Looks like the real fun is just starting over at the City Centre construction site on the 300 Block of East State Street. With the piles in and foundation slab poured, work is starting to head skyward. The structural steel frame is being assembled, generally from east to west, beam by beam, and bolted into the concrete-encased structural support columns that will transfer the weight of the upper floors into the foundation and bedrock. Some of the exterior foundation walls are still being formed, but where it’s more further along, the steelwork has progressed far enough with its columns and cross beams that corrugated steel decking has been laid. Meanwhile, work continues on forming and pouring the concrete for the stairwell and elevator columns.
The entrance to the underground parking garage is pretty close to where the Green Street construction entrance is. The ground level will have a courtyard driveway accessed from South Aurora Street, but will not have a direct connection to the garage below (the armchair cynic suspects that will mess around with people for years to come).
Purcell Construction has a webcam set up, which shows the construction progress to date. Steel is rising rapidly on the curved northwest corner. It’s pretty fascinating to watch months of construction in 51 seconds.
One week later (2/18):
Ithacating in Cornell Heights 
That video sure was fun. Thanks BC.
It’s amazing how much this has progressed even since you took these photos; there are several stories of steel at the State/Aurora intersection now.