Polypipe Wind Park Drainage Solution

A new on-shore wind park is set to benefit from an agricultural drainage solution utilising Landcoil from Polypipe, the UK’s leading manufacturer of sustainable drainage and water management products.

Located between the Leicestershire villages of Willoughby-on-the-Wolds and Old Dalby, the site will have the potential to generate enough electricity to power as many as 5,000 homes per year courtesy of nine wind turbines constructed by leading green energy supplier Ecotricity.

The project, which was overseen by Robert Cole Civil Engineering Ltd, the chosen Main Contractor, and agricultural land drainage contractor Lincolnshire Drainage Company Ltd, has seen some of the space around the wind turbines being taken up by site access roads, while the vast majority of land will continue to be used for agricultural purposes.

Although the site had an existing land drainage system in place, the location of the new wind turbines rendered the current system redundant, creating a need for a new system to be installed. For this over 2,000m of Polypipe’s Landcoil agricultural drainage system was installed by Lincolnshire Drainage Company Ltd, in a variety of diameters between 80mm – 160mm, to reduce the risk of water logging in the immediate vicinity of the turbines. The new system incorporates ‘header’ drains installed adjacent to the site’s access roads and intercepts outfall from the existing system, diverting water into a new outfall.

To speed up the removal of excess water from the land, the Landcoil system was installed beneath 40mm of clean washed gravel to allow for quicker infiltration into the drainage system.

The Landcoil pipes were connected together with integral couplers to securely join the pipes together within the system. The three lug design allows for an easy installation, whilst removing the possibility of the coils pulling away from each other during the installation process. More than 30 Landcoil Multi-Junction connectors were also used to connect the different diameters within the system together across the site.

Due to the turbines being installed within agricultural land, Landcoil provides an effective sub-surface drainage system to remove excess water from the soil, with the use of a perforated wall to allow water to enter the system before being carried away. This minimises the risk of the ground from becoming saturated during heavy periods of rainfall allowing for better drained soils, which aid in faster cultivations, spraying and harvesting of the land to increase crop yield.

Speaking of the project, George Firth, Site Manager at Lincolnshire Drainage Company Ltd, said: "We design drainage systems that are intended to last for decades, and as such we need products that are not only easy to install, but will stand the test of time.

"With projects such as this one it’s also important to us that we don’t take any risks with our material selection and use trusted and reliable products. It’s for all of these reasons that we continue to work with Polypipe and specify BSI Kitemarked systems like Landcoil."

Date: 04 November 2015