Transportation Proposals Help Win Surrey Council’s support for Garden Village

24 07 2018

Bonnar Allan’s proposals for a ‘garden village’ in South Godstone, Surrey have been included in Tandridge District Council’s Draft Local Plan.

Centred around the existing railway station, a new village centre and new community facilities, the sustainable new community would deliver up to 5,000 new family homes, in conjunction with multi-purpose schools, green spaces, a knowledge hub for rural enterprises, superfast broadband and an arts and cultural centre, a food quarter and leisure facilities (including sports pitches), all within a high quality, visually attractive location.  The developer believed that their scheme would provide a unique opportunity to meet the long-term housing needs and infrastructure of the area.

The developer had appointed The Stilwell Partnership to address the Transportation issues; one of the key concerns of local Planning Authority. AppB - TSP-BAL-P3079-003 C Sustainable Transport-1

Based on the results of Stilwell’s Transport Scoping Assessment, the developer included transportation improvements in their Transport Vision Statement:

  • A South Godstone by-pass to the east of South Godstone village, through the site and under the railway line. Diverting through-traffic away from the rail station would create a safe centre for people to access the station and shopping areas.
  • Improvements to the local walking and cycling infrastructure, including a new shared cycleway / footway along the A22, and improved controlled crossing points across the A22.
  • Railway infrastructure improvements, including a new station building, extended platforms, lifts, cycle parking and a new underground car park.
  • Significant enhancements to the local bus services.AppC - TSP-BAL-P3079-002 C Access Strategy-1The facilities to be delivered, and shape of the whole development, would be agreed through the subsequent community consultation and Planning process to respond to the needs of existing residents of Tandridge.

    The Transport Scoping Assessment determined the traffic and transportation issues that would need to be addressed as the project progressed.

    We had considered the vehicle trip generation, and the distribution and assignment of those journeys through the five access points from the development on to the local road network.

    We identified that a detailed Transportation Assessment, to be prepared at a later stage for the Planning Application, should consider full turning movement surveys at up to 30 key junctions including the A22 Trunk road and its junction with the M25.

    AppE - TSP-BAL-P3079-09B - TripDistribution-1Preliminary consultations were held with the rail services operator, Govia Thameslink, Surrey County Council, Highways England, and local bus operators.

    The assessment considered the sustainability of the site; looking at walking and cycling routes and access to rail and bus services, including to the five schools in the catchment area.

     

    We are pleased to have helped this project through its first critical phase, we look forward to progressing the detailed planning application with our professional Highway & Transportation Services.

The Stilwell Partnership, part of Patrick Parsons Group, also carried out a Flood Risk Scoping Report and a Geotechnical Site Appraisal Report for this proposed development.

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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.





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.





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