 The three giant buildings that tower six floors above the river each contain over one half million square feet of floor space and house a major part of NSA tenants.The of land and three buildings have a history that began in June 1919, when the buildings were constructed for the U.S. Army Quartermaster Corps for use as a general logistical depot during World War I.These buildings were partially used by the U.S. Army Quartermaster Corps after completion until February 1931, when Buildings 601 and 602 were leased to the Board of Commissioners, Port of New Orleans.