NEW : Bridge ` ` is safer than when we closed it on daily , '' official says . San Francisco-Oakland bridge closed last week for scheduled retrofitting . Workers discovered `` significant crack '' on the east span of bridge . The Bay Bridge was closed last week as part of a seismic retrofitting project that required cutting out and replacing a double-deck portion of the east span . About 280,000 vehicles travel California Bay Bridge daily .
NEW : Bridge `` is safer than when we closed it on daily , '' official says . San Francisco-Oakland bridge closed last week for scheduled retrofitting . Workers discovered `` significant crack '' on the east span of bridge . About 280,000 vehicles travel California Bay Bridge daily .