Today marks the 75th anniversary of the opening of the Golden Gate Bridge. The San Francisco Bay Area is considered a hotbed of technological innovation and development. Its origin, in this regard, is usually traced to a profusion of post-WWII achievements led by companies such as Hewlett-Packard and Fairchild Semiconductor. However, a strong case can be made that the conception and creation of the Golden Gate Bridge is the true genesis of Bay Area hegemony, for the following five reasons:
It Solved a Real Problem – Before the bridge, ferries transported automobiles between San Francisco and what is now Marin County. A one-way trip took 20 to 30 minutes (depending on departure location), cost $1.00 (twice the initial 50¢ toll for the bridge), and at peak times the wait for a ferry could be several hours.
It is an Early Example of Crowd Sourcing – James Wilkins, a former engineering student, made the bridge proposal that took hold in a 1916 article in the San Francisco Bulletin. San Francisco’s City Engineer estimated the cost at $100 million, and posed an open question to bridge engineers of whether it could be built for less. Joseph Strauss, who had designed several hundred inland drawbridges, responded with initial drawings for two massive cantilevers, one on each side of the strait, connected by a central suspension segment, which he said could be built for $17 million.
It is Innovative Engineering – Joseph Strauss became chief engineer of overall design and construction, but his initial proposal was replaced by a more graceful suspension design from New York’s Manhattan Bridge designer Leon Moisseiff. The basic structural design introduced his “deflection theory,” by which a thin, flexible roadway would flex in the wind, greatly reducing stress by transmitting forces via suspension cables to the bridge towers. When completed, the suspension bridge had the longest main span in the world, at 4,200 feet, and the tallest suspension towers, at 692 feet (above water).
It is Insanely Great Aesthetic Design – Irving Morrow designed the overall shape of the bridge towers, the lighting scheme, and elements such as the streetlights, railing, and walkways. He also decided to keep the vibrant International Orange color, originally used as a sealant for the bridge, instead of the standard silver or gray used on most bridges, because, in addition to its durability, it complements the natural surroundings and enhances the bridge's visibility in fog. In 2007, the Golden Gate Bridge was ranked number five on the American Institute of Architects (AIA) sponsored list of America’s Favorite Architecture.
It is a Symbol of American Persistence – Although the project design, construction, and financing was authorized in 1928, the 1929 crash made it impossible to raise the construction funds as planned. Instead, a $30 million bond measure was passed in 1930. However, there was no buyer for the bonds until Amadeo Giannini, the founder of San Francisco–based Bank of America, agreed on behalf of his bank to buy the entire issue in 1932. Construction began in January 1933 and was completed in April 1937, at a total cost $1.3 million under budget.