Progress for White Cottage Development

23 11 2017

The Stilwell Partnership were pleased to have the opportunity to work with BCI Studio architects on the White Cottage development project for AMCO homes in Woking.  The development is now under construction.

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Our Drainage Strategy identified a solution to deal with the foul and surface water from the site.  The foul water would be drained by gravity into the nearby public sewer.

The site has no history of flooding and our drainage solution would have to ensure that there was no increased risk of surface water flooding from the development.  Discharge into an adjacent drainage ditch was permitted but at a restricted “greenfield” rate.

The Drainage Strategy considered the SuDS hierarchy and selected the best option based on a geotechnical investigation of the local ground conditions.

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Using MicroDrainage calculations, infiltration through the porous paving into the ground was utilised to take surface water run-off.

Our contribution ensured that the development can be satisfactorily drained and not increase the likelihood of flooding from intensive rainfall events.

Follow the link and find out more about our Drainage Consulting and Flood Risk Management services and EIGHT things you need to know about Flood Risk Assessments

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Other consultants involved with the project were Darren Evans and Associates, Energy & Sustainability Consultants, REC Environmental Consultancy and SMB Town Planning.

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Drainage Strategy for Business Park prevents pollution from Fire-fighting event

7 11 2017

Toulouse Plant Limited proposed redevelopment of a 5,600m2 brownfield site at Littlebrook Business Park, north of Dartford.  The proposal comprised a materials recycling building, installation of weighbridges, offices, and ancillary buildings.  Their architects, March Design, submitted a Consultation to Dartford Borough and Kent County Councils.

The Stilwell Partnership were appointed to carry out a Flood Risk Assessment and develop a Drainage Strategy to submit with the Consultation.  The final Drainage arrangement had to prevent potential sources of pollution entering the groundwater, not just from normal operations, but to include catastrophic events such as a serious fire on the site.

Littlebrook Business park Schematic Drainage Layout

A Drainage Strategy considers all the many interrelated flooding and drainage issues associated with a development: Highway and Land drainage, Groundwater and Watercourses, Foul Water drainage, Surface Water drainage and Sustainable Drainage (SuDS).

The Environment Agency mapping service indicated the site is over a Minor Aquifer and is adjacent to a Ground Water Source Protection Zone.  Treatment measures would be included in the drainage network as appropriate to ensure that potential sources of pollution are prevented from entering the groundwater.

The Drainage Strategy considered the SuDS hierarchy and the best option was selected based on the underlying geology.  In this case, based on MicroDrainage calculations, buried attenuation tanks were proposed to take run-off from intensive rainfall events.  The tanks would gradually empty at a controlled rate into an existing private surface water sewer.

On site gradients and crossfalls were developed to accommodate the complex drainage arrangements.  Rainwater run-off from the roof areas would pass through a catchpit to trap the sediment content.  Surface water run-off from the parking/weighbridge area would pass through a bypass oil separator to remove pollutants and debris.

The Environment Agency requested that surface water run-off from the main yard passes through a full retention separator, to remove the potentially high silt content and debris with large sediment particles from the run-off, before discharging to the main foul water sewer.

Vehicle wash down effluent would be expected to contain high levels of pollutants. A specialised vehicle wash catchpit and full retention separator would be provided to treat the effluent before discharging to the main foul water sewer.

The Flood Risk Assessment revealed that the site is presently protected by existing off-site Environment Agency flood alleviation measures and is therefore categorised as within Flood Zone 3 (Defended)

The site is not expected to be subject to flooding provided those flood defences remain intact.  The report considered a breach of the flood defences and recommended additional flood protection (flood gates and doors) to the office and ancillary buildings, equivalent to the defence breach level plus climate change provision.  These additional measures would provide adequate time for any occupants to evacuate the site safely.

At a late stage in the process, Kent County Council raised the question of protecting the surface water drainage system in the event of a fire.  They required measures to be included that would prevent pollution bypassing the interceptors and washing into the sustainable drainage system.

It was proposed that in the event of a fire, shut-off valves would isolate the yard areas from the surface water drainage systems.  These areas have been “dished” to increase their standing water capacity.  Following a fire event, the client would use a temporary pump system to over-pump the fire water into the foul sewer before opening the shut off valves to their normal position.

In September 2017, Kent County Council accepted this proposal and lifted their objection to the development proceeding.

The Stilwell Partnership also produced a Transport Statement and Travel Plan for this proposed development.





Transportation helps Warfield Park Homes win Planning Appeal

4 10 2017

The Stilwell Partnership were pleased to be able to make a key Transportation contribution towards the success of this Appeal by Warfield Park Homes of Bracknell.

A Planning Application locating up to 82 mobile homes on their adjoining land, with suitable alternative green space (SANG), and informal open space, together with access improvements, landscape and diversity measures had been refused by Bracknell Forest Borough Council.

Warfield Park Homes appealed and on 27 September 2017, the Planning Inspector published the decision.  The Appeal was allowed and planning permission granted subject to conditions and a section 106 agreement.

One of the main issues considered by the Inspector was whether the proposed development would be in a sustainable location in respect of proximity to everyday services and facilities.

Warfield Sustainability Map

Transportation issues were carefully considered by the Inspector and described at length within the decision notice.  The Inspector considered the available facilities on site and the needs of future residents to leave the site for education and employment.

The Inspector considered the Stilwell Partnership’s Transportation Assessment (TA) and Sustainability Drawing in the context of current Planning Policies.  Referring to Providing for Journeys on Foot and Manual for Streets guidance, the TA had referred to acceptable walking distances and available public transport to reach off site facilities.  The TA also included a trip analysis to indicate the likely traffic generated by the development.

The Inspector concluded that “Whilst not well-connected, neither would (the site) be in a completely unsustainable location with no choice of transport mode or give rise to greatly increased car travel. In these respects, it would be consistent with the development plan.

The Stilwell Partnership were pleased to be part of the Project Team providing Transportation, Drainage and Sustainable Energy input to the proposed development.

The Inspector also considered the effect of the proposed development on the character and appearance of the countryside and commented “whilst the proposed development would encroach into the countryside, being similar in form and appearance to the existing development at Warfield Park, it would not be unduly incongruous or uncharacteristic”, and that “The biodiversity improvements over the remainder, and considerably larger part, of the appeal site would enhance its character.

The Project Team was led by GVA on behalf of Warfield Park Homes and included Woolf Bond Planning Consultants; HDA Enviro, Landscaping and Ecology; and legal services by Tozers Solicitors and 39 Essex Chambers.

 

 

 





The Jockey Club promotes Sustainable Travel for Cheltenham Racecourse

16 08 2017

Cheltham Racecourse New Stand

Stilwell Partnership are pleased to be appointed Travel Plan Coordinator by the Jockey Club for the prestigious Cheltenham Racecourse improvement.

The Jockey Club’s sustainability policy has ambitious targets for reducing energy, increasing the proportion of recycled waste, and minimising the impact of their business on the environment.

Their £45m investment for the new grandstand at Cheltenham Racecourse included the implementation of a Travel Plan.  The Travel Plan promotes alternative sustainable forms of transport for racegoers and staff travelling to and from the site.  Monitored and reviewed over a 10-year period by the Travel Plan Coordinator, the Plan sets challenging targets.  The aim is to reduce traffic congestion and delays, reduce CO2 and NOx emissions from vehicle exhausts and improve air quality.

As Travel Plan Coordinator, the Stilwell Partnership are responsible for the Plan’s performance, periodically reviewing the use of public transport, cycling, and walking to reach the site.  We would also be responsible for identifying further measure to improve uptake.  Results will be analysed and shared with the County Council Highway Authority, who are responsible for overseeing progress.

Advance publicity will provide a range of sustainable transport options so that visitors and staff can travel safely and efficiently to and from the course.  Options will include walking & cycling routes, public transport, and car sharing.  The location of car charging points for electric vehicles will also be provided.

Around 300,000 visitors attend the annual 4-day National Hunt festival in March.  In addition, an increasing number of visitors attend other popular race meetings throughout the year.  Outside these periods there is frequent use of the course facilities for conferences and exhibitions.

Implementing a Travel Plan at Cheltenham Racecourse provides valuable data that can used to further improve the uptake of sustainable transport elsewhere.  Successful techniques learned here may be introduced at other racecourses or sporting events around the country.

Go to our website project sheet





Derbyshire Development Wins Planning

12 07 2017

The Stilwell Partnership were pleased to help their long-standing client, Tapton Estates, win Outline Planning Approval for the proposed development of Derwentside Industrial Park, Belper, Derbyshire.

Amber Valley Borough Council unanimously approved the Application on 11 July 2017.

The scheme comprised the demolition and clearance of existing industrial buildings and re-use of the 6-ha site for 136 residential units.  The proposals also included access improvements and associated works.

Belper Tapton Master Plan

The Stilwell Partnership, with colleagues from the Patrick Parsons Group, put together a comprehensive package of technical assessments addressing many of the contentious issues and potential financial challenges facing development of the site:

The Transportation Assessment addressed potential future Traffic Impact and the long-term sustainability of the site.

The Travel Plan Framework provided an overall strategy to encourage sustainable transport measures; to increase walking, cycling, use of public transport and encourage more efficient car-use.

The Geo-Environmental Assessment examined the geotechnical issues on the site including ground conditions, potential contamination, and the building foundation requirements.

The Utility Constraints Assessment ensured there was adequate service capacity for future development without major investment in utility diversions.

The Flood Risk Assessment and Drainage Strategy confirmed that there was minimal flood risk on the site and that a foul and surface water drainage system was feasible within the capacity of local network.

The Noise Assessment considered the impact of noise from nearby roads and suggested mitigation measures that could be incorporated into future development.

On this proposed development, the Stilwell Partnership worked closely with the other project team members; David Lock Architects, FPCR Environment and Design Ltd and Rigby and Co, Commercial Property Agents.

If you would like to know more about these individual reports, or how we can deliver a successful one-stop package of services for your development, please phone our office on 0333 700 401 or email us

 





New Marriott Hotel, Cable Street, New Cross, City of Manchester

13 10 2016

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The Stilwell Partnership supported the successful Planning Application by Axcel Property Developments Ltd for a new Marriott hotel providing multidisciplinary design advice including Highways & Transportation, Drainage, Low Carbon Energy and Noise Assessments.

A full Planning Application was submitted for a 172-bedroom hotel on the brownfield site of a surface car park in Cable Street in Manchester’s New Cross area. The development comprised the hotel (Class C1) with associated public realm, landscaping and other associated work. Proposals included a café bar, fitness centre, meeting rooms and associated servicing areas.

Our package of engineering design services included:

A Transport Statement of the development’s transportation impact on the local highway network. Our assessment considered sustainable forms of transport, including opportunities for walking and cycling, and the accessibility to public transport. We also considered servicing and emergency vehicle access. Our assessment concluded that the development could be accommodated without detriment to vehicular flows and road safety.

A Drainage Strategy, to minimise the impact on the wider area from surface and foul water from the proposed development. The very confined site limited the range of sustainable drainage options. An attenuation solution was identified to control the surface water run-off.

The Noise Assessment highlighted the application site was in a relatively noisy area impacted from road traffic noise on the A665 Addington Street.  Mitigation action proposed triple glazing to the bedrooms on the assumption the hotel would have air conditioning, to control internal noise levels to meet the standards set by WHO and BS 8233:2014.

Manchester City’s Planning Policies place great emphasis on decentralised energy schemes in the City centre. Using our CHP modelling software, the Sustainable Energy Assessment determined that the proposed development would be able to potentially contribute towards a future local district heating scheme and achieve an improvement of at least 15% CO2 emissions based on the predicted energy demand.

 

See the project sheet here: http://stilwell-ltd.co.uk/Projects/Cable_Street

 





The end of the Code for Sustainable Homes, Sustainability Statement and Pre Assessments

12 05 2015

Councils will now only be able to impose certain nationally agreed sustainability levels as planning requirements for new residential developments, the technical details of which will be contained within the Building Regulations. The government hopes this will help reduce the cost and complexity of building homes in England and stop the cherry picking approach to housing standards.

Thanks to the Housing Standards Review, the Code for Sustainable Homes has now effectively been removed from planning policy in England and was removed in Wales in 2014.

The Ministerial Statement said: “…local planning authorities and qualifying bodies preparing neighbourhood plans should not be set in their emerging local plans, neighbourhood plans, or supplementary planning documents, any additional local technical standards or requirements relating to the construction, internal layout or performance of new dwellings. This includes any policy requiring any level of the Code of Sustainable Homes to be achieved by new development; the government has now withdrawn the code, aside from the management of legacy cases”.

What this means for you:

New Planning Application for housing will not be required to achieve any specific Code for Sustainable Homes standards. A range of standards for access and water efficiency will be applied to new schemes by planning, some of which provide a higher standard than the minimum national building regulations – these technical standards will be enforced through the Building Regulation process Space standards will be nationally described and will be implemented through the planning system. In addition, a new security standard has now been included in the Building Regulations (Part Q) Waste storage standards will now be properly considered in new housing development. All existing Planning Applications (or when a site has started) will need to continue with Code Standards (unless the condition is removed). Housing Association and RSLs will still need to apply Code Standards under the National Affordable Housing Programme.

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