In pictures: Mendip Hills AONB

Installing underground cables through the area of oustanding natural beauty

As part of the Hinkley Connection Project, we are installing 8.5 km of 400,000 volt underground cables from our new cable sealing end (CSE) compound at Loxton, south of the Mendip Hills Area of Outstanding Natural Beauty, north towards the new Sandford substation.

The cable pull is over half way there and progressing well.  “We’re delighted with progress and are really making the most of the better weather during the summer months when the ground conditions are most favourable,” says Project Engineer, Robbie Griggs.

There’s a real momentum on the project

“There is a real buzz and momentum on the project – we’ve got the jointers and other teams on site now, running at around 15,000 man hours per month – and are well over 50% there in terms of the cable pull, having pulled 63,795m since we started in February,” adds Robbie.

This photo gallery gives an insight into the complex engineering involved.

 

 

The 400kV cable drums are transported to site

The 400kV cable drum and laying operative for scale

The cable is pulled directly from the specially designed trailer on site

Cable pulling operative at the controls

Groundworks at Loxton CSE compound where the overhead lines will join the 400kV underground cable

Gantries at Loxton CSE compound where the overhead lines will join the underground cables under the Mendip Hills AONB

Cable sections are connected together in joint bays

Connecting the cable sections must be done in a clean environment - jointers tents prevent dust and other materials contaminating the joint

Part of the undergrounding is achieved with Horizontal Directional Drilling (HDD)

Part of the undergrounding is achieved with Horizontal Directional Drilling (HDD), for example under roads, where ground conditions permit

The HDD exit point is achieved with pin point accuracy

The HDD exit point is achieved with pin point accuracy

Ducts used for Horizontal Directional Drilling