SP Energy Networks to deliver a £13 million Electricity Network Upgrade for Trawsfynydd


Engineers from SP Energy Networks are set to begin a major £13 million reinforcement project on the electricity network in the Trawsfynydd area of North Wales, designed to boost electricity supplies to more than 45,000 homes and businesses in the area.

The major project consists of a number of elements. The company is installing around 6km of underground 33,000 volt cable from Maentwrog towards Gellilydan, with the vast majority of the civil installation along the A496 already complete. Beyond this a new 132,000 volt cable will be laid underground from Trawsfynydd grid substation, again towards Gellilydan. At the existing Maentwrog grid substation an additional 60MVA grid transformer will be installed.

Initial preparations for the project will begin this week (w/c 29th June), with major construction starting in August. The full project is scheduled for completion in the autumn of 2016.

Mark Sobczak, Head of 132kV Programmes for SP Energy Networks, said: “This is one of the largest upgrades to the electricity infrastructure in the Trawsfynydd area for a number of decades. It is designed to make the network more robust and reliable. By adding additional cables and reinforcing the main substation, the network becomes more secure which aims to reduce faults, and make it quicker to restore supplies if we do experience any issues.

“We will be doing all that we can to ensure that any inconvenience is kept to a minimum during the project, and we have been working with a range of stakeholders in the area since 2014 to plan and agree our work. Meetings have been held with Gwynedd Council, Snowdonia National Park, Natural Resources Wales and local landowners to agree and secure routes for the underground cables and associated works.”

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