be mesmerized by the famous names of the architects. What is really needed is experience working with existing stuff.

You say that a line from the book, The Leopard, sums up really your design philosophy for the High Line. “If you want things to stay as they are, things will have to change.” You had wanted to preserve the wild plants that had taken root on the abandoned tracks, but Piet Oudolf, a key part of the winning James Corner Field Operations and Diller Scofidio + Renfro team convinced you that you could create something as beautiful as the High Line in its natural state. How did the winning team change the High Line but keep it the same, preserving the idea of its natural state?

From the very beginning, they were arguing among themselves about this challenge of how do you keep what’s magic but at the same time create something new? What I liked is that they knew you couldn’t just preserve it exactly as is. That would be a mistake. If you just tried to keep it exactly as is, you would create some kind of Disney World version. It’s coming back to that quote: you need to create something new to preserve that magical feeling.

Going up there by yourself where you had private garden was magical but what the design team was able to create was an experience that is really better with people in it. It looks better with people in it. Now when I see pictures of just the High Line without any people, I realize it wasn’t as good. It’s really beautiful when you have people interacting with the new landscape of the High Line. Also, the High Line has this unique ability to make people look better. People just look better on the High Line. I think that the landscape enhances that, too. The plants are able to do that in a way I think it’s hard for buildings to do.


During the design competition you found James Corner Field Operations and Diller Scofidio + Renfro to be “avant-garde,” but dealing with details like bench width and comfort, they showed a “real practicality.” How did the landscape architects, architects, and garden designer work with you and Joshua to realize your vision for the details of the park?

One of the reasons that sometimes things would come back more expensive is that the contractors had never done the things the designers were looking to do. Like the stairways, they came back and it was incredibly expensive. The designers calculated that it would be just as cheap to crush Mercedes-Benz and have them be the stairs as what the contractors did. The contractors were offering these high estimates just because they hadn’t seen this before. It wasn’t what they normally saw. For example, our paving wasn’t normal. But at the end of the day it wasn’t that complicated. Our paving system is really pre-cast concrete planks, so it’s just fancy parking curbs done in an array of different forms. Our design team would work with the contractor to help them understand how it was not that complicated or different from things they’d done in the past.

A number of cities now seem ready to jump on the High Line bandwagon. However, some landscape architects and planners caution that given the High Line was community-driven, it can’t really be replicated. Any copies may succeed as an economic development engine, but these projects may not get any true buy-in from communities. Do you think the High Line’s success can be replicated?

There are certain projects I really like, which have their own integrity. A lot of them are generated by communities. There’s the Bloomingdale Trail in Chicago, which was originally based in the community and came from a few people who lived in the area. The Atlanta Beltline, which is a much bigger ambitious project, started as one student’s thesis. The Jersey Embankment right across the river is definitely a community-based project. A project has to have that spirit from below. I think the best ones are not trying to copy the High Line; they’re trying to be something new altogether. This is the test to determine success: whether they try to create something original just like the High Line did or not.

I have my personal goals for the High Line: one is that it’s a well-loved park by New Yorkers; two is that it gets better after Josh and I leave; and three (and most importantly) is that it inspires other people to start these kind of things — not just elevated rail lines, but any kind of project. You don’t have to have experience, you don’t have to have all the money, you don’t have to have the plans all set. We developed all those things over time. That’s what stymies a lot of people. They think, “Oh, I don’t have the experience,” or, “I don’t have the money.” Those things can come.

Well, you’ve just kind of answered the last question, but I’ll just throw it out there in case you have anything else to add. What advice would you have for other community groups trying to save and perhaps transform their local infrastructure and cultural assets, whatever they may be? What advice would you have for the landscape architects partnering with them?

There’s no perfect way to do it. The most important advice is just start it and experiment. Just try things. There’s no one specific path. There are multiple ways to get started. Now a great way to do these things and galvanize a project is Facebook. Start a Kickstarter account — I’ve seen that working a lot now. One of the really important things is to raise money. It also helps start building the community. Whether someone gives five dollars, five thousand, or five million dollars, when they give money they become more invested in the project. It’s literally skin in the game. It’s an important part of building an organization or a whole movement.

We had a lot of people donate their time and energy to this project before it got off the ground. By finding community groups that need help, landscape architects and architects can, in effect, create more clients for themselves. Landscape architects can donate their services, get involved in local spaces, or just create their own.

Interview conducted by Jared Green.

Image credits: (1) Robert Hammond / Image credit: Annie Schlechter, (2) A Railroad Artifact, 30th Street, May 2000 / Joel Sternfeld © 2000, (3) Looking East on 30th Street on a Morning in May, 2000 / Joel Sternfeld © 2000, (4) 23rd Street Lawn, the northern end of the 4,900-square-foot lawn peels up over West 23rd Street, looking West, toward the Hudson River.  ©Iwan Baan, 2011, (5) A meandering pathway passes by old and new architecture in West Chelsea, between West 24th and West 25th Streets, looking South.  ©Iwan Baan, 2011

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California’s Burbank Water and Power (BWP), one of the first power companies in the U.S. to procure a major chunk of its power from renewable energy sources and develop an ambitious carbon reduction plan, is transforming its main campus from an ”industrial relic” into a “regenerative green space,” bringing the utility to the forefront of sustainable landscape design. The new landscape is among the 150 sites selected around the country to participate in the Sustainable Site Initiative (SITES) pilot program. Los Angeles-based landscape architecture firm AHBE Landscape Architects was hired by BWP to create an ambitious ”EcoCampus.”

Already, the new campus has three of the 50 LEED Platinum buildings found in California, including its first super-sustainable warehouse. Beyond the buildings, though, the campus offers green roofs, which were designed to “reduce the urban heat island effect, help channel and filter storm water, and reduce the building’s air conditioning requirements;” water reclamation and filtration systems, and new employee green spaces carved out of a reclaimed substation. 

The green roofs were installed across three buildings in the BWP campus. According to the utility, “the timing was perfect as our aging roof needed to be replaced.” Adding green roofs also saved the company, which is promoting energy conservation as a key cost savings measure, a bit of money themselves, some $14,000 annually. 


AHBE Landscape Architects designed a number of filtration and stormwater capture systems that compliment each other. Green streets with permeable pavers and ”infiltration bump outs” along three city streets filter runoff before it enters the campus’ stormwater system, where it’s then captured by the built planters and trees set within silva cells, which enable the trees to grow taller. Roof runoff is filtered down to the landscape, where it’s used up by the greenery. “By California law, all projects are required to mitigate at least the first ¾ inches of rainfall. Thanks to the innovative technologies that AHBE has integrated into the design, the BWP EcoCampus already mitigates the first inch.” The end goal is zero runoff on site.


A substation structure was left in place, providing a repurposed outdoor meeting room. “The skeletal remains of the substation will soon be covered in living vines, creating a poignant juxtaposition of industry and environment.”


Calvin Abe, FASLA, President, of AHBE, made the case for transforming the utility’s industrial landscape into a productive one: “Landscape has a key role to play in the regeneration of our cities. Beyond the aesthetics, it can proactively counteract many of the problems that we face in urban environments.”


But their job was made a lot easier because their client’s vision is a bold one. Ron Davis, BWP General Manager, said: “BWP chose to do this to show that sustainability is not just about a single action or decision; it’s about the ripple effect that consistent, sustainable decisions can make. BWP’s EcoCampus is literally powered by innovation. We want this to cause a ripple.”

Watch a video about the BWP’s new campus.

Image credits: © Sibylle Allgaier, Heliphoto

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Both practicing and student architects are exploring intriguing new bench forms in New York City. In some cases, the goal is to provide benches that offer a range of benefits: multi-use infrastructure at the sidewalk-scale. In another case, the idea is to build a flexible, ergonomic model that can be scaled-up at low-cost.  

The Architect’s Newspaper focuses in on ”subway vent benches” that offer seating and flood control. As a response to the floods that inundated the N and R lines in 2007, putting them out of service, the Metropolitan Transportation Authority and Department of Transportation teamed up to create a new ”streetscape element with some wit and whimsy” that could protect the subway against debilitating flooding. Rogers Marvel Architects decided to raise the edge of the subway vents, protecting them from flood water while creating undulating waves of slates that are tall enough to sit on. The forms are also modular: “There are three typical grates designed for specific water overflow depths. They can be combined in a left- or right-hand fashion to create the continuous surface over the structural grates below.”

A similar project by Grimshaw provides flood control solution, but this time adds in both bicycle racks and bench seating. Grimshaw says they incorporate both “with an intent on maximising transparency with minimal impact on New York’s busy sidewalks. The design was engineered to be robust and to withstand significant vehicle loads. The furniture components are secured with tamper proof fixings and are fabricated from a higher grade of stainless steel, meeting NYCT durability standards and minimising ongoing maintenance.”


Both projects won AIANY design awards.

Now in the realm of prototype: How to create low-cost seating that can hold up to the elements but also meet the ergonomic needs of a city filled with people of lots of different shapes and sizes? To explore this problem, Columbia University graduate students created an urban bench inspired by “kinetic Slinkies and reverberating see-saws.” Costing just $1,000 and built by 10 students using nearly 1,000 pieces, the bench now creates a “continuous landscape, each seating condition designed according to existing ergonomic profiles in order to maximize comfort and functionality.” The project was also used to test “the limits and capabilities of digital fabrication.”


The students at Columbia write: “The scalability of the joint system and design together creates a truly parametric system in which its use is not only for aesthetics, but for construction, functionality, and comfort as well.” The bench could definitely work, but the person sitting on the other side will need to play well.


Image credits: Undulating Bench / Rogers Marvel Architects, (2) WTA Bench / Grimshaw, (3-5) Polymorphic / Charlie Able, Alexis Burson, Ivy Chan, Jennifer Chang, Aaron Harris, Trevor Hollyn-Taub, Brian Lee, Eliza Montgomery, Vernon Roether, and David Zhai, Columbia University Graduate School of Architecture, Planning, and Preservation.

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Michael Van Valkenburgh, FASLA, and his fellow speakers got multiple rounds of spontaneous applause at the 2011 ASLA annual meeting for hosting a session on a topic near and dear to many design professionals and wood experts: how to end the unsustainable harvesting of Ipe wood and scale up the use of sustainable alternatives. The real alternative may be Black Locust (Robinia pseudoacacia), which Van Valkenburgh and other progressive landscape architects, architects, engineers, and wood manufacturers have already been using for some time. In addition, domestically-grown Black Locust may offer new opportunities for local sustainable forestry businesses. The trees grow fast and are hardy (in fact, in many areas, they are treated as invasives) and can even take root in urban areas, so they can provide a new source of employment in cities like Cleveland and Detroit, where populations are collapsing and landscapes aren’t as productive as they could be.

Ipe is a tropical hardwood often used in outdoor decks and furniture because it’s so resilient to rain, insects, and weather changes. It’s special properties also mean that it lasts a long time. However, there is a dark side to this wood, which is all too often still used in park and residential projects. Just a few Ipe trees are found per acre in dense, lush tropical forests, which means foresters must wreck havoc on the forest to extract and process those single old trees. Van Valkenburgh and others argue that there must be alternatives.

Why Black Locust?

Stephen Noone, ASLA, senior associate, Michael Van Valkenburgh Associates, said Black Locust lasts just as long as Ipe. He said it’s a “pioneering, not invasive” plant that “takes root on sites that other plants don’t like.” Unlike Ipe, the tree grows together in densely planted areas. In Europe and Asia, it’s already treated as an acceptable crop. In fact, a number of countries are moving forward with planting large groves for wood production, a business that, oddly, has failed to take root in the U.S. 

A research project by Michael Van Valkenburgh Associates’ interns found a plantation in Hungary producing a range of different quality Black Locust woods, including top quality woods. They found that Black Locust can “only be planted in marginal areas where Oak can’t be established.” In a smart move, a local forestry research organization and local wood producers aforested a massive area. Now, 8,500 hectares of dense Black Locust forests are being harvested in just one area there.

Black Locust has “high natural durability, is heavy and hard, but has a tricky kiln drying process,” said Noone. It’s “not going to rot and is insect resistant.” Noone delved into the details of moisture content, and the process needed to achieve the desired content levels. There is a complex multi-step process that involves lettting the freshly cut wood air-dry to reduce moisture and then using a “dehumidifier kiln.” Noone said “the process is very strict,” and “dilligence is required on the part of the drier.” There’s also a long lead time for landscape architects: 40-50 days until the wood can be used. But it’s worth it: Beyond the sustainability benefits, Black Locust is also cost-effective. In bulk, it’s $5.44 per square foot, while Ipe is more than $7 per square foot.

Building a Bridge in Brooklyn

A new pedestrian bridge made entirely of Black Locust and designed to move people from neighborhoods in Brooklyn into Van Valkenburgh’s Brooklyn Bridge Park (see earlier post) is now taking shape. Ted Zolli, HNTB, said in this case, “black locust is better than concrete in terms of its compression, strength, and flexibility” and an “incredibly viable structural material.”


Zolli showed how timber bridges aren’t a new thing. Some 20 percent of current bridges are made up of wood and some are more than 100 years old. This 400-foot long bridge is comprised of pre-fabricated pieces created off-site and the delivered and installed in BK. Some parts of the bridge span 120 feet. All together, there’s about 30 tons of wood. He said for this gangway, Black Locust was the right way to go.

HNTB purposefully tested how vulnerable the wood is to fire and found that it doesn’t lose its strength as it burns. “It’s better than steel and will do better in a fire than the cable wires we are using.” For him and his firm, the real challenge was getting a hold of longer planks and finding the right connector systems for the bridge components.

The Properties of Black Locust

Don Lavender, Landscape Forms, a man Van Valkenburgh called a “national treasure,” discussed the opportunities and challenges in scaling up a domestic Black Locust industry. He said there is great potential for the tree in the U.S. but it’s about “obtaining prime examples and taking selections.” Lavender said the best trees are found in the Appalachian region.

Black Locust was originally given to settlers by the government during the early expansion of the U.S. because it’s very fast growing. Within 15-20 years, the material can be cut down and burned. At 30 years old, it can be used for materials in homes. Lavender said the best of these trees “competed for sunlight with other trees.”

The tree can be used for many products, and even lesser-grade woods aren’t wasted. “100 percent of the tree can be purposefully used.” Lavender said lower grades can be used for mulch, biomass fuel, parquet, and greenhouse poles. The higher grades, #1 grade, premium and premium plus (the top 5 percent), are the result of a more challenging “kiln drying process” that requires “patience.” The wood is tough and resistant to drying for the “same reason it’s so resistant to decay.”

Once dried properly, it can easily be “cut, sawed, drilled, sanded, and shaped.” No outdoor finishes are needed and its screw retention is good. Its Janka hardness also compares favorably with other woods. At 1700, it’s better than Red Oak (1290), but a bit less than tropical hardwoods like Jarrah (1910) and Ipe (3684).  It’s also difficult to glue. But biologically, Black Locust is “remarkably decay resistant.”

Scaling up Cultivation and Production in the U.S.

Van Valkenburgh said the U.S. is falling further and further behind globally. “The country is losing its edge.” Currently, there are 5 million acres of Black Locust under cultivation worldwide, but “virtually zero in the U.S.” Korea has 1.2 million acres, China has another 1 million, while Hungary has 270,000 acres. “This is something that has the potential to be an economic engine in many parts of this country.”

Instead of being viewed as an invasive, as it is in many parts of the U.S., Van Valkenburgh said it should be grown in set-aside areas. Lavender added that the Amish, who “don’t waste anything,” has been using Black Locust for ages. The Amish, who have perfected techniques over generations, are in fact a perfect model for Black Locust production: “proper kiln drying is not something you just get into one day. It takes generations to learn this.” He added that a number of firms have “blundered into kiln drying” and ended up with kindling. “It needs to be done methodically” if an industry is going to bloom here.

Van Valkenburgh is currently using Black Locust imported from Hungary. A firm in Massachusetts is importing containers from Hungary and “taking it upon themselves” to expand the domestic market. While using this wood puts him out of the 500 mile range the Sustainable Sites Initiative (SITES) calls for in sourcing sustainable materials, he said “we have to think bigger about sustainability. The lifespan of these woods is several multiples higher than others.” Still, he wants to see the woods grown domestically. 

The Black Locust market in the U.S. is “still in its infancy” despite the advocacy efforts of Van Valkenburgh and others. Hopefully, some smart city officials will see an opportunity. As one audience member said, Detroit and other cities could not only turn their abandoned lots into forests, but Black Locust forests. Van Valkenburgh went even further: “Planting on reclaimed sites is a great idea.”

Van Valkenburgh, Noone, Zolli, and Lavender kindly shared their 84-page presentation (8MB) full of rich content, photos, and data. Download and help spread the word.

Image credit: (1) ASLA 2006 General Design Honor Award. Small is Beautiful. Michael Van Valkenburgh Associates / Elizabeth Felicella, (2) Walkway into Brooklyn Bridge Park / HNTB

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