Well, when they finished pouring the Vesey portion of the eastern plaza, it was pretty much shaped like this one. The holes are just for trees, they put steel girders over the tree wells to make a flat surface, and then the crane comes in. With rebar, concrete is pretty much unbreakable. They also stopped working for the holiday weekend, and have to dig into West Street to place the plaza, stairs, etc.
@Wheelingman04: The floor-a week schedule, seeing how fast they put up the steel cage around the north crane, should commence by either December or early next year. This is going to make some sick aerial photos.