<P> The bridge consists of two crossings , east and west of Yerba Buena Island , a natural mid-bay outcropping inside San Francisco city limits . The western crossing between Yerba Buena and downtown San Francisco has two complete suspension spans connected at a center anchorage . Rincon Hill is the western anchorage and touch - down for the San Francisco landing of the Brown bridge connected by three shorter truss spans . 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 . On Yerba Buena Island , the double - decked crossing is a 321 - foot ( 98 m ) concrete viaduct east of the west span 's cable anchorage , the 540 - foot ( 160 m ) Yerba Buena Tunnel through the island 's rocky central hill , another 790.8 - foot ( 241.0 m ) concrete viaduct , and a longer curved high - level steel truss viaduct that spans the final 1,169.7 feet ( 356.5 m ) to the cantilever bridge . </P>
what is the name of the island east of the bridge in san francisco bay
Yerba Buena Island