The project is part of the Visual Impact Provision project in the Snowdonia National Park near Porthmadog in the north of the country.
This seven-year project will see the construction of two shafts and 3.4 kilometres of tunnel to carry electricity under the Dwyryd Estuary. The project has been developed to reduce the visual impact of National Grid’s overhead line across the estuary.
This is HOCHTIEF’s second tunnelling project for National Grid. The Group is currently in joint venture for the delivery of the 32 kilometres of tunnels for the supply of electricity in London. HOCHTIEF has a strong track record delivering tunnel projects in the UK. In Sweden, the Group is currently building a 14-kilometers power supply tunnel below the city of Stockholm.