Barcombe Water Treatment Works – Major Refurbishment Works


2013 to 2014


South East Water Ltd



South East Water is one of 21 regulated water supply companies in England and Wales. They supply 880,000 properties (2.1 million people) in Kent, Sussex, Surrey, Berkshire and Hampshire, with water from more than 250 boreholes and wells, six river intakes and six surface reservoirs through more than 14,000 kilometres of water mains.


The extension and upgrade to Barcombe Water Treatment Works was South East Water’s AMP 5 flagship project. The upgrades were undertaken to ensure the processes on this site continued to operate efficiently and to enhance the supply to around 290,000 SEW customers across parts of East and West Sussex.
As part of this programme of work, an additional disinfection step involving the use of ultraviolet light (UV) was installed to eliminate public water supply risk from the chlorine resistant micro-organism, cryptosporidium. To locate the UV disinfection process a new building was constructed to house all the required apparatus, including the 2 no. 600mm steel pipes that are required to deliver the works 70 Mega litres/day (Ml/d). The client had a legal undertaking to its regulator, the Drinking Water Inspectorate, to deliver the solution by 31st March 2014.
Additional funding was gained to provide to preplace the ozone treatment plant, the chemical batching and dosing, and low lift pumps. The valves, actuators and penstocks were renewed on the Granular Activated Carbon Filters (GAC) and Rapid Gravity Filters (RGF).
The project out turned at circa £6 million, and was completed to programme, and was procured through NEC Option C: Target Contract with Activity Schedule.



  • Leading members of a collaborative project team
  • Preparation of invitations to tender
  • Tender analysis / contract award
  • All contract practice
  • Headed up regular risk reduction and mitigation meetings between the parties.
  • Project Financial Control and Reporting
  • Programme acceptance (NEC)
  • Quantification and costing change