The giant tunnel boring machine (credit National Grid)

Massive machine moves under London

Engineers from National Grid’s London Power Tunnels project have reached a major landmark in their tunnelling operations.

Since it began its journey from Willesden Substation earlier this year, giant tunnel boring machine (TBM) Evelyn has dug almost 3km of tunnel deep below London and has now reached the pre-prepared tunnel shaft at National Grid’s site in Kensal Green.

Evelyn is digging 19km of the 32km London Power Tunnels project, which is intended to provide an easy to maintain underground electricity superhighway for the capital when it is complete in 2018.

A second TBM, Cleopatra, is digging the other 13km of the route.

National Grid’s Head of Cable Tunnels David Luetchford said: “The breakthrough at Kensal Green takes us one step closer to completing this essential project, as just one part of a much bigger story.”

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