Print this Page
Preston 32 UIDs
These projects are currently in the very early stages of design and are subject to change. However we understand that construction work on this scale can cause concern for residents and we want to assure you the work will be carried out with the minimum of disruption. We will update this site as the project develops.
Why does this work need to happen?
European Legislation / Consent – The Environment Agency (EA) policy on UIDs stems from a number of European Directives. They include:
- Bathing waters (1976, 2006)
- Freshwater Fish Directive (1978, 2006)
- Shellfish Waters Directive (1979, 2006)
- Urban Wastewater Treatment Directive (1991)
- Habitats Directive
We are required to comply with the consent enforced by The Environment Agency. A summary of the conditions shown on The Environment Agency website include:
- No more than three spills per bathing season agglomerated
- No more than ten spills per annum agglomerated
- Spills to be screened to 6mm.
How are we going to meet the legislation targets?
Storm Water Storage Tank – Stores storm water during periods of heavy rain and is constructed underground. Once the rain subsides the contents of the tank are returned to the sewer and go to the treatment works for treatment in the usual way.
Static Screens – During storm conditions and when the storm tanks are full the static screens act as a sieve to prevent larger particles from being discharged into the River Ribble. Particles larger than 6mm are prevented from entering the river by the screens. When the storm subsides the solids are returned to the sewer and are treated in the normal way.
Powered Screens - This type of screen act in the same was as a static screen but are mechanical and rotate.
As the majority of the screens and tanks will be built underground, once completed there will be very little visible from ground level. On some sites there will be control kiosks but on other sites there will be no above ground apparatus.
Where is the work taking place?
The Projects are split into five geographical areas as follows. To find out more about the projects click on the links below.