Lefty O'Doul Bridge

The Lefty O'Doul Bridge carries the history of local engineering directly into the present. It was designed by Joseph Strauss, the same chief engineer responsible for the Golden Gate Bridge. When it opened in nineteen thirty-three, the structure was a vital link for streetcars, trains, and automobiles navigating the waterfront. The bridge utilizes a specialized heel trunnion design, which was a cost-effective alternative to more complex drawbridges of its era. This mechanical system allows the massive steel leaves to lift using concrete counterweights rather than requiring a deep pit beneath the water. It remains the only remaining bridge of this specific patented design in the San Francisco area.