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== Seismic Retrofit ==

== Seismic Retrofit ==

In October of 1989 when a 7.1 richter earthquake hit the Bay Area, the nearby [[Oakland-San Francisco Bay Bridge]], (built from 1933 - 1936), was unable to withstand the tremors, causing the upper deck of the bridge to fall unto the lower level. <ref>  

In October of 1989 when the [[Loma Prieta Earthquake]], a 7.1 richter earthquake hit the Bay Area, the nearby [[Oakland-San Francisco Bay Bridge]], (built from 1933 - 1936), was unable to withstand the tremors, causing the upper deck of the bridge to fall unto the lower level. <ref>  

http://www.answers.com/topic/san-francisco-oakland-bay-bridge  

http://www.answers.com/topic/san-francisco-oakland-bay-bridge  

</ref>

</ref>