Folder: S.F. Bridges-Bay-Construction-Steel Working.
On back: "SAN FRANCISCO-OAKLAND BAY BRIDGE; Walter G. Swanson; 500 Sansome St. - GA rfield 1415. File 900.11 B-12/AA. BRIDGE TAKING SHAPE - Columbia Steel Company erects the first span steel on the San Francisco-Oakland Bay Bridge at the east end, between E-23 and E-22, a 290-foot deck truss span. One-third of the span will be completed early this week. 8-17-34".