Due to some major work being done on the Wrigley Building, there will be a full street closure schedules to accommodate a helicopter lift of materials at 400 N. Michigan. Michigan Avenue will be completely closed off from Wacker Drive to Illinois Street. In addition to no traffic, there will also be no pedestrian access permitted at this time. The closure will begin at 9am on Saturday, October 20 and will remain closed for two hours, reopening at 11am.