Public Domain; Published before 1923
BH Photo #500680
THE PHOTO IS IN THE PHOENIX ALBUM OF DESIGNS OF 1885 WHICH CAN BE FOUND AT THE ABOVE ADDRESS, THUS DATING IT AS 1885 OR EARILIR.
Photo plate description does not mention a date.
Great find! Spectacular bridge! I suspect that is a builder’s photo. Do you know the source? It may have a date.