Coast were involved at the pre-planning stage, providing solutions for the drainage design on site. We were faced with two main problems regarding the outfall and the surface water storage. After discussions with the highway and drainage authorities, we proposed a cost-effective and politically straightforward solution that dealt with the outfall issue. We also provided a sustainable urban drainage technique (the design of a detention basin) to handle the surface water, approved by the lead local flood authority.

In addition to this, Coast helped the client obtain the necessary planning permission, and has also provided a number of full detained engineering drawings.


We worked alongside the client from conception right through to the build phase. They required drainage design that provided a sustainable as well as a traditional technique to deal with surface water storage. To do so, we had to find a solution which met the requirements of both the local authority (Northumbrian Water) and the government, a task made difficult by the difference between the two standards.

To meet the criteria, we utilised public open space as a natural flooding point. This above ground drainage created flooding areas which duly catered to the difference in standards between governmental and local bodies.


We were employed by the developer to look at Section 278 works on the main A1068 trunk road, which runs through the centre of Amble. Part of the works was to incorporate a roundabout onto the existing layout. This involved negotiation with Northumberland County Council, liaising with their highway officers to determine the best course of action.

The work undertaken included a road safety audit, vertical and horizontal geometrical design, a number of meetings on site with the Council and signage for a trunk road.



Backworth – Engineering and opportunities assessment for site viability
Harrowgate Hill – Utilities assessment
North Tyneside – Earthworks Volumetrics and review of site constraints


Morpeth – Flood risk assessment, flood zone 3
Runcorn – Flood risk assessment and drainage strategy, flood zone 2
Wheatley Hill – SUDs design, Drainage Strategy, Flood Risk Assessment and Proposed Levels
Peacock Gap – Flood risk assessment

Detailed Design

Fencehouses – 160 residential units
Blyth – 394 residential units
Killingworth – 160 residential units
Langley Moor – 271 residential units
Darlington – 10 Social housing units
Scotswood – 20 Social Housing units
Amble – A1068 S278 works, design of new roundabout
Browney – Retention basin for adoption by Durham County Council
Newcastle-upon-Tyne – Coordination of public utilities and underground district heating network
Newbiggin-by-the-Sea – 24 residential units, engineering and acquisition of utility services


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