In the Response to Comments chapter of the Final Supplemental Environmental Impact Statement (Final SEIS) approved 6/12/14, Empire State Development (ESD), the state agency overseeing/shepherding Atlantic Yards, dodged the question.
The DSEIS [Draft SEIS] does not provide a projected date for the development of certain platform and foundation construction, including the building of the platform needed for vertical development over the Vanderbilt Yard. (James)The ESD response:
Figures 3A-2 through 3A-4 and Tables 3A-2 through 3A-4 of the DSEIS show the illustrative construction schedules for each of the Phase II project construction elements, including platform construction activities over the Vanderbilt Yard, for the three illustrative construction phasing plans under the Extended Build-Out Scenario. Construction may proceed more rapidly or in a different order depending on market conditions and other factors.In other words, there's no timetable.