 The original building was a three-story structure with two towers and of floor space.The $3 million postal annex opened in May 1940 with 1,632 postal clerks, carriers and laborers responsible for the processing of 2 million pieces of mail per day.The facility, which was kept open 24 hours a day, was equipped with the latest facilities for rapid handling of mail, including conveyors, chutes, weighing machines, cancelling machines, and sorting and facing tables.