In the 1970s , the bridge was a filming location of the TV series '' Emergency ! '' fifth season ( episode 14 ) where a boy was shown trapped ( the bridge was given the fictitious name Johnson Canyon Bridge in the episode ) . In 1989 , after the Loma Prieta earthquake in Northern California , the bridge was declared a seismic hazard and closed to traffic . It was reopened in 1993 after a substantial retrofit . The bridge is closed each summer for a festival , " A Celebration on the Colorado Street Bridge " , hosted by historic preservation group Pasadena Heritage
Loma Prieta earthquake
1989 Loma Prieta earthquake
Colorado Street Bridge (Pasadena, California)