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HS2 in Hillingdon

HS2 in Hillingdon
Proposed Colne Valley Viaduct crossing Harefield lake

Find out what HS2 means for Hillingdon

In Hillingdon, the HS2 route will surface from the new Northolt Tunnel (that connects Old Oak Common to West Ruislip), at the West Ruislip Portal, which sits alongside the existing Chiltern railway line.

The route will then cross over a new bridge close to the existing Chiltern Line railway bridge, and towards the Colne Valley Viaduct.

Two tunnelling machines will be launched from the West Ruislip Portal and will travel five miles east underground to create the western section of the Northolt Tunnel.

Current engagement activities

We recently delivered engagement activities in Hillingdon about tunnelling in the area, including the tunnel locations, how tunnels will be dug and how we will manage the impacts of tunnelling.  We held two online events with a presentation and question and answer session and a programme of virtual one to ones.

View or download the presentation slides for these webinars.

We will publish a set of Frequently Asked Questions about tunnelling on these pages shortly.

HS2 Works in your area

Our In your area map brings all our of work notifications together on one page, making it easier for you to navigate and ensure you are kept up-to-date on the work we are doing in your area.

Search our in your area map to find information about all current works in the Colne Valley Viaduct area.

Search our in your area map to find information about all current works in the Harvil Road & Copthall area.

Search our in your area map to find information about all current works in the Breakspear Road area.

Search our in your area map to find information about all current works in the West Ruislip area.

What we're delivering in Hillingdon

Colne Valley Western Slopes

The HS2 construction site will be transformed into one of the largest areas of new chalk grassland in the Chilterns.

Works affecting public rights of way and local roads

Find out how our works may temporarily or permanently affect footpaths and Public Rights of Way in Hillingdon.

Tunnel boring machine (TBM) power supply route

A high capacity 33 kilovolt (kV) 20 mega volt amp (MVA) cable power supply is needed at West Ruislip for the tunnel boring machines.

Utility works in the Hillingdon area

Find information about the programme of utility works that we are carrying out in the Hillingdon area.

Harvil Road Injunction

The court injunction is necessary to help us keep the public and our staff safe at our work sites.

Copthall tunnel & sustainable placement areas

The design for the Copthall Tunnel and the Northern Sustainable Placement Area (NSPA) has been developed.

Information about Ground Settlement for properties close to HS2 tunnels or excavation works

Find out more about Ground Settlement
  • Construction

    HS2 has appointed joint venture Skanska, Costain and STRABAG (SCS Railways) to deliver civil engineering works across a 26.4km section of the Phase One route, which will run through Hillingdon.

  • Supply Chain

    More than 10 businesses in Hillingdon are working on HS2 already. Almost two-thirds of these businesses are SMEs.

  • Community Fund

    In and around Hillingdon, three CEF projects worth almost £358,000 have already been awarded.

Three month construction look ahead

September 2021

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