MTA Capital Construction


New York, NY


Rail Transportation: Line Segments & Tunnels, Stations & Terminals, Systems & Control Centers


Design: Civil Engineering, Electrical Engineering, Structural Engineering, Mechanical/HVAC Engineering

Second Avenue Subway Phase II

The opening of the first segment of the Second Avenue Subway on Manhattan’s Upper East Side, marked the culmination of nearly 100 years of planning and development. For the program’s second phase, which will extend service  from 96th Street to 125th Street and Park Avenue, STV, in joint venture with WSP/Parsons Brinckerhoff is providing planning, architectural, civil, structural, mechanical, plumbing and fire protection, traction power and communications systems design, as well as systems integration services. 

As overseen by the Metropolitan Transportation Authority’s Capital Construction Company, Phase 2 will extend the existing tunnel approximately 1.6 miles, and will consist of three new stations at 106th Street, 116th Street and 125th Street. The subway station at 125th Street will serve as the line’s terminus including crew facilities for New York City Transit employees. This station will also connect to the Lexington Avenue subway line and provide easy access to Metro-North Railroad. The program also includes the design of subway tunnels, traction power systems, and other ancillary facilities to support the new line. 

The joint venture’s extended preliminary design addressed a number of important goals, including significant reduction of open-cut construction along 125th Street, early resolution of critical utility relocations and reduction of construction risks.