 On October 1, 2010, MTA awarded a $ 431 million contract to joint venture SSK Constructors for the mining of the tunnels connecting the 72nd Street station to the existing Lexington Avenue – 63rd Street station, and for the excavation and heavy civil structures of the 72nd Street station. A subsequent contract was awarded to Skanska Traylor Joint Venture for excavation of the cavern at the 86th Street station on August 4, 2011. In January 2011, MTA awarded Judlau Contracting a 40-month, $ 176.4 million contract to rebuild and enlarge the Lexington Avenue – 63rd Street station.
