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Boring Machines) named Evelyn and

Cleopatra.

Working at depths typically ranging

from 20 to 60 metres underground en-

gineers have had to negotiate the chal-

lenges of tunneling beneath the Thames

and working around London’s existing

labyrinth of tunnels, sewers and

citadels.

David Luetchford, National Grid’s

Head of Cable Tunnels said:

“This is a really exciting landmark

and takes us one step closer to the

completion of the project.

“It’s amazing to think that

over the last four years our tunne-

ling teams have been digging around

the clock, with many Londoners un-

aware of what’s been happening be-

neath their feet.”

Since tunnelling began engineers have

excavated enough material to fill the

Emirates stadium. This has been put to

good use with much of the London Clay

excavated being used to remediate for-

mer National Grid gasworks across the

capital, so the land can be freed up for

redevelopment opportunities.

Installation of the high voltage elec-

tricity cables which will transport energy

supplies across London is already well

underway and the first section due to go

live this year.

The tunnels will plug London into new sources of

energy which will help ensure future demand can be

met. Currently accounting for 20 per cent of the country’s

energy use, demand in the capital is growing at a rate

of around 5 per cent a year.

Mr Luetchford said:

“This project will create a new energy

superhighway deep beneath the capital which

will help ensure Londoners continue to have the

energy they need at their fingertips.

“When we switch on London Power Tunnels

it will play a vital role in maintaining the capital’s

status as a leading global city – it’s very exciting

to be a part of that story.”

The project is due to be complete and fully opera-

tional in 2018.

[cw]

Contractors World UK & Ireland Vol 6 No 1

18

Contractors World UK & Ireland