Scheduled pylon maintenance in Snowdonia

As part of ongoing routine maintenance of our electricity transmission infrastructure, we have recently begun a programme of repainting on a number of pylons that run through the Snowdonia National Park.

June 2017

This includes repainting some of the pylons in the section of overhead line running across the Dwyryd Estuary between Garth and Cilfor.  This section of overhead line has been earmarked for potential removal as part of National Grid’s Visual Impact Provision (VIP) project.

Under the VIP project, the overhead line would be replaced with an underground solution, passing beneath the Dwyryd Estuary through a tunnel.  We are currently in the process of developing our proposals for this project, including carrying out detailed survey work, in advance of a planning application being submitted to Gwynedd Council in winter 2018.

The current indicative programme is that, subject to all necessary negotiations, approvals and consents, work would commence on site in 2021, taking approximately three years to complete.  The pylons and overhead line would remain in operation throughout construction and would not be due for removal until the underground replacement has been completed and is fully operational.

It is likely therefore that the pylons would not be removed until 2024.  We need to ensure that the pylons remain in full working order until this date.  This includes making sure that they are painted with a protective coating to minimise the impact of exposure to the weather and corrosive salt water, particularly vital given the coastal environment in which they are located.

The work is being undertaken by CLC, specialist contractors acting on National Grid’s behalf and is anticipated to be complete by the end of 2017.

If you have any questions about the maintenance work or the Visual Impact Provision project please contact us on freephone 0800 019 1898.