The station's upper and lower levels are about and deep respectively, making the station among the system's deepest. This depth is because it has to go under the IRT Lexington Avenue Line and other existing infrastructure, in addition to the IND tunnels having to go under the East River a short distance to the east. At the original (1989) mezzanine at Lexington Avenue, there are a total of eight escalators, four staircases and two elevators from the fare mezzanine to platform level. There is an in-building entrance with two escalators and a staircase, and another, stand-alone entrance with a staircase, from the street to the Lexington Avenue fare mezzanine. Two additional staircases between the platform levels are at the eastern end of platforms, past the elevator. A third staircase between the platform levels has been constructed.