We replaced the existing band screens, including all design, procurement, phased installation and commissioning for the associated works.  This coincided with the July 2007 Gloucestershire floods, enabling us to play a significant role in supporting Severn Trent with emergency activities on site.

Recommissioning:  Our site team, together with Severn Trent's emergency support personnel, drew heavily on our technical and security resources.  Severn Trent supply chain partners provided support. 

The works were successfully recommissioned within a two-week window - a significant achievement for all concerned and an example of true partnership.  These works involved up to 25 staff and supply chain commissioning specialists at any one time - operating in shifts over 24 hours, seven days a week.  Activities included:

• Redeployment and management of technical specialists to carry out the commissioning works
• Programming the re-commissioning works down to half hour time slots in order to support the client team and for onward reporting to government.

Construction of a 1km flood barrier:  Mythe was flooded in the first days of the emergency and came under threat of more flooding several days later.  The Works plays a vital role in supplying water to over 350,000 residents. 

Emergency teams were mobilised to erect flood defences against the predicted flood.  Meanwhile, the joint Severn Trent and Interserve team worked on bringing the Works back on-line.

BIGWELL WATER TREATMENT WORKS

This project enabled Severn Trent Water to meet its obligations to the DWI and achieve its water quality targets for cryptosporidium.  The project team designed, installed and commissioned reverse osmosis membrane technology to remove cryptosporidium from the raw water source.

The works included construction of retaining walls, a steel-frame portal building, storage and treatment tanks incorporating specialist piling techniques, twin membrane reverse osmosis skids, pumping systems, chemical dosing systems and all controls/instrumentation.

ELAN VALLY AQUEDUCT - maintaining a water supply for Birmingham

This scheme ensures security of supply for local, isolated communities.  It protects against emergency at Trimpley, the main water treatment works for the area.

The project involved extracting up to 26Ml/d of raw water from the aqueduct into the Hollywaste reservoirs.  This was via a new remote duty/assist dry well pump station and rising main.  Raw water was then pumped through the new low-pressure ultraviolet inactivation treatment to remove any potential cryptosporidium.  Before entering existing reservoirs, water was disinfected using a new automated sodium hypochlorite dosing plant.

Framework value:  around £100 million over five years.

These are just a few of the complex projects Interserve is delivering for a valued client.