 The project included restoration of the main lobby to emphasize the design features of the art deco era, elevator modernization, façade renovation and cleaning, and the continued renovation of upper floor corridors and hallways.Though impractically small for modern use, mailboxes in the lobby were restored to their original condition to follow the theme of vertical lines found throughout the complex.An improved electrical infrastructure, with ten main feeds from seven different Commonwealth Edison electrical substations, was added in addition to redundant cooling systems and upgraded telecommunications capabilities.