 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 . 
