|July 2014 (37.77694 Bridges, -122.39000 Bridges) Third Street Bridge|
The Third Street (Lefty O'Dowd) Bridge (34C0025) is next to the AT&T Baseball Park in China Basin. It's a Strauss Heel Trunion Single Leaf Bascule Bridge that was built in 1932. These bridges are interesting to watch open and close. In order for the leaf span to be lifted high in the air, the arms that hold the counterweight fold up and rotate the weight out of the way of the approaching roadway. There are several nice videos on Youtube showing the bridge opening and closing. The bridge also has an unusual split counterweight.
San Francisco County, California Bridges: Third Street Bridge across China Basin by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.