By mid-December 2003, the roof decking for the southwest quadrant of the site was in place. Concrete was poured on the roof deck, which soon became home to hundreds of tons of materials being used to form the lower and upper level floor slabs. Steel framework continued to be erected on the north side of the site, which is punctuated with a tower crane that is being used to deliver materials throughout the northern half of the site. Work continued on the slab on grade and for the lower level floor slab. Crews also continued placement of conduit and utilities in all areas of the site. Demolition work continued in the East Front to clear the way for the transition zone between the CVC and the Capitol, including new mechanical systems, stairs, elevators and escalators. Excavation, formwork and concrete placements continued along the length of the new truck tunnel (center right of photo).