The stainless steel and aluminum exterior facade will be accented by light green, lightly-tinted low e coated double glazing. Six distinct groups of floors will be visible. The lower two groupings will be separated by standard setbacks, while the upper four groupings will be divided by distinctive notches that underscore the building's role as a transmission tower and reveal the cantilevered character of its construction.

7 South Dearborn............Chicago, Illinois