Not only is Helmut Jahn the architect behind a new tower planned for 1000 S. Michigan Avenue in the South Loop, but this new building is expected to stand at a whopping 86 stories — a height that would make this one of the tallest buildings in Chicago. Of course, the news comes literally just hours after a 76-story tower proposal designed by architect Rafael Viñoly made its public debut. According to drawings uncovered by the development watchers at Skyscraper Page, the tower would stand at a height of 1030', which would make it the fifth tallest tower in Chicago, or sixth if the 93-story Wanda Vista is completed before it. The tower would stand two hundred feet over the 76-story Viñoly-designed tower for 113 E. Roosevelt Road. The project would consist of 506 residential units, 598 parking spaces and retail offerings.