In your area

The Hinkley Connection Project is made up of many different stages, it is a series of interconnected projects taking place over several years.

In all, the connection and its associated infrastructure will take around eight years to build and is expected to be completed by mid-2026. View or download our project-wide construction programme.

During this time we will carry out a range of landscaping, planting and mitigation across the route to reduce the impact of the project.  We will also work closely with landowners to ensure that land is reinstated, and any trees and hedgerows removed during construction are replaced.

Find out what’s happening in your area using the links below or explore our interactive map.

Critical works during the Covid-19 outbreak: The Hinkley Connection Project is a critical national infrastructure project. These are works that have been given government approval to continue to ensure the future running of the network.  Together with our contractors we are progressing with the critical elements of our works.   Read more about the continuation of works and the safety measures we have in place.

 

 

Hinkley Point area

Current Activity

Date From Date To Activity
June 2019 Ongoing

Shurton substation construction

Detail Map

Downloads

Summary of work happening in the Hinkley Point area

Build Shurton substation

What we are doing:

  • Building a new substation within the boundary of the new Hinkley Point C power station complex, so we can connect the new power station to the electricity transmission network.

This was included in EDF Energy’s Development Consent Order which was approved by the Secretary of State in March 2013.

Expected start: Mid 2019
Expected completion: Mid 2023

Modify existing overhead lines in the Hinkley Point area

What we are doing:

  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. Click here for more details.
  • Modifying existing overhead lines in the Hinkley Point area so they connect to the new Shurton substation at Hinkley Point C Power Station.
  • Building a short connection from Shurton substation to the existing substation at Hinkley Point B.

In this location, we are building approximately 4.5 km of new 400,000 volt overhead line (13 lattice pylons) and removing approximately 2.3 km of existing overhead lines (six lattice pylons).

Expected start: Early 2021
Expected finish: Late 2025

Upgrade Hinkley to Bridgwater overhead line

This is the middle of the three lines shown above.

What we are doing:

  • Changing the wires on the existing pylons to upgrade the operating voltage of the line from 275,000 volts to 400,000 volts.

Expected start: Mid 2022
Expected finish: Mid 2024

Projects timeline

(Click the bars to see the information of each project)

2023 Q2 2019 Q2

Build Shurton substation

Building a new 400,000 volt substation within the boundary of the new Hinkley Point C Power Station complex

2025 Q4 2021 Q1

Modify existing overhead lines at Hinkley Point

Modifying existing overhead lines at Hinkley Point so they connect to the new Shurton substation at Hinkley Point C Power Station

2024 Q2 2022 Q3

Upgrade Hinkley to Bridgwater overhead line 

Upgrading the operating voltage of the line from 275,000 volts to 400,000 volts

2018
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2019
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2020
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Puriton Ridge area

Current Activity

Date From Date To Activity
April 2020 May 2020

T- pylons – vegetation clearance and local traffic management

May 2020 Late 2022

T-pylons – construction

Detail Map

Downloads

Summary of work happening in the Puriton Ridge area

Build new 400,000 volt overhead line  

What we are doing:

  • Building a new overhead line from the existing Hinkley to Melksham overhead line, which is north of Woolavington, northwards to a new cable sealing end (CSE) compound just south of the Mendip Hills. See Mendip Hills for further information about the CSE compound.
  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. Click here for more details.
  • In this area, contractors will use the temporary construction compound built north of Tarnock.

We will use T-pylons in this area, with the exception of where the overhead line connects to the existing overhead line.

Expected start: Early 2020
Expected finish: Late 2022

Remove the existing 132,000 volt overhead line

What we are doing:

  • Removing Western Power Distribution’s existing overhead line from Bridgwater substation to the A368 in Sandford. This will make way for, and minimise the visual impact of the new overhead line.

Expected start: Mid 2021
Expected finish: Mid 2022

Upgrade Hinkley to Bridgwater overhead line

What we are doing:

  • We are upgrading the wires on the existing pylons.

Expected start: Mid 2022
Expected finish: Mid 2024

Build new 400,000 volt overhead line

What we are doing:

  • Building a new overhead line between the existing Hinkley to Bridgwater overhead line on Horsey Level and the existing Hinkley to Melksham overhead line which is north of Woolavington.
  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. Click here for more details.
  • In this area, contractors will use the temporary construction compound built north of Tarnock.

We will use T-pylons in this area, with the exception of where the overhead line connects to existing overhead lines. When complete, this will become the new Shurton to Melksham overhead line.

Expected start: Late 2022
Expected finish: Late 2024

Modify Bridgwater substation

What we are doing:

  • Installing new electrical equipment, which is required as part of the upgrading of the existing Hinkley to Bridgwater overhead line.
  • This work is being carried out within the existing substation boundary and does not require planning permission.

Expected start: Early 2023
Expected finish: Mid 2024

 Build Bridgwater Tee underground cable

This is the point at which the new overhead line connects to the existing Hinkley to Bridgwater overhead line on Horsey Level.

What we are doing:

  • Building a temporary construction compound, and entrance and access road to allow construction traffic to enter site from the A39 Bath Road. Click here for more details.
  • Connecting the new overhead line to the existing Hinkley to Bridgwater overhead line on Horsey Level.
  • Removing a small section of the existing Hinkley to Bridgwater overhead line and replacing it with an underground cable. This will enable the overhead line to pass overhead.
  • Building two cable sealing end (CSE) compounds (approximately 34m by 30m) at either end of the underground cable to connect it to the existing overhead line.

Expected start: Mid 2023
Expected finish: Mid 2024

Projects timeline

(Click the bars to see the information of each project)

2022 Q2 2020 Q1

Build new 400,000 volt overhead line

Between the existing Hinkley to Melksham overhead line, north of Woolavington, northwards to a cable sealing end compound south of the Mendip Hills.

2022 Q2 2021 Q2

Remove the existing 132,000 volt overhead line

Removing Western Power Distribution’s existing 132,000 volt overhead line from Bridgwater Substation to the A368 in Sandford

2024 Q2 2022 Q3

Upgrade Hinkley to Bridgwater overhead line

Changing the wires on the existing pylons and upgrading the operating voltage of the line from 275,000 volts to 400,000 volts

2024 Q4 2022 Q4

Build new 400,000 volt overhead line

Between the existing Hinkley to Bridgwater overhead line on Horsey Level and the existing Hinkley to Melksham overhead line

2024 Q3 2023 Q1

Modify Bridgwater substation

Installing new electrical equipment, required as part of the upgrading of the existing Hinkley to Bridgwater overhead line

2024 Q3 2023 Q3

Build Bridgwater Tee underground cable

Removing a small section of the existing Hinkley to Bridgwater overhead line and replacing it with an underground cable

2018
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2019
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2020
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2021
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East Huntspill to Mendips

Current Activity

Date From Date To Activity
April 2020 May 2020

T- pylons – vegetation clearance and local traffic management

May 2020 Late 2022

T-pylons – construction

April 2020 Ongoing

Underground cable through Mendips AONB – construction

Detail Map

Downloads

Summary of work happening between East Huntspill and the Mendips

Build and access temporary haul road and construction compounds

We are building two temporary construction compounds and a temporary entrance and access road off the A38, north of Tarnock, to allow construction traffic to enter the site from the local highway. Work will start on the access and compounds in 2019.

One of the compounds will includes site offices and internal and external storage facilities to support the work to build a 400,000 volt underground cable across the Mendip Hills Area of Outstanding Natural Beauty (AONB).

The other temporary site compound will be used for the construction of the 400,000 volt overhead line and removal of the existing 132,000 volt overhead line in the area.

Expected start: Early 2019

Expected finish: Mid 2024

Build new 400,000 volt overhead line  

What we are doing:

  • Building a new overhead line from the existing Hinkley to Melksham overhead line, which is north of Woolavington, northwards to a new cable sealing end (CSE) compound just south of the Mendip Hills. See Mendip Hills for further information about the CSE compound.

We will use T-pylons in this area, with the exception of where the overhead line connects to the existing overhead line.

Expected start: Early 2020
Expected finish: Late 2022

Remove existing 132,000 volt overhead line

What we are doing:

  • Removing Western Power Distribution’s overhead line from Bridgwater substation to the A368 in Sandford. This will make way for, and minimise the visual impact of the new overhead line.

Expected start: Mid 2021
Expected finish: Mid 2022

Projects timeline

(Click the bars to see the information of each project)

2024 Q1 2019 Q1

Build and access temporary haul road and site compounds

Building and accessing temporary haul road and site compounds for the Mendips underground cable work and 400,000 volt overhead line build

2022 Q1 2020 Q1

Build new 400,000 volt overhead line 

Building a new 400,000 volt overhead line from the existing Hinkley to Melksham overhead line, northwards to a new cable sealing end compound just south of the Mendip Hills

2022 Q2 2021 Q1

Remove existing 132,000 volt overhead line

Removing Western Power Distribution’s 132,000 volt overhead line from Bridgwater substation to the A368 in Sandford

2018
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2019
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2020
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2021
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2022
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Mendip Hills

Current Activity

Date From Date To Activity
January 2020 March 2020

Underground cable through Mendips AONB – River Axe footpath closure

February 2020 April 2020

Underground cable through Mendips AONB – Castle Hill temporary traffic lights

April 2020 May 2020

T- pylons – vegetation clearance and local traffic management

May 2020 Late 2022

T-pylons – construction

Detail Map

Downloads

Summary of work happening in the Mendip Hills

Build Mendip Hills 400,000 volt underground cable

Work started in this area in April 2019. For more detailed information please visit our Live Projects page.

What we are doing:

  • Advance landscaping and planting around the location of the new cable sealing end (CSE) compound.
  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. Click here for more details.
  • Installing a temporary site office and temporary construction compound north of Tarnock and up to four secondary temporary construction compounds along the route to minimise traffic movements on site. One of these secondary compounds will be located immediately south of the new CSE compound.
  • Constructing a new CSE compound east of the M5 motorway to the south of the Mendip Hills Area of Outstanding Natural Beauty (AONB) and the River Axe.
  • Laying 8.5 km of 400,000 volt underground cables from the CSE compound south of the Mendip Hills AONB northwards to the new Sandford substation.

Expected start: Early 2019
Expected finish: Early 2024

Remove existing 132,000 volt overhead line

What we are doing:

  • Removing Western Power Distribution’s overhead line from Bridgwater Substation to the A368 in Sandford. This will make way for, and minimise the visual impact of the new overhead line.

Expected start: Mid 2021
Expected finish: Mid 2022

Projects timeline

(Click the bars to see the information of each project)

2024 Q2 2019 Q1

Build Mendip Hills 400,000 volt underground cable

Constructing a new CSE compound east of the M5 motorway and laying 8.5 km of 400,000 volt underground cables through the Mendip Hills AONB

2022 Q2 2021 Q2

Remove existing 132,000 volt overhead line

Removing Western Power Distribution’s 132,000 volt overhead line from Bridgwater Substation to the A368 in Sandford

2018
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2019
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2020
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2021
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Sandford

Current Activity

Date From Date To Activity
March 2020 Ongoing

Sandford substation – construction

January 2020 Ongoing

T- pylons – surveys, ecological mitigation and local traffic management

Detail Map

Downloads

Summary of work happening in Sandford

Build Sandford substation

What we are doing:

  • Advance planting and landscaping.
  • Installing a temporary construction compound adjacent to the site of the new substation.
  • Building a new substation, just north of the A368, in order to maintain local electricity supplies in the area.

Expected start: Mid 2020
Expected finish: Early 2024

Build a new 400,000 volt overhead line

What we are doing:

  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. Click here for more details.
  • Building a new overhead line from Sandford substation to Seabank substation (approximately 31.2 km).

We will use T-pylons in this area.

Expected start: Late 2020
Expected finish: Mid 2025

Remove existing 132,000 volt overhead line

What we are doing:

  • Removing Western Power Distribution’s overhead line from the A368 in Sandford to Avonmouth. This will make way for, and minimise the visual impact of the new overhead line.
  • Removing approximately 1.5 km of the existing overhead line to Weston-super-Mare.

Expected start: Late 2020
Expected finish: Mid 2025

Build a new connection to the existing 132,000 volt overhead line to Weston-super-Mare

What we are doing:

  • Installing a temporary construction compound north of Sandford substation.
  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. Click here for more details.
  • Building a new connection from Sandford substation to the existing overhead line that goes to Weston-super-Mare. Approximately 700m of cable near the substation will be buried underground to allow the new overhead line to pass overhead. This is to ensure local electricity supplies are maintained.
  • Building a temporary overhead line to divert electricity away from the working area.

This work will be done by Western Power Distribution.

Expected start: Mid 2022
Expected finish: Mid 2023

Build a new connection to the existing 132,000 volt overhead line to Churchill

  • Building a new overhead line (285m) between the new Sandford substation and the existing overhead line that goes to Churchill, to ensure local electricity supplies are maintained.
  • Building a temporary overhead line to divert electricity away from the working area.
  • Removing approximately 550m of the existing overhead line to Churchill.

This work will be done by Western Power Distribution.

Expected start: Early 2023
Expected finish: Late 2023.

Projects timeline

(Click the bars to see the information of each project)

2024 Q1 2020 Q2

Build Sandford substation

Constructing a new substation, just north of the A368, in order to maintain local electricity supplies in the area

2025 Q2 2020 Q4

Build a new 400,000 volt overhead line

Building a new 400,000 volt overhead line from Sandford substation to Seabank substation (approximately 31.2 km)

2025 Q2 2020 Q4

Remove existing 132,000 volt overhead line

Removing Western Power Distribution’s 132,000 volt overhead line from the A368 in Sandford to Avonmouth

2023 Q2 2022 Q2

Build a new connection to the existing 132,000 volt overhead line to Weston-super-Mare

Building a new 132,000 volt connection from Sandford substation to the existing 132,000 volt overhead line that goes to Weston-super-Mare

2023 Q4 2023 Q1

Build a new connection to the existing 132,000 volt overhead line to Churchill

Building a new 132,000 volt overhead line between the new Sandford substation and the existing overhead line that goes to Churchill

2018
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2019
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2020
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2021
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Churchill

Current Activity

Date From Date To Activity
May 2019 Spring 2020

Electricity network modifications – commissioning and reinstatement

Detail Map

Downloads

Summary of work happening at Churchill

Upgrade Churchill substation

Work at Churchill Substation began in June 2018.  For more detailed information please visit our Live Projects page.

What we are doing:

  • Upgrading the existing substation and installing new electrical equipment, which will enable the connection of the overhead lines to the east of the substation.

This work will be done by Western Power Distribution.

Expected start: Mid 2018
Expected finish: Early 2020

Modify the existing 132,000 volt overhead lines to the east of Churchill substation

What we are doing:

  • Building a small temporary construction compound and temporary entrances and access roads to allow construction traffic to enter site from the local highway.
  • Connecting Churchill Substation to the existing overhead line to the east.
  • Installing a small section of underground cable and replacing an existing pylon with a new cable sealing end (CSE) pylon to join the existing overhead line to the new underground cable.

This work will be done by Western Power Distribution.

Expected start: Mid 2019
Expected finish: Early 2020

The work at Churchill will maintain and reinforce the security of the electricity network in the South West, following the removal of the 132,000 volt overhead line from Bridgwater to Avonmouth.  

Projects timeline

(Click the bars to see the information of each project)

2020 Q1 2018 Q2

Upgrade Churchill substation

Upgrading the existing substation and installing new electrical equipment, which will enable the connection of the overhead line to the east of the substation

2020 Q1 2019 Q2

Modify the existing 132,000 volt overhead line to the east of Churchill substation

Connecting Churchill substation to the existing 132,000 volt overhead line to the east

2018
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2019
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2020
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2021
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2026
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Puxton to Kenn

Current Activity

Date From Date To Activity
January 2020 Ongoing

T- pylons – surveys, ecological mitigation and local traffic management

Detail Map

Downloads

Summary of work happening between Puxton and Kenn

Build a new 400,000 volt overhead line

What we are doing:

  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. Click here for more details.
  • Building a new overhead line from Sandford substation to Seabank substation (approximately 31.2 km).

We will use T-pylons in this area.

Expected start: Late 2020
Expected finish: Mid 2025.

Remove the existing 132,000 volt overhead line

What we are doing:

  • Removing Western Power Distribution’s overhead line from the A368 in Sandford to Avonmouth. This will make way for and minimise the visual impact of the new connection.

Expected start: Late 2020
Expected finish: Mid 2025

Projects timeline

(Click the bars to see the information of each project)

2025 Q2 2020 Q4

Build a new 400,000 volt overhead line

Building a new 400,000 volt overhead line from Sandford substation to Seabank substation

2025 Q2 2020 Q4

Remove the existing 132,000 volt overhead line

Removing Western Power Distribution’s 132,000 volt overhead line from the A368 in Sandford to Avonmouth

2018
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2019
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2020
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2021
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2026
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Nailsea to Tickenham

Current Activity

Date From Date To Activity
January 2020 September 2021

Underground cable – construction

April 2020 Ongoing

Underground cable – Clevedon Road, Washing Pound Lane, Church Lane and Whitehouse Lane

January 2020 Ongoing

T- pylons – surveys, ecological mitigation and local traffic management

Detail Map

Downloads

Summary of work happening between Nailsea and Tickenham

Underground the 132,000 volt overhead line between Nailsea and Portishead substation

What we are doing:

  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. Click here for more details.
  • Building temporary construction compounds. The main construction compound will be on land adjacent to Engine Lane.
  • Building a underground cable between Nailsea and Portishead substation.
  • Building a pylon to connect the existing overhead line at Nailsea to the new underground cable.
  • Building a temporary overhead line at Nailsea to divert electricity away from the working area.

This new underground cable section is being built as a direct result of feedback received during our consultation. It will enable us to completely remove the existing 132,000 volt overhead line that currently runs very close to people’s properties.

Expected start: Early 2020
Expected finish: Mid 2022

Build new 400,000 volt overhead line

What we are doing:

  • In this area, to minimise disruption, we will be sharing temporary construction compounds, and temporary entrances and access roads built for other elements of the build.
  • Building a new overhead line from Sandford substation to Seabank substation (approximately 31.2 km).

We will use T-pylons in this area.

Expected start: Late 2020
Expected finish: Mid 2025.

Remove existing 132,000 volt overhead lines

What we are doing:

  • Removing Western Power Distribution’s overhead line from the A368 in Sandford to Avonmouth, which will make way for, and minimise the visual impact of the new connection.
  • Removing approximately 9 km of an existing overhead line between Nailsea and Portishead substation that currently runs very close to people’s properties. This is a direct result of feedback received during our consultation.

Expected start: Late 2020
Expected finish: Mid 2025

Projects timeline

(Click the bars to see the information of each project)

2022 Q2 2020 Q1

Underground the 132,000 volt overhead line between Nailsea and Portishead substation

Building a 132,000 volt underground cable between Nailsea and Portishead substation

2025 Q2 2020 Q4

Build new 400,000 volt overhead line

Building a new 400,000 volt overhead line from Sandford Substation to Seabank substation 

2025 Q2 2020 Q4

Remove existing 132,000 volt overhead lines

Removing 132,000 volt overhead line from Sandford to Avonmouth and between Nailsea and Portishead substation

2018
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2019
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2020
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2021
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2026
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Tickenham to Portishead

Current Activity

Date From Date To Activity
January 2020 September 2021

Underground cable – construction

February 2020 April 2020

Underground cable – Sheepway constructing temporary accesses

2018 2025

Portbury Wharf Nature Reserve

January 2020 Ongoing

T- pylons – surveys, ecological mitigation and local traffic management

Detail Map

Downloads

Summary of work happening between Tickenham and Portishead

Underground the 132,000 volt overhead line between Nailsea and Portishead Substation

What we are doing:

  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. Click here for more details.
  • Building temporary construction compounds. The main construction compound will be on land adjacent to Engine Lane.
  • Building a 132,000 volt underground cable between Nailsea and Portishead Substation.
  • Installing a Cable Sealing End (CSE) pylon to connect the existing overhead line at Nailsea to the new underground cable.
  • Building a temporary overhead line at Nailsea to divert electricity away from the working area.

This new underground cable section is being built as a direct result of feedback received during our consultation. It will enable us to completely remove the existing 132,000 volt overhead line that currently runs very close to people’s properties.

Expected start: Early 2020
Expected finish: Mid 2022

 

Build new 400,000 volt overhead line

What we are doing:

  • In this area, to minimise disruption, we will be sharing temporary construction compounds, and temporary entrances and access roads built for other elements of the build.
  • Building a new 400,000 volt overhead line from Sandford Substation to Seabank Substation (approximately 31.2km).

We will use T-pylons in this area.

Expected start: Late 2020
Expected finish: Mid 2025

 

Remove existing 132,000 volt overhead line

What we are doing:

  • Removing Western Power Distribution’s 132,000 volt overhead line from the A368 in Sandford to Avonmouth, which will make way for, and minimise the visual impact of the new 400,000 volt connection.
  • Removing approximately 9km of an existing 132,000 volt overhead line between Nailsea and Portishead Substation that currently runs very close to people’s properties. This is a direct result of feedback received during our consultation.

Expected start: Late 2020
Expected finish: Mid 2025

 

Modify Portishead Substation and overhead line to the east of the substation

What we are doing:

  • Making changes to the inside of Portishead Substation to enable the connection of the new 132,000 volt underground cable from Nailsea.
  • Building a temporary construction compound to the east of the substation.
  • Building temporary entrances and access roads to allow construction traffic to enter the undergrounding site from the local highway. Click here for more details.
  • Removing a small section of 132,000 volt overhead line to the east of the substation and replacing it with a small section of 132,000 volt underground cable. This will enable the 400,000 volt overhead line to pass safely overhead.
  • Building a temporary overhead line to divert electricity away from the working area.
  • Installing a Cable Sealing End (CSE) pylon to connect the new underground cable to the existing overhead line.

This work will be done on our behalf by Western Power Distribution.

Expected start: Late 2020
Expected finish: Late 2022

 

Projects timeline

(Click the bars to see the information of each project)

2022 Q2 2020 Q1

Underground the 132,000 volt overhead line between Nailsea and Portishead Substation

Building a 132,000 volt underground cable between Nailsea and Portishead substation

2025 Q2 2020 Q4

Build new 400,000 volt overhead line

Building a new 400,000 volt overhead line from Sandford substation to Seabank substation

2025 Q2 2020 Q4

Remove existing 132,000 volt overhead line

Removing Western Power Distribution’s 132,000 volt overhead line from the A368 in Sandford to north of Avonmouth substation

2022 Q4 2020 Q4

Modify Portishead Substation and overhead line to the east of the substation

Modifying Portishead substation and undergrounding a small section of overhead line to the east of the substation

2018
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2019
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2020
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2021
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2022
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2023
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2024
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2026
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Avonmouth

Current Activity

Date From Date To Activity
March 2019 Ongoing

Avonmouth substation modifications and replacing overhead line with underground cable

March 2019 Ongoing

Traffic management at Avonmouth

January 2020 Ongoing

T- pylons – surveys, ecological mitigation and local traffic management

Detail Map

Downloads

Summary of work happening in Avonmouth

Modify Avonmouth substation and existing overhead line to the east of the substation

For more detailed information please visit our Live Projects page.

What we are doing:

  • Building a temporary construction compound to the east of the substation.
  • Building temporary entrances and access roads to allow construction traffic to enter the undergrounding site from the local highway. Click here for more details.
  • Replacing a small section of an overhead line to the north of the substation with a small section of an underground cable. This will enable the overhead line to pass safely overhead.
  • Building a pylon to connect the underground cable to the overhead line.
  • Making changes inside Avonmouth substation to enable the connection of the new underground cable.

This work will be done by Western Power Distribution.

Expected start: Early 2019
Expected finish: Mid 2020

Modify Seabank 132,000 volt substation and the existing overhead lines at Seabank

What we are doing:

  • Building a temporary construction compound and temporary entrances and access roads to allow construction traffic to enter the undergrounding site from the local highway.
  • Undergrounding a small section of the three existing overhead lines at Seabank. This will enable the new overhead line to pass safely overhead.
  • Building three pylons to connect the existing overhead lines to underground cables.
  • Modifying Seabank substation to enable the connection of the new underground cables.
  • Removing the existing overhead lines that are no longer needed in this area.

This work will be done by Western Power Distribution.

Expected start: Mid 2020
Expected finish: Late 2020

Build new 400,000 volt overhead line

What we are doing:

  • Building temporary entrances and access roads to allow construction traffic to enter site from the local highway. Click here for more details.
  • Building a new overhead line from Sandford substation to Seabank substation (approximately 31.2 km).

In this area, we will use a mix of steel lattice pylons and T-pylons.

Expected start: Late 2020
Expected finish: Mid 2025.

Remove the existing 132,000 volt overhead line

What we are doing:

  • Removing Western Power Distribution’s overhead line from the A368 in Sandford to Avonmouth substation, which will make way for, and minimise the visual impact of, the new connection.
  • Removing a small section of the existing overhead line to the east of Avonmouth substation.

Expected start: Late 2020
Expected finish: Mid 2025

Modify Seabank 400,000 volt substation

What we are doing:

  • Extending the existing substation to enable the connection of the new overhead line.
  • Modifying the existing site access road.
  • Removing unnecessary electrical equipment.
  • Installing a perimeter flood defence wall with flood gates around the substation to help guard against tidal flood risk.

Expected start: Mid 2022
Expected finish: Mid 2025

Projects timeline

(Click the bars to see the information of each project)

2020 Q3 2019 Q1

Modify Avonmouth substation and existing overhead line to the east of the substation

Modifying Avonmouth substation and undergrounding a small section of 132,000 volt overhead line to the north of the substation

2020 Q4 2020 Q2

Modify Seabank 132,000 volt substation and the existing overhead lines at Seabank

Undergrounding a small section of the three existing 132,000 volt overhead lines at Seabank and modifying Seabank substation

2025 Q2 2020 Q4

Build new 400,000 volt overhead line

Building a new 400,000 volt overhead line from Sandford substation to Seabank substation

2025 Q2 2020 Q4

Remove the existing 132,000 volt overhead line

Removing Western Power Distribution’s 132,000 volt overhead line from the A368 in Sandford to north of Avonmouth Substation

2025 Q2 2022 Q3

Modify Seabank 400,000 volt substation

Extending the existing 400,000 volt substation to enable the connection of the new 400,000 volt overhead line

2018
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2019
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2020
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2021
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2026
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