Eltham

The Eltham team are building a permanent shaft and headhouse to receive the tunnel boring machines (TBMs) from our existing substation sites at New Cross and Hurst. The shaft and headhouse will be used for ventilation and as a permanent access route for the tunnel once it is built.

One of our TBMs has been making good progress, mining from Hurst to Eltham, and is set to break through at our Eltham site in late June. As such, from Monday 20 June 2022, we will start working 24/7, which will last until November 2022.

This new working schedule will allow us to install a lift for site staff to access the bottom of the shaft in preparation for the arrival of the TBM. This work will take one week.

Following the TBM’s breakthrough, we will:

  • continue working the 24/7 shift pattern to lift out the TBM from the shaft
  • start cleaning works in the tunnel to prepare it for cable installation
  • install a monorail network in the tunnel, which will allow operatives to inspect the cables remotely.

During night shifts, cranes will not be in use and there will be some vehicle movements for staff when shifts change. As most of the works will be taking place inside the tunnel, disruption to residents should be limited.

Eltham

 

Overview:

Our site at Eltham is located on Rochester Way, north of Falconwood railway station. We will be building a permanent shaft and headhouse at this site in order to receive the tunnel boring machines from our existing substation sites at New Cross and Hurst. The shaft and headhouse will be used for ventilation and as a permanent access route for the tunnel once it is built.

We are building the tunnels and shafts under our permitted development rights. There are points along the tunnel route where we need to build headhouses to cover the shafts. Headhouses are required for ventilation and as a permanent point of access for the tunnel once it is built.

Our application to the Royal Borough of Greenwich to build a headhouse at our site in Eltham was approved in February 2019, as well as a temporary access route from Welling Way, across Falconwood Field.

The submission of our planning application followed a series of public information events we held at various locations across our route in 2018, where members of the public found out more about our works and the wider project and gave us some helpful feedback.

Key milestones achieved at Eltham:

  • Held public information events in 2018 about the shaft and headhouse
  • Application to build a headhouse at our site in Eltham was approved by the Royal Borough of Greenwich Council in February 2019.
  • Completed building the temporary haul road from Welling Way, across Falconwood Field, in September 2021. The new haul road will help avoid disruption to local residential roads.

Working Hours:

  • Our usual working hours at Eltham are 8am - 6pm Monday to Friday, and 8am to 1pm on Saturdays.
  • There will be no work on Sundays or Bank Holidays.
  • Occasional out of hours work may be necessary and we will keep you informed about this.

Key facts:

  • Dimensions: The shaft will be approximately 15m in diameter and will reach a depth of approximately 40m. The headhouse will have a maximum footprint of 15m by 15m and will reach a maximum height of 10m.
  • Traffic movements: We anticipate there will be approximately 16 HGV movements per day during shaft construction, and 4 per week during headhouse construction.
  • Access: Our construction vehicles will use Rochester Way to enter and leave the site, before joining the A2.

Timeline:

  • Shaft construction works took place between October 2021 and May 2022.
  • Following the TBM breakthrough from Hurst in June 2022, we plan to recover the TBM, clean out the tunnel (Eltham to Hurst Tunnel) and install brackets and monorail in the tunnel from Eltham to Hurst. These activities will run from June 2022 to November 2022.
  • Cable installation in the Eltham to Hurst tunnel will take place by mid-2023. The shaft will then be prepped again for a second TBM arriving from New Cross to Eltham.
  • A permanant headhouse will be built constructed by March 2025.

 

Field worker inside london power tunnels

Contact us

If you would like to discuss the project in greater detail or have any questions, please contact our community relations team using the details below:

Call our Freephone helpline number: 0800 783 2855 (lines open 9am to 5pm, Monday to Friday)

Email: [email protected]

Write to: FREEPOST NATIONAL GRID