Although Mr. Leon Moisseiff is often credited with the design of the St. John's Bridge, it was actually the work of Dr. DB Steinman. Read below.

http://www.aracnet.com/~histgaz/hgv1n3.htm

"Linking the Past with the Future"

Volume One, Number Three
St. Johns Bridge Opens Today
Portland, Oregon 1931

Dr. Steinman's Gothic Wonder Arches Over Willamette River

June 13 -- Dr. D.B. Steinman, designer of the St. John's Bridge, chose a gothic style of architecture with the determined purpose of making the span his most beautiful work, "The gothic arch was made of stone in the mideval days because steel had not been developed. It is really more appropriate in steel. Until recently the public took it for granted that steel bridges had to be utilitarian and unattractive, but now the interest is turning to the development of forms of beauty in steel."