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Nuclear tunnel to National Grid planned

Lattice pylon

Final plans for a second route connection from the proposed Wylfa Newydd nuclear power station in Wales to the National Grid have been revealed.

The 4km tunnel will run from the station’s site on the Isle of Anglesey, travelling under the Menai Strait, to connect to the grid. A local community consultation on the plan has opened.

The National Grid is considering both horizontal directional drilling (HDD) and tunnelling options.

Menai strait Tunnel

Menai Strait tunnel

Source: National Grid

“People can now see what the second connection could look like, including the proposed location of pylons and the tunnel under the Menai Strait,” said National Grid project manager Gareth Williams.

“The tunnel under the Strait will be one of the most significant civil engineering projects in Wales in recent years and will involve some of the best engineers in the world. The tunnel will be around 4km long and mean our overhead equipment is beyond the Area of Outstanding Natural Beauty and away from the coast.

“We’ve kept the route for the new overhead line close to the existing line. This means we take a direct route, keep away from larger communities and avoid putting pylons in new areas.”

National Grid’s consultation will run for 10 weeks. It expects to submit a planning application next year.

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