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MTA Board Approves $2 Billion Tunnel-Boring Contract to Extend Second Avenue Subway to 125th Street

Funded partly by congestion-pricing revenue with federal support tied to matching funds, the contract launches early utility relocations before tunneling begins in 2027.

It's full speed ahead for the new Second Avenue subway in East Harlem.
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A section of Phase Two of the Second Ave. Subway near E112th St. is pictured Tuesday, Nov. 23, 2021 in Manhattan, New York. (Barry Williams)

Overview

  • Connect Plus Partners won the roughly $1.97 billion contract to bore twin tunnels from 96th to 125th Street and excavate space for the future 125th Street station
  • Phase 2 will add three ADA-accessible stops at 106th, 116th and 125th streets with a direct transfer to the Lexington Avenue lines at 125th
  • Reusing a 1970s-built tunnel segment for the 116th Street station and other cost-containment measures are expected to save about $1.8 billion overall, including $500 million on tunnel routing
  • Early utility and street work begins later this year, heavy construction starts in early 2026, and 750-ton tunnel-boring machines are slated to start digging in 2027 toward a 2032 opening
  • The expansion depends on congestion-pricing funds and conditional federal grants, aims to create about 70,000 jobs with a 20% local-hire goal in East Harlem, and is proceeding even as some residents receive eminent-domain notices