Northumbrian Water has gone out to tender with a contract for construction works at the Hanningfield Water Treatment Works in Essex worth an estimated £5.2 million.

The contract covers construction of a washwater tanks extension at the Hanningfield WTW which is located within Essex and Suffolk Water's Operating Region.

Northumbrian Water is looking to appoint a contractor to carry out the construction of 2 nº wash water tank and pumping station alongside the existing wash water tanks and pumping station.

Construction is scheduled to start in July 2018 with the aim of having the asset/works in use before January 2020 as this is a date agreed with the Environment Agency.

The existing tanks will remain in service and be incorporated in to the new works - the existing pumping station and tanks will be refurbished only once the new works is fully commissioned and in service.

The scope of works includes:

• Reduced level excavation for the wash water tanks and pumping station basement including the installation and removal of temporary works.
• Construction of two new concrete wash water tanks.
• Construction of new pumping station comprising of pump basement, interconnecting pipe work to the tanks and an above ground building to house the new MCC and beam crane.
• Pipe laying and manhole construction.
• Supply, installation and commissioning of all M&E equipment inc. pumps, pipework, valves, control systems, MCC, sub-station and new HV electricity supply.
• Construction of a new overflow structure at the emergency lagoon.
• The need to keep the current system running during the construction of the new works.
• ICA control — A fully automated PLC controlled process, with HMIs communicating back to the Central SCADA network.

Time limit for receipt of requests for documents or for accessing documents is  14^th February 2018 and 21^st February 2018 for receipt of tenders or requests to participate.

Click here to access the tender documentation