The system of temporary bracing provides support for the perimeter foundation walls. Concrete had been in place for almost four weeks at the time this photo was taken; waterproofing of the exterior face of the wall and backfilling may be underway or completed. The bracing also provides support to the timber towers below the derricks. The steel columns will extend from the new first basement level upward. Visible at right center of the photograph is a concrete pier that will support a steel column.