CONNECTING DERBY TRANSPORT PROJECT
Silva Cell provides additional soil for 20 car park trees

Connecting Derby is a government funded integrated transport project that aims to improve transport links in and around the Derby city centre. High on the Counil's agenda for the site was to improve the aesthetics of the Abbey Street car park following the removal of the original London plane trees from the site

Shaun Phillips, Derby's Arboricultural Officer, wanted to create an environment where the newly planted trees could thrive. The Council, searching for the best possible way to establish the replacement trees, was focused on nourishing long–term growth and creating a lasting legacy for the site. Typically, Derby street trees are under enormous stress due to inadequate access to oxygen rich soils. As a result, average life expectancy for recently planted trees is around 20 years, and they remain stunted and incapable of environmental or aesthetic impact. Longevity of the new trees was of paramount importance

Mr. Phillips and the Council settled on the use of Silva Cells to provide the new car park trees with generous volumess of lightly compacted, nutrient- and oxygenrich soil that could also help manage stormwater at-source. A total of 20 trees -- Oriental Plane Platanus orientalis ‘Digitata’ and Silver lime Tilia tomentosa ‘Brabant’ -- were planted in the Derby car park within the Silva Cell system, which wasinstalled by UPM Tillhill in conjunction with A and M Landscapes in October 2010. The trees, some of which have shared planters, have an average of 13m3 of soil each. With proper care and maintenance, they will exceed a fifty year lifespan.

The Council and Derby residents, meanwhile, will be able enjoy their beauty and environmental benefits for many years to come, all while avoiding the costs of short-term tree replacement or sacrificing any parking spaces

In addition to the benefits offered to those who use the Connecting Derby car park, this project is part of the overall green infrastructure plan for Derby, which includes moving traffic away from existing roads and onto the new ring road to create a more pleasant walking environment. There will also be pedestrian-friendly controlled crossing points along the new road. As a result of the smooth and quick installation of the Silva Cells at the Abbey Street car park, the upgrading and inclusion of the Silva Cells for a second project at the Wilmot Street Car Park was also realized as part of the Connecting Derby Project.

Installation Summary
Total soil volume: 257 m3(13 m3 per tree)
Number of Silva Cells: 838 frames, 419 decks
Client: Derby City Council
Main Contractor: Bam Nuttall
Sub Contractor: UPM Tillhill

For more information, please contact Steve Chatwin-Grindley (steve@deeproot.com).

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