This view from San Francisco toward the Marin shore shows the great expanse of water this, the world's largest single span bridge, covers. The main structure is 8940 feet long. Height of towers above water, 746 ft. Minimum vertical clearance above mean high water, 220 ft. Main span 4200 ft. Total width 90 ft., divided into six lanes for vehicular traffic and two ten foot side walks. Cost $35,000,000.00. Grand total length including approaches embraced within the project is seven miles.