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Written in corner: 'As a participating member of Bridge Builders, Inc., Dravo joined with several other firms to construct the substructure for the East Bay Crossing of the San Francisco-Oakland Bridge.'
Written on verso: 'This huge branch connection, called a trifurcation, at the Yards Creek Pumped Storage Hydroelectric Project in northern NJ was fabricated by Chicago Bridge & Iron Co. using Lukens Penstock Steel. The all-welded, three-way connection must withstand great pressures as it breaks a single column of water into three branch flows. It's 'C' girders are 3 1/2 inches thick and its shell 2' thick. Lukens 1966 annual report.'