Overview – Winter 2023
National Grid started work to build the north section of the Hinkey connection between Sandford and Seabank substations in July 2022.
We’re using 400,000 volt traditional lattice pylons in and around Avonmouth, rather than the T-pylons seen elsewhere on the Hinkley Connection route. At approximately 50 metres high, the lattice design provides the height required across the River Avon and means the 27 new lattice pylons can navigate the tighter turning angles that are needed on the route between the River Avon and Seabank substation.
In February 2022, our contractor, J Murphy and Sons, started work to modify Seabank substation and the existing electricity network, replacing nearby pylons at Crooks Marsh with new underground cables. This work is set to be completed in late 2023.
To make way for the new connection, National Grid is removing 67 kilometres of existing 132,000 volt overhead wires and 249 along the new 400,000 volt connection route.
We removed seven pylons from across the M49 in 2021. Starting this spring, we’ll take down the line of pylons between Portishead and Avonmouth substations, removing pylons from a residential area, including those near Avonmouth C of E Primary School and Daisy’s Nursery.
Thank you from everyone working on the project for your patience and understanding as we progress with this vital work to connect six million homes and businesses to new sources of homegrown, low carbon energy, and help the UK meet its net zero ambitions.
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