DART Underground Project

Project Details

Client Arup/Halcrow JV
Date 2008-201
Skills Construction Planning, Risk Management
Value Est. € 2.55b

Project Description

Iarnród Éireann is advancing work on a new underground second DART (Dublin Area Rapid Transit) Underground scheme (also known as ‘Dublin’s Interconnector’) line through the heart of Dublin city centre which is proposed to run from Docklands to Inchicore and will complete the trebling of the Greater Dublin area’s rail service capacity from 33 million passenger journeys annually now to 100 million passenger journeys upon completion.

The DART Underground route is approximately 9.2km in length and comprises a total of approximately 7.2km of bored tunnel (7.6 km including cut and cover), a station at Inchicore and five underground stations within the City Centre at Docklands (interchange with Luas Red Line and serves the financial centre), Pearse (interchange with DART services from Maynooth / Dunboyne (M3) to Bray / Greystones and existing mainline Intercity and Commuter services), St Stephen’s Green (interchange with Dublin Metro North and Luas Green Line), Christchurch (potential future interchange with Luas Line F) and Heuston (interchange with mainline Intercity and Commuter services).

The proposed scheme includes 4No 174m long underground stations: at Pearse, St Stephen’s Green, Christchurch and Heuston, 1No cut and cover station at Docklands and 01 below grade station at Inchicore;

LBA Role:

LBA were commissioned by Halcrow to develop a construction plan and programme for both the tunnels and stations with particular reference to the civil engineering aspects as part of their contract with Iarnród Éireann (Irish Rail) to develop a Reference Design and EIS in support of the process of obtaining a Railway Order for the Project and appointing a PPP Contractor.

Project Highlights

The DART Underground will complete the transformation of the Greater Dublin Area’s rail service which will provide:

  • Dramatically increased frequency and capacity for services on the Northern, Maynooth and Kildare lines – the three fastest growing population corridors in the country – and relieving the current congestion at Connolly Station
  • A fully integrated rail network for the Greater Dublin area, linking all modes – DART, Commuter, Intercity, LUAS and Metro – and ensuring that suburb to suburb as well as suburb to city centre journeys can be made by a frequent, high capacity public transport network
  • Two high capacity DART lines proposed as Balbriggan/Howth to Hazelhatch; and Maynooth/Dunboyne(M3) to Bray/Greystones, with DART extensions to some routes likely to be delivered in advance of the DART Underground
  • A trebling of the number of passenger journeys by DART and Commuter rail annually – up from 33 million today to 100 million
  • A critical piece of urban, regional and national infrastructure
  • Between 6,000 and 7,000 jobs directly in each year of the construction phase, with many thousands more jobs indirectly.