Golden Gate Bridge seismic retrofits don't change classic look

For the past decade, engineers have retrofitted and reinforced San Francisco's Golden Gate Bridge with the goal of creating a bridge that can withstand a magnitude 8.3 earthquake. They have replaced entire towers, covered support pylons with steel and replaced road sections bit by bit -- all without closing the bridge or changing its appearance. The third phase of the $660 million retrofit is under way and includes anchorage housing and pylon reinforcement. The final phase of construction, slated to go out to bid next year, includes reinforcement of the main towers, south pier and fender.

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