All forms and pillars for floor 10 completed, Pillers and forms for floor 11 started, Only top of Willis Tower visable -- March 17, 2019
All forms for floor 11 completed -- March 21, 2019
All forms for floor 11 completed, concrete for south end of 11 poured, starting forms for south end of floor 12, showing high crane with a load and Willis Tower no longer visable -- March 22, 2019
More forms on floor 12 completed -- March 25, 2019
Pouring concrete in column to 12th floor -- March 27, 2019
13 floors erected -- April 6. 2019
Windows began on 4th floor -- April 6, 2019
Pouring concrete on 13th flooor and windows on 4th and 5th floors -- April 16, 2019
Up to 14th floor, windows with whith walls on 5th floor -- April 20, 2019
More windows with white walls -- April 20, 2019
