New York opens Subway Line 7 extension

14 Sep 2015

USA: New York Metropolitan Transportation Authority inaugurated an extension of the Subway’s 7-Flushing Line on September 13. The 2·4 km extension runs west from 42 Street/Times Square before turning south to reach a new station at 34 St-Hudson Yards.

‘This station is the centrepiece of an ambitious plan to make the far West Side of Manhattan a top-tier destination for residents and visitors alike while meeting the daily needs of millions of subway riders, and one that is poised to meet future needs’, said New York Governor Andrew Cuomo.

MTA says that the new station is the first to comply with ADA requirements for persons with reduced mobility. There are two inclined lifts between the upper and lower mezzanine levels, each with capacity for five wheelchairs or 15 standing passengers. The station also features the longest escalators on the New York Subway.

Climate control of the platform maintains a constant temperature between 22°C and 26°C. The station features 12 emergency intercom points, as well as 24 screens on the lower mezzanine that display advertising and travel information. Eight ‘On-the-Go’ touchscreen travel information kiosks and wi-fi are to be installed ‘in the near future’, and countdown clocks are to accompany the installation of communications-based train control on the line, due in 2017. The station has a design capacity of 25 000 passengers/h.

The $2·42bn extension was funded by the City of New York, which contributed $2·1bn for the station and $266m for non-Subway infrastructure; $53m came from the MTA.

Construction began in December 2007 and used two Herrenknecht tunnel boring machines to excavate 2·8 km of 6·7 m diameter twin tunnels, marking the first use of double-shielded TBMs in New York.

General contractors taking part in the project included:

  • The S3II Tunnel Constructors joint venture of J F Shea Construction, Skanska Construction and Schiavone Construction;
  • A joint venture of China Construction of America and Halmar International;
  • A joint venture of Skanska Construction and Railworks Transit;
  • Yonkers Contracting Co;
  • A joint venture of Peter Scalamandre & Sons and Oliveira Contracting;
  • John P Picone Construction.

The HLH7 joint venture of Hill International, LiRo Engineers and HDR provided construction management and project control services.

  • A detailed feature on the tunnelling work on the extension appears in the March 2014 issue of Metro Report International, available to subscribers in the digital archive.
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