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London Power Tunnels

Question for Department for Energy and Climate Change

UIN 37258, tabled on 18 May 2016

To ask the Secretary of State for Energy and Climate Change, what the total length is of tunnels for each specific diameter being constructed by the London Power Tunnels Project; and what length of each such type of tunnel has been constructed to date.

Answered on

26 May 2016

National Grid has said that:

The total length of the tunnels is 32km and tunnelling was completed in March 2015.

19.6km of the network was constructed using a 3m internal diameter tunnel boring

machine

  • Willesden to St John’s Wood 3m diameter tunnel – 7.4km

  • Wimbledon to Kensal Green 3m diameter tunnel – 12.2km.

    12.4km of the network was built using a 4m internal diameter tunnel boring machine

    - St John’s Wood to Hackney 4m diameter tunnel.

Answered by

Department for Energy and Climate Change