Many thanks to epoxybot for all the detail and especially this: Since the tower’s foundation was mechanically connected to the shoring wall during the tower’s construction and it didn’t show any signs of settlement; SGH seems very optimistic that the shoring wall will indeed settle. From the 13th floor to the 42nd floor, 56% of the building weight was incrementally added to the tower, at approximately 3 million pounds per floor, per week. When the tower was released from the shoring wall, tower settlement accelerated dramatically until the topping off ceremony. There are complications, like the western garage shoring wall being tied in some way to the other shoring walls by the stout diagonal bracing as the garage excavation was being made, and now being stuck in some way to the garage wall because a bond-breaker was never installed, and the fact that the Old Bay Clay would not have been pushed back on to its virgin curve until the Tower got up somewhere approaching its full height, but Hamburger's 2019 assertion that the mat would just push the shoring wall down when they came in contact was very cavalier, and the fact that the ERDT signed off on this suggests that they were asleep at the wheel. Oh, wait a moment, they did recommend in their letter signing of on the Perimeter Pile Upgrade that they be retained for 10 years to monitor it. Maybe they were wide awake?