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Cutting-edge WSUD showcased in Singleton town centre

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Cutting-edge WSUD showcased in Singleton town centre

Singleton is a regional coal mining town, located in the upper Hunter Region west of Newcastle, around two hours north-west of Sydney. In 2015, Singleton Council led a cutting-edge green technology streetscape upgrade of John Street, in the Singleton town centre – the largest public domain redevelopment project undertaken by council at the time.

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Citygreen consultants assisted and supported the project Landscape Architects and Engineers with cutting-edge design concepts that included coupling the tree pits and rain gardens to water filtration pits, enabling the removal of pollutants, flood mitigation, and passive watering.

Having involvement in streetscape projects internationally, Citygreen believes this project is positioned at the cutting edge of best practice for integration of trees with stormwater management and treatment. Detailed environmental modelling was conducted during design of the stormwater treatment train. As a result, Singleton Council has become a showcase for good environmental design in the built environment.

Chris Houghton, formerly Associate Director and Landscape Architect at Spackman Mossop Michaels, said, “Singleton Council, who initiated and managed the project, wanted to create a town centre that was iconic in the region, expressed the aspirations of the local community, provided amenity to local residents, improved environmental quality and water management, bolstered tourism, and ultimately contributed to local commerce.

“The town centre focused on John Street, and had suffered from heavy vehicle traffic, a gradual decline in architectural quality, a reliance on “pit and pipe” infrastructure and a poor quality pedestrian environment dominated by traffic movements. Redirection of heavy vehicle movements, combined with a clear staging program, allowed the re-envisioning of the public street and a return to the “hustle and bustle” of pedestrian activity as you would expect in a thriving regional town.

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“The reductions in heavy vehicle traffic meant that the broad road pavement could be reduced through the widening of footpaths and the introduction of raised crossings and rain gardens. The rain gardens were designed to receive runoff from the footpaths and road surface, filter out heavy sediments and nutrients, before returning the water to the stormwater system. In addition, the tree pit design benefited from the introduction of soaker pits which captured road runoff, filtered the water, and allowed a controlled volume of water into the vaulted tree root matrix.

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“The systems offered by Citygreen satisfied the objectives of the design team from the outset. The material made available to us by Citygreen allowed us to confidently ‘sell’ the ideas to the client. The systems employed comprised the Stratacell root vaulting and soaker pit systems, along with associated fittings and fixtures. Citygreen offer a comprehensive solution from below-ground to surface.”

Today, the finished project speaks for itself. Chris said, “The water sensitive urban design component has helped to create a new, fresh town centre, satisfying council’s objectives and something that the vast majority of local residents are now very proud of.”

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Praising Citygreen’s efforts, Chris said, “Citygreen are able to supply the technical detail necessary, in terms of structural and hydraulic design, for the design team to prepare construction design documents. Citygreen staff were available throughout the design and construction phases to assist with design queries, discuss precedents and alternatives. We see this as critical to the success of such projects.”

Ontario’s Olde Walkerville given new life with ArborSystem

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Ontario’s Olde Walkerville given new life with ArborSystem

Walkerville District in Windsor Ontario, known to locals as Olde Walkerville, offers the perfect blend of hip and history. As one of the most unique neighborhoods around, Walkerville has a rich history steeped in the early days of Prohibition-era smuggling. Now a modern and lively part of Windsor, Walkerville retains its heritage and the innate sense of “small town” welcome. With vibrant boutique shopping and dining nestled among Windsor’s largest collection of heritage properties, Walkerville is a one-stop for all shopping, dining, and entertainment needs.

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The Business Improvement Association’s goal for the Walkerville redevelopment was to transform Walkerville into an upscale shopping and entertainment area. Only a river-crossing away from Detroit’s 4.2 million population, Windsor’s immaculate riverfront parks and world-class casino have always been popular attractions for Detroit area residents, in addition to the city’s own populace.

The $3 million makeover, constructed by J&J Lepera Infrastructures, started in 2014 and took the districts quaint characteristics and historic culture to new heights. The revitalization encompassed five blocks along Wyandotte Street between Chilver Road and Devonshire Road. Plentiful tree plantings along Wyandotte Street, in addition to new street furnishings and site amenities, were a vital part of achieving the desired goal for the area. The project utilized a completely custom selection of street furnishings – a new assortment named the Wyandotte™ Collection which is now offered through GreenBlue’s street furnishing range.

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Wyandotte tree pit fences protect new landscape elements, and with the use of ArborSystem® for tree planting, the trees have been given everything they need to thrive and reach full maturity – without sacrificing the structural integrity of the paved surface.

By creating what BIA Coordinator Veronica Samek calls, “the hottest area in the region”, Walkerville has been said to share many features with nearby Toronto’s famous Yorkville – one of the most prestigious shopping districts in the world. When asked about the new Walkerville being referred to as

Windsor’s Yorkville, the BIA representative replied, “I’m good with that!” The Wyandotte Street revitalization project is another example of how GreenBlue is leveraging Citygreen technology to, “establish the future urban landscape.”

To contact GreenBlue, please phone 1 866 282 2743, email inquiries@greenblue.com, or visit http://www.greenblue.com/.

Amazon.com leverages Stratacells in new Seattle headquarters

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Amazon.com leverages Stratacells in new Seattle headquarters
by Sally Cameron

Electronic commerce and cloud computing company, Amazon.com, has leveraged Citygreen’s cutting-edge Stratacell system in its new multi-million office headquarters in South Lake Union, Seattle. Purpose-built to accommodate 20,000 employees, the new headquarters consists of multiple buildings surrounded by mingling areas and plazas.

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One plaza, located between two buildings on 6th Avenue, has been constructed above a parking structure, and is home to several feature trees (Cercidiphyllum japonicum and Magnolia laevifolia) which required large planting areas.

Engineering plans allowed enough soil volume beneath the plaza to house the trees, but a significant challenge emerged – how to provide sufficient structural support to cope with the weight of heavy vehicles such as a boom lift, to be used for maintenance. Soil cells were identified as an ideal solution, however many products were rejected because they lacked the structural strength required.

Natalie Ross, Landscape Architect at Site Workshop, said, “Amazon wanted to support soil volume for large trees in the plaza while still allowing maintenance vehicle access. Our challenge was to create a suspended paving area over structure with heavy loading requirements. We also needed to use a non-standard base course because we were over waterproofing which could be crushed or damaged by a traditional gravel base.”

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Ross said, “We chose to use Stratacells for their loading capability”, with Citygreen’s 60-series Stratacell system fulfilling the strength requirements. Citygreen worked directly with the consulting landscape architect – Site Workshop of Seattle – to design the structural elements of the plaza. This consists of 500 Stratacells, supported by a concrete slab, a drain-mat, and another slab above. Citygreen provided plan views of the installation to calculate the quantity of cells required, and to show how the slab would be supported. Construction was completed by Pacific Earthworks.

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Site Workshop, along with the project architect NBBJ, are very happy with the solution, making particular note of how quickly the cells went together and how easy it was to thread the drip irrigation through the structure. The outcome is a successful mix of hardscape and planting, accommodating both Amazon employees and visitors.

Ross said, “We’re holding up a beautiful granite paved plaza and supporting a large soil volume for trees in a harsh urban environment. The main benefit of Citygreen was their ability to work with their own structural engineers to guarantee their product under heavy loading conditions.”

Stratacell enables trees to flourish in Sydney’s Chinatown

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Stratacell enables trees to flourish in Chinatown’s New Century Garden
by Sally Cameron

A new streetscape in Haymarket has combined traditional and contemporary culture to reinvigorate the popular centre of Chinatown. Transforming the Thomas Street precinct, the streetscape works feature widened verges and a shared zone to improve pedestrian amenity, with new trees, light, seating, and artwork from award-winning artist, Lindy Lee.

Prior to the commencement of the project, Lord Mayor, Clover Moore, said, “The City is creating a more interesting public space and improving pedestrian amenities to further enhance Chinatown’s appeal. The plan for Thomas Street will ensure Haymarket remains an attractive and enjoyable place for tourists and visitors, reinforcing our Chinatown’s place as one of the best in the world. By making it easier to explore the area on foot and creating more lively public spaces, we will attract even more people to the area and further support business in and around Haymarket.”

Jon Kane, of Jane Irwin Landscape Architects, said, “Chinatown is one of Sydney’s unique and well-loved destinations. It is a significant cultural and social hub for residents, workers and visitors to the area. The new public domain has been developed in consultation with the community and celebrates the unique character and heritage of Chinatown and creates more space for pedestrians, public art, outdoor markets and events. The curatorial theme for this space is “New Century Garden” – a garden for the new century, shaped by Chinese Buddhist and Taoist philosophy invoking the elements of fire and water.”

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With new trees, green canopy, and shade central to the design, a challenge emerged – how to enable trees to thrive in a complex urban environment. Trevor Potts, of CA&I Pty Ltd, said, “This area was designed to create some respite in the heart of busy Chinatown. Trees and green canopy were essential to generate a feeling of enclosure and intimacy from the street. The challenge was planting new trees in an environment unfavourable to new tree growth due to centuries of various uses in the area. We realised the trees needed a dedicated environment for the roots to grow and flourish.”

Jon Kane said, “One of the main obstacles to be overcome by Citygreen was accommodating the existing services with tree planting. The transformation of Thomas Street, South of Ultimo Road to a shared zone required extensive civil work to the existing site to allow for street tree planting. The main challenge was providing street trees with enough viable root space to allow the plantings to establish and perform in the Thomas Street Shared Zone. This required accommodating the existing site services whilst providing structural support to allow vehicular access.

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“Citygreen’s Stratacell was chosen as the best option to accommodate the needs of the project. The Stratacell system accommodated the existing services and provided structural support for vehicular movement. It also provided viable soil and root space for the street trees and avoided soil compaction caused by vehicular traffic. Today, the street trees are performing very well, and Citygreen have been great to work with on this project. They have provided a quick response to queries regarding all aspects in the documentation and construction stages of the project.”

Trevor Potts concluded by saying, “Citygreen worked with the initial designers to develop a package that would work, then supported the contractor by answering queries and attending site during the initial installation to ensure any issues could be resolved immediately without delay to the programme. The trees have taken off and are flourishing in their new environment in the centre of one of the CBD’s busiest pedestrian areas.”

Stay tuned for professional pictures of the completed project, which will be released shortly.

Al Wasl Properties leads the way with first Stratavault installation in the UAE

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Al Wasl Properties leads the way with first Stratavault installation in the UAE
by Sally Cameron

Leading developer, Al Wasl Properties, has set a new standard in innovation by being the first developer to implement Citygreen’s Stratavault™ solution in the United Arab Emirates (UAE). A public space within a medium-rise but high density development, the project in Muhaisnah – a region of Dubai close to Sharjah – is yet to be completed but has already caused a stir in the design and construction communities.

Laith Wark, Founding Partner at Verdaus Landscape Architects, says, “This is a complex of 3000 apartments, offering affordable housing. The client wanted to provide a quality park for future residents, with large trees needed to provide shade and privacy between the apartment blocks. Shade will increase the duration that outdoor spaces will be useable, which is especially important for the children who will live in these apartments and would otherwise have little access to quality outdoor space.

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“Planting large trees was therefore very important, but there was restricted space so trees needed to be planted in the pavement. The challenge was finding a solution that would provide the required soil volume and prevent trees from damaging surrounding infrastructure. The developer was keen to embrace an innovative solution, so Stratavault was selected due to a combination of good performance and because it was less expensive than Stratacell.

“Nine matrices of 3.6 x 3.6 x 1.22m (LWD) will house one tree each, two matrices of 19.35 x 3.6 x 1.22m will house four trees each, and one matrix of 8.1 x 3.6 x 1.22m will house two trees. Tree species include: Azadirachta indica, Zizihus spina-christi, Ceiba speciose, and Cassia roburghii. This is the first Stratavault installation in the UAE, so there’s a lot of excitement around the people involved in design and construction, and pride in being part of creating something that’s truly innovative with long-term value. The construction crews, consultants, and client had never seen this kind of technology being used previously.

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“Whilst the project isn’t yet complete, we expect to see larger, longer lived trees, and better quality outdoor space. This will create a clear point of difference between this development and other affordable housing developments. In this market, rental rates are fixed by a central authority, so clear points of difference – such as large healthy trees – will give this development a competitive advantage over others.”

James Palmer, Sales Manager Landscape at W T Burden agrees, saying, “This is the first installation of Stratavault in Dubai and shows a growing appreciation for trees and the space they require for growth. Previous projects in the region have given little consideration for trees and the space they require, so hopefully this is the beginning of a change in attitude towards trees and their role and potential in the landscaping of projects.

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“Overall, working with Citygreen was simple and easy, and there is a clear application for their products. They have global project references, with proven results, and great knowledge and technical support. They also assisted with site visits and provided installation supervision during the initial construction phase.”

With this first project drawing to a successful close and praised for leading the way in innovative urban tree design, we hope to see many more similar projects in the UAE. Stay tuned.

Mackay Centre revitalised with striking Hill’s Weeping Fig Trees

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Mackay Centre revitalised with striking Hill’s Weeping Fig Trees
by Sally Cameron

In August 2014, a significant overhaul of Mackay’s City Centre commenced, known as the City Centre Revitalisation Project. This tropical CBD resides along the Pioneer River, and houses the bulk of Mackay’s hospitality and commercial businesses.

Designed and built over twenty years ago, the CBD was aesthetically outdated and often subject to minor flooding and drainage issues. The narrow sidewalk was also unsuitable for al fresco dining, and failed to offer a social, multi-faceted shopping experience. Through the revitalisation of the CBD’s aesthetic and environmental qualities, Mackay Regional Council sought to resolve these issues, and in turn promote local and regional economic development.

Dave Watt, formerly Landscape Project Manager at Vassallo Constructions, said, “The primary goal was to increase public access and better utilise the area while beautifying it and displaying some of Mackay’s existing features such as the many art deco period buildings. The project also enabled the upgrade of services to the area.”

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Ben Ewins, formerly Landscape Architect at RPS Australia Asia Pacific, said, “Once Mackay Regional Council had confirmed the preference towards using Hill’s Weeping Fig Trees (Ficus microcarpa var. Hillii) in the central medians, we identified a disparity between this species and the prospective available root space and volume. Ultimately, we needed a solution that would allow the trees to grow by creating a greater volume of space below the road pavement for root growth, without encroaching on the proposed civil works.”

Ewins said, “To achieve this, we required a sturdy support mechanism that would facilitate a number of outcomes:

1. Support significant road pavement vehicle loads
2. Prevent compaction of the soil / root zone
3. Achieve a high ratio of support structure soil volume
4. Address the concerns about warranties.”

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Jim Carless, Project Manager – City Centre Revitalisation at Mackay Regional Council, said, “This project was a hard sell, because historically there are problems with underground infrastructure being ripped up by figs and other big trees. Thankfully, Stratacell™ allowed us to kill two birds with one stone – providing a nice big volumetric space for healthy root growth, and providing a barrier to stop roots going further and causing damage. Essentially, it provides a giant planter box underground.”

Watt said, “Citygreen® were the specified supplier, because their products had the capacity to meet the complexities of the project.” In fact, Citygreen’s StrataCell system was the only product that delivered the required structural integrity needed for this application. Watt continued, “Citygreen’s products have been tried and tested on other projects. The products’ proven success provided us with confidence that we’d achieve a positive outcome in the required timeframe, and enabled different construction methods to be investigated prior to implementing the best procedure.”

Ewins said, “The resulting outcome has been extremely positive and all trees installed to date are in excellent health. The key benefit of working with Citygreen was without a doubt their immediate response times in providing solutions and inputs to what was a critical situation, which required a fast turnaround. Their expertise, along with the fast turnaround, was invaluable.”

Watt said, “A positive outcome has been achieved, with both the public and business owners in the area very upbeat about the end result. Using Citygreen technologies also provided us with confidence that there will be no rectification works required and we can be sure of longevity in this striking-looking project. We’re proud to have played a part in providing long-lasting satisfaction for the local community and visitors to the area.”

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Rob Guthrie, Principal – Landscape Architecture at RPS Australia Asia Pacific, added, “The trees are growing, and the system is proving to work well for us. Citygreen were excellent to work with, providing lots of helpful information on the product and assisting us to convince council to proceed. I’d absolutely recommend them to others.”

Carless concluded by saying, “So far, the trees are performing well with minimal leaf drop. We’re confident we’ll continue to see good growth rates, without any damage to surrounding infrastructure. Citygreen were great to work with, with helpful technical people who gave us lots of information, and were really involved leading up to construction. I couldn’t fault them, and would definitely recommend them and this solution to other organisations that have a similar challenges.”