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Drainage and Highways Services

Herrington Consulting offer a wide range of engineering based services in both drainage and highways. Our skilled engineers collectively have over 40 years experience of finding solutions to challenging engineering problems. Get in touch to discuss your individual requirements with a member of our team. We are more than happy to provide you with initial advice free of charge, to help you determine the most suitable solution for you.

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+ Surface and Foul Water Management Strategies

We provide full written strategies to support planning applications and demonstrate how surface and foul water from the proposed development site can be managed sustainably in accordance with the (non-statutory) Technical Standards for Sustainable Drainage Systems.

+ Constraints and Feasibility

Working with the developer, we provide advice on the current proposals and layout with respect to flood risk and drainage. This will enable an iterative approach to be taken regarding the design, to ensure that the proposed development will meet the necessary planning requirements.

+ Planning Conditions

We provide a technical letter with supporting design and calculations, addressed to the Local Planning Authority detailing how surface and foul water can be controlled on site, with the aim of discharging relevant conditions.

+ 3rd Party Application Comments and Appraisals

Working with the LPA, LLFA and residential associations, we provide written technical advice to appraise applications in relation to surface water and flood risk proposals.

+ Environmental Statements

Working with the developer we provide written chapters for Environmental Impact Assessments to supplement planning applications with regard to the management of surface water and flood risk.

Surface Water Drainage

+ Drainage Design and Layouts

With extensive experience in drainage design, we offer full detailed design packages and provide detailed drainage layout plans, cross sections and drainage schedules. Using the latest design and hydraulic software packages, we consider the existing and proposed ground levels within our network design to ensure appropriate hydraulic connectivity.

+ Storm Water Attenuation and Storage

Working with a range of suppliers, we design storm water storage features such as; permeable paving, cellular storage, drainage basins and ponds. We use the latest software to analyse ground levels and design appropriate features that fit within the surrounding landscape, minimising the land take for SuDS features and reducing storage volumes where appropriate.

+ Sustainable Drainage Systems (SuDS)

With extensive experience working with SuDS systems we provide written assessments to consider the suitability of SuDS and see how they can be appropriately designed to provide the most sustainable solution for your site. Within our assessments we consider the use of rainwater harvesting techniques, green roofs, blue roofs, swales and bio-retention systems.

+ Surface water flow paths and 2D numerical modelling

Using the latest hydrodynamic 2d modelling software, we model overland surface water flow paths, taking into consideration potential flow routes and the capacity of drainage network.

Foul Water Management

+ Pipeline designs

With extensive experience in the design of foul systems, we offer full detailed design service packages and provide detailed foul drainage layout plans for your foul network. We will establish how your proposed development can be adequately drained and we can help to identify suitable connection points.

+ Section 104 and 106

Under the Water Industry Act, we provide the necessary supporting information to negotiate and obtain the appropriate technical approvals to ensure the drainage systems can be adopted. Where necessary, we will seek consent to create a new connection into the public sewer system.

+ Pumping Stations and Packaged Treatment Solutions

For developments that are unable to drain via gravity, we design and provide the necessary information for private and adoptable pumping stations. Working with suppliers and pump manufacturers we device an efficient design, and look at packaged treatment and pumping solutions which will fit into your development.

Highways Design

+ Highway alignment and Vehicle Tracking

Working with the developer, we design highway and footways in accordance with the Design Manual for Roads and Bridges, to adoptable standards. We use vehicle tracking software to model turning movements and to ensure appropriate access and radiuses can be achieved.

+ Car parks, courtyard and driveway designs

Working with the developer, we can provide design layouts for parking areas, taking into consideration vehicle spacing, kerbing, drainage and loading requirements.

+ Earthworks and cut/fill

We use the latest software packages to design highways, taking into consideration the existing and proposed land levels. Where necessary, we can also provide cut and fill calculations to ensure efficiency in design.