Havant Thicket Winter Storage Reservoir - Portsmouth Water
The proposed development of a winter storage reservoir at Havant Thicket will deliver the long term legacy of a substantial water resource, and an enhanced and vibrant environment with substantial opportunities for recreation and learning.

Portsmouth Water plans to promote and construct a winter storage reservoir for public water supply purposes on Company-owned land at Havant Thicket, Rowlands Castle, Hampshire.

The reservoir is expected to hold around 8.7 million cubic metres of raw water pumped from the Company's existing sources at Havant & Bedhampton Springs. It would be approximately one mile long and half a mile wide.

Water from the reservoir would be treated at the existing Farlington Water Treatment Works on Portsdown Hill, Cosham, although it may be necessary to add some pre-treatment processes at Farlington or on an alternative site.

Demand forecasts carried out by the Company for OFWAT's 2004 periodic review of water charges indicate that the reservoir will be required in service by 2020/21. However, before construction can commence, there are a wide range of issues to be addressed.

The total estimated cost of the scheme is in excess of £30m.

A scheme of this magnitude and impact will require careful management of all the issues involved if the project is to proceed successfully. The Company therefore established a Stakeholder Group in 2004 which it chairs to provide a forum where interested parties can contribute to and be informed of the development and details of the scheme.

Visit www.havantthicketreservoir.co.uk to find out more.

Clay Hill Winter Storage Reservoir – South East Water

South East Water’s last water resource plan, published in 2005, showed there would be a shortfall in available water by 2017, particularly in its Sussex/Kent supply area.

That’s why, since 2006, South East Water has been carrying out feasibility studies into the possibility of building a new reservoir on a site at Clay Hill, near Ringmer, in East Sussex.

The company’s extensive studies have looked at planning, geological, social and environmental issues to determine if the site is suitable for a reservoir.

These will make sure it understands and, where appropriate, protects the environment before developing a new reservoir. The surveys may also identify further social and environmental benefits a new reservoir scheme could deliver.

The studies, and the work on developing the latest plan, has concluded a new reservoir at this location could be the best way of making more water available.

If built, Clay Hill Reservoir would be able to supply, on average, an extra 16.8 million litres of water each day. This would be achieved by abstracting, and then storing, excess winter rainfall from the lower reaches of the River Ouse that would otherwise go out to sea. Storing the water means it can be used when needed.

The development of Clay Hill reservoir is a strategic investment by South East Water and will cost £90 million.

A reservoir at this location would also help support the company’s Eastbourne, West Sussex, and West Kent supply areas because the company will be able to transfer this water through existing interconnecting pipelines.

Visit www.southeastwater.co.uk to find out more.

Broad Oak Winter Storage Reservoir – South East Water

South East Water’s draft water resources plan shows that by 2024 there will be a shortfall in available water in Kent.

South East Water considers the most environmentally and economically sustainable way to meet this shortfall is to build a new winter storage reservoir at Broad Oak, near Canterbury. The company owns the area identified as part of its water resource plan.

Broad Oak Reservoir would be able to supply, on average, an extra 27 million litres of water each day. This would be achieved by abstracting, and then storing, excess winter rainfall from the River Stour that would otherwise go out to sea. Storing the water means it can be used when needed.

The development of Broad Oak Reservoir is a strategic investment by South East Water and will cost £200 million.

A reservoir at this location would also help support the company’s entire Kent supply area, and as far as East Sussex, because it will be able to transfer this water through the new interconnecting pipelines.

Broad Oak Reservoir also provides the greatest opportunity for environmental enhancements and habitat creation.

Visit www.southeastwater.co.uk to find out more.