The old (non-earthquake safe) metal bridge had finally been fully removed, leaving behind the new concrete and steel bridge.

For various reasons, the eastern section would have been too expensive to retrofit compared to replacing it, so the decision was made to replace it. The replacement section underwent a series of design changes, both progressive and regressive, with increasing cost estimates and contractor bids. The final plan included a single-towered self-anchored suspension span starting at Yerba Buena island, leading to a long viaduct to the Oakland touchdown.[from wikipedia]

The bridge consists of two crossings, east and west of Yerba Buena Island, a natural mid-bay outcropping inside San Francisco city limits. The eastern crossing, between Yerba Buena Island and Oakland, was a cantilever bridge with a double-tower span, five medium truss spans, and a 14-section truss causeway. Due to earthquake concerns, the eastern crossing was replaced by a new crossing that opened on Labor Day 2013.[from wikipedia]

The bridge has two sections of roughly equal length; the newer unnamed eastern section connects Yerba Buena Island to Oakland.[from wikipedia]

Unlike the western section and the original eastern section of the bridge, the new eastern section is a single deck with the eastbound and westbound lanes on each side making it the world's widest bridge, according to Guinness World Records.[from wikipedia]