Skanska is to build the 33km long high-voltage electricity cable tunnels between Hackney and Willesden and between Kensal Green and Wimbledon in southwest London on behalf of main contractor Costain.
Costain was awarded the £200M main contract from National Grid in October last year. It said was “delighted” to be working with Skanska on the job.
The cable tunnels, which will be three and four metres in diameter, will help provide continued safe and secure electricity supplies for central London.
Skanska’s assignment also includes the construction of access shafts and head houses for electrical equipment.
Works will start this year, with the tunnelling being completed by end of 2014 and with all associated works completed in November 2018.