<Tr> <Td_colspan="2"> bigbayboom.com </Td> </Tr> <P> Big Bay Boom is an annual Independence Day fireworks display in San Diego, California . The event has been put on since 2001 . It is claimed to be one of the largest annual fireworks displays in the United States . It is "one of the most logistically complex displays in the world;" from 2010 through 2012 it spanned 14 miles and five locations . The primary sponsor is the Port of San Diego . Since 2014 the fireworks are presented by Pyro Spectacular by Souza, which acquired former presenter San Diego Fireworks . Half a million people congregate on the shores of San Diego Bay to watch the show . </P> <P> For many years there has been a fireworks display over San Diego Bay from the city of Coronado, California . Sandy Purdon, a marina owner and former president of the Port Tenants Association, got the idea to do a similar but bigger fireworks show from the San Diego side of the Bay . He recruited financial support from other bayside business owners and brought the Port of San Diego on board with financial and in - kind support . The first display in 2001 involved fireworks from two barges in San Diego Bay . The event grew to involve three barges in 2004 and four barges in 2005 . In 2010 the Imperial Beach pier was added as a fifth location . However, in 2013 the city of Imperial Beach withdrew from participation, leaving the four Bay locations . </P> <P> The four barges are located in San Diego Bay adjacent to Shelter Island, Harbor Island, North Embarcadero, and South Embarcadero . All four locations shoot off identical, simultaneous pyrotechnics, coordinated with a patriotic sound track played over a local radio station . </P>

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