Project description

In 2010, the Morgan Sindall Infrastructure / Grontmij joint venture was appointed to Yorkshire Water’s Medium Treatment Framework, for an initial five year period with options for a further five years.

One of the projects as part of this framework is the Scarborough revised Bathing Waters Directive (rBWD), implemented to help maintain quality bathing waters after storm events. We competitively secured this £27 million project in February 2012 following a period of joint framework partner scheme development.

It is vital to the economy and reputation of Scarborough that it maintains an ‘Excellent’ bathing water standard, in order for its beaches to retain Blue Flag status. The rBWD scheme aims to achieve this by replacing a number of combined sewer overflows (CSOs) that discharge untreated sewerage into Scarborough Bay following significant storm events.

To meet space constraints, planning issues and the need to minimise impact on the tourist industry, our project team devised an innovative and high-tech approach to process water using an ultra violet (UV) disinfection plant. This required a lower operational power demand than traditional treatment. The UV plant both screens and disinfects the storm water returned from the CSO, prior to it being directly discharged to the sea. The capital saving generated by this innovative solution was around £35 million.

Responsible business



Through active engagement, consultation and collaboration with Scarborough Borough Council, the local highways authority and transport companies, we succeeded in minimising the impact of our works on the tourist industry over two summer seasons. Through the use of our traffic and pedestrian management sequencing animation tool, we were able to plan and instigate north to south bay promenade traffic flow past the storage shaft at Toll House, considered unachievable at tender stage.


The Peasholm Gap / Corner Café Combined Sewer Overflow (CSO) required construction adjacent to numerous tourism-related businesses and high value residential accommodation. Installation of the CSO required connections into the existing sea outfall and involved three separate large pipe road crossings, ranging from 1.8 metres to 2.4 metres in diameter, around critical utilities. We complied with the required deadlines to return the road to two way traffic flow for the Easter and the two May bank holidays. Strict working hour and noise agreements were also followed, maintaining excellent community relations whilst excavating in rock at depths up to four metres and around numerous services above.


BakerHicks Morgan Sindall Engineering Solutions Grontmij Waud and Burke - Shaft and CSO Construction, Barhale – Transfer pipeline, Buntons – Earthworks, Galglass – Settlement tanks, Waitings – Scalby mills connections, Staptina – Tunnel mechanical fit out, Trojan, Canada - UV treatment plant


Considerate Constructors Scheme (CCS) score of 43/50 achieved