Drainage Design

The drainage of a development is very rarely seen or thought about by people when looking at a new development which has been constructed. However the drainage designed and installed underground or on the surface as part of surface features is an important and integral part of the design and layout of developments in terms of both dealing with the anticipated flows from a new development, but also ensuring the development does not contribute to increased flood risk to the site itself or other sites in the vicinity.

Design of drainage for a new development or re-development of a current site form a very important part of the site strategy and are closely linked to flood risk. Indeed, some flood risk mitigation measures directly affect the type and design of proposed drainage systems.

From assessment of existing drainage infrastructure on a site to obtain current run off rates, Greenfield and Agricultural run off rate calculations and preliminary drainage strategies through to final detailed design of attenuation and Sustainable Urban Drainage Systems (SuDS) can have a major impact on the development proposed and the layouts and viability of such developments.

It is important from an early stage in any development that drainage is considered and impact dealt with to ensure the site development encompasses all the requirements necessary to meet with the required standards and constraints to meet planning requirements. This is often required to be materially considered as part of a Planning Application.

Drainage can form simple private systems connecting into existing adopted sewers but can also form large adopted systems with integrated SuDS structures to control and manage run off rates from proposed development sites.

Other important considerations which must be borne in mind at the initial stages of development are identifying viable points of discharge from the site for both foul and surface water and acceptable rates of discharge. These can be absolutely critical to the development viability and layout.

Whilst for some Outline Planning Applications a full detailed design for the drainage is not required, the viability of the development to be drained adequately is required to be proven as part of the Outline Planning process.

For Full Planning Applications and reserved matters (discharging planning conditions on a valid planning permission) a full drainage design is required to ensure that the site can be drained adequately and meet the requirements of the Planning Conditions imposed. This usually involves construction drawings and full hydraulic calculations to support the design and drawings.

Sanderson Associates Drainage Design Services.

Sanderson Associates provide a comprehensive drainage design service which include assessment of existing drainage infrastructure through to design of new systems including attenuation and other forms of SuDS to adoptable standards for development.

Sanderson Associates have undertaken many and varied types of drainage design from preliminary assessments for small developments through to full detailed design and adoption through S104 agreements for large employment and residential developments.

Our drainage design service offers valuable advice to clients on the most cost affective and viable solutions to drainage problems and options available including sustainable systems.

Our drainage expertise also follows through into our Flood Risk Assessment Services which ensures that any drainage or flood risk mitigation measures recommended as part of a Flood Risk Assessment are best value design and bespoke to any such development. Please visit our dedicated flood risk site www.floodrisk.co.uk for further information on our flood risk services and expertise.

Require the Services of a Drainage Design Consultant?

We would be pleased to provide you with our competitive fee proposal to provide you with our Drainage Design Services, please call us on 01924 844080 or click here to complete our secure online form.


What our Clients' say:

Highway Advice – Testimonial

Mon 9 May 2016

Bob came to the island as an, ‘expert witness’, in a Planning Appeal, for a sizeable property build, essentially covering the Highway issues. After meeting Bob the day before the Appeal, it was abundantly clear this chap, ‘knew his stuff’. His consummate professionalism, experience and knowledge came though at the Hearing, contributing to the process […]

Transport Report in Opposition to Proposed Large Scale Housing

Tue 5 April 2016

We commissioned a Transport Report from Sanderson’s in opposition to a proposed large scale housing development near us. Ian Ladbrooke provided professional expertise in identifying the transport issues and the flaws in the developer’s transport assessment. His input proved invaluable and ultimately the application was refused on transport grounds. The report was delivered on time […]

Swept Path Analysis, Proposed Extension to Industrial Development

Mon 7 December 2015

As an independent property developer I was asked for a swept path analysis to aid my planning application. I googled and found Sanderson Associates, never had I heard of them before. I have to say from the start they were extremely professional and very prompt. I asked for many amendments on my analysis at the […]

Residential Development and Agricultural Access

Wed 16 September 2015

In my work as a planning consultant, I have come across a number of intransigent highway officers. Engaging Sandersons has allowed me to overcome these problems and secure planning consent for some difficult sites. They offer efficient and professional service which I can thoroughly recommend. Adrian Rose, Rose Consulting

Swept Path Analysis – Residential Development

Wed 5 August 2015

 Many thanks for the final swept path analysis drawings. Can I also say that its been a pleasure, and we will definitely use your services again on future projects. Richard On behalf of C E Gilbert & Son Developments Ltd

Swept Path Analysis

Mon 27 July 2015

We are a small civil engineering consultancy mainly involved in the design of housing developments. We often require swept-path analysis in order to satisfy local councils that their vehicles will be able to access the development. We send our site plans to Darren at Sanderson Associates who always provides a fast, efficient and consistent service. […]

Planning Appeal Rebuttal, Proposed Residential Property

Mon 13 July 2015

 We initially engaged Sanderson’s to carry out a traffic survey to support a planning application. They were recommended by our architect and their quote was very reasonable compared with other survey companies that we approached. Unfortunately, the initial survey was sabotaged when the monitoring tubes were pulled up by an unknown third party. Sanderson’s recommended […]

Flood Risk Assessment, Residential Development

Mon 15 June 2015

Sanderson Associates has provided us with a very professional service, and has always responded extremely quickly and efficiently to our client’s requirements. Laura Elias, Assistant Planner, CBRE Ltd

CPD Seminar Highway Development Control and Flood Risk

Tue 31 March 2015

I would like to thank the Team at Sandersons for providing CPD Seminars on Highway Development Control and Flood Risk to our Chartered Surveyors. The content of each meeting was both relevant and informative and gave useful, practical guidance on each topic. It is clear that Sandersons have a wealth of knowledge and expertise in […]

Speed Survey and Sight Line Calculations

Mon 23 March 2015

From the first time we spoke with one of your associates it was clear that Sanderson’s is a professional organisation. It was only a small project – a traffic survey for visibility splays – but we were made to feel like our custom was important. Everything was done promptly, within budget and with excellent and […]

Drainage Design, Run off Rates, Sustainable Urban Drainage Systems SUDS, Adopted Sewers, Foul Water, Surface Water, Rates of Discharge Outline Planning Process, Construction Drawings, Hydraulic Calculatons