Chesterfield

We propose to build and operate a new 400 kV substation to the south of our existing site off Calow Lane in Cock Alley, near Chesterfield in Derbyshire.

The new substation would be within a compound of approximately 150 metres x 210 metres, the size of around 3 football pitches, and include a new Gas Insulated Switchgear Hall building, as well as up to three new supergrid transformers, which increase or decrease the voltage of electricity between different circuits.

The highest structures within the substation compound would be six overhead line gantries, at approximately 12 metres, which are bridge-like structures with platforms used to support equipment and cabling.

We also propose a temporary diversion of the Chesterfield to High Marnham overhead electricity line, with temporary pylons during construction.

Once we've built the new 400 kV substation, we'll remove three pylons and replace them with another three to the south of our existing site.