Puriton Ridge

Overview – Summer 2022

In April 2022, our contractor, Balfour Beatty, finished building 48 of the new T-pylons along a section of the Hinkley connection route between Bridgwater and Loxton. This new milestone is a great engineering achievement ahead of energising the pylons in October 2022.

By using the innovative T-pylon design, the height of the new infrastructure is being reduced by a third compared to an equivalent lattice pylon (35m compared to 48m). The base of the T-pylons also requires less land meaning that their footprint on the ground is significantly reduced.

Reinstatement along the southern section of the connection route started in spring 2022 and will continue through to late 2024.

To reduce the visual impact of the new pylons, National Grid is removing a total of 249 existing pylons and 67 kilometres of existing overhead lines along the full route by 2025. The work to remove 37 kilometres of pylons between Bridgwater and Sandford is underway. 91 pylons will be removed by summer 2022, with the eight closest to Sandford substation programmed for removal next year.

Thank you from everyone working on the project for your patience as we continue our work to deliver electricity safely, efficiently, and reliably, and support the UK’s ambition to achieve net zero by 2050.

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Take a look at our detailed map

Puriton Ridge timeline

Early 2020 to late 2022

 

Build new 400,000 volt overhead line

What we're doing:

  • Building a new overhead line from the existing Hinkley to Melksham overhead line, which is north of Woolavington, northwards to a new cable sealing end (CSE) compound just south of the Mendip Hills. See Mendip Hills for further information about the CSE compound.

  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. You can find more information on our construction information page.

  • In this area, contractors will use the temporary construction compound built north of Tarnock.

  • We will use T-pylons in this area, with the exception of where the overhead line connects to the existing overhead line.

Mid 2021 to mid 2022

 

Remove the existing 132,000 volt overhead line

What we're doing:

  • Removing Western Power Distribution’s existing overhead line from Bridgwater substation to the A368 in Sandford. This will make way for, and minimise the visual impact of the new overhead line.

Mid 2022 to mid 2024

 

Upgrade Hinkley to Bridgwater overhead line

What we're doing:

  • We are upgrading the wires on the existing pylons.

Late 2022 to late 2024

 

Build new 400,000 volt overhead line

What we're doing:

  • Building a new overhead line between the existing Hinkley to Bridgwater overhead line on Horsey Level and the existing Hinkley to Melksham overhead line which is north of Woolavington.

  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. You can find more information on our construction information page.

  • In this area, contractors will use the temporary construction compound built north of Tarnock.

  • We will use T-pylons in this area, with the exception of where the overhead line connects to existing overhead lines. When complete, this will become the new Shurton to Melksham overhead line.

Early 2023 to mid 2024

 

Modify Bridgwater substation

What we're doing:

  • Installing new electrical equipment, which is required as part of the upgrading of the existing Hinkley to Bridgwater overhead line.

  • This work is being carried out within the existing substation boundary and does not require planning permission.

Mid 2023 to mid 2024

 

Build Bridgwater Tee underground cable

This is the point at which the new overhead line connects to the existing Hinkley to Bridgwater overhead line on Horsey Level.

What we're doing:

  • Building a temporary construction compound, and entrance and access road to allow construction traffic to enter site from the A39 Bath Road. You can find more information on our construction information page.

  • Connecting the new overhead line to the existing Hinkley to Bridgwater overhead line on Horsey Level.

  • Removing a small section of the existing Hinkley to Bridgwater overhead line and replacing it with an underground cable. This will enable the overhead line to pass overhead.

  • Building two cable sealing end (CSE) compounds (approximately 34m by 30m) at either end of the underground cable to connect it to the existing overhead line.