• Corporate HQ, NY
  • Melville, NY
  • Iselin, NJ
  • Ossining, NY
  • Mount Laurel, NJ

No. 7 Subway Line Extension Design


New York City<br style='line-height:2px'>New York City Transit

HAKS provided project management, civil engineering, architecture and CADD support to the prime design consultant for the extension of the No. 7 subway line on Manhattan’s west side. The No. 7 line was extended 1.5 miles from its original terminus at Times Square to a new terminal station at West 34th Street and Eleventh Avenue. The extension, carried out by New York's Metropolitan Transportation Authority (MTA), was a key part of an initiative to transform the Far West Side of midtown Manhattan into a vibrant, transit-oriented mixed-use district.

The extension of the No. 7 line provides a connection to an expanded Jacob K. Javits Convention Center and the Hudson Yards area. Bounded by West 43rd Street on the north, Hudson River Park on the west, West 28th and West 30th streets on the south, and Seventh and Eighth avenues on the east, Hudson Yards offers the opportunity for public and private development that is equivalent to the creation of a new mid-sized city within Manhattan.

The project included two new subway stations and some 7,000 feet of new subway tunnel built in bedrock using tunnel boring machine and cut-and-cover construction techniques. HAKS' responsibilities included civil engineering design services for the proposed subway line and stations, project management administrative support, and the development of contract drawings via Microstation. As part of a team of over 20 consultants, HAKS was instrumental in the coordination effort and production of engineering contract documents.

HAKS’ involvement in the project extended to structural engineering design services, including the design of a five-story concrete subgrade structure to accommodate NYCT systems facilities. The structure was designed with composite concrete columns. We also provided structural design services for the tunnel shafts and the cut-and-cover station construction.

The extension opened on September 13, 2015.