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HOCHTIEF is working in joint venture to deliver Package 2 of the London Power Tunnels Phase 2 (LPT2) project. The works involve building the tunnels and shafts for the second phase of National Grid’s scheme to rewire the capital and replace existing electricity cables that are coming to the end of their life.

Key features:

  • 32.5km of tunnel between 10m to 63m deep over 3 sections:
    • Wimbledon to New Cross (12km tunnel)
    • New Cross to Hurst (18km tunnel)
    • Hurst to Crayford (2.5km tunnel)
  • 7 deep shafts (approximately 30m)
  • 18km EHV cable
  • Substation modification
  • Utilities diversions

We will use tunnel boring machines to dig a 32.5km network of new cable tunnels over three sections between Wimbledon and Crayford in South London. We are also sinking seven new deep shafts at key locations along the route. The shafts will later be covered by headhouses to provide access and ventilation for the tunnels.

LPT2 follows on from National Grid’s original London Power Tunnels project (LPT1), a seven-year £1 billion scheme to build 32km of tunnels and two new substations north of the Thames. Work on LPT2 began in spring 2020 and will take six years to complete. The two London Power Tunnels phases will join at Wimbledon by 2026.