Frank (Franz) L. Stahl

From the obituary in the ENR {Engineering News-Record) from 5/4/2011:

Frank L. Stahl, 91, a Holocaust survivor who became a noted bridge designer and the chief engineer at Ammann & Whitney Consulting Engineers PC, at which he built and rehabbed many landmark U.S. spans and highways, died on April 17 in Sandy Springs, Ga. . . .Stahl joined A&W in 1946, working directly for its legendary founder, O.H. Ammann. Stahl held key roles in designing Philadelphia's Walt Whitman Bridge and New York's Verrazano-Narrows and Throgs Neck bridges in . . .