Iron bridge (McKeesport Duquesne, 2,252', 1937) across Monongahela River in Duquesne, Allegheny County, PA. PA837 (Duquesne Av.) S. (curves W.) 1.0 miles from jct with Grant Av. in Duquesne, S. & the bridge. (JS, 7-30-06, N40 21.49 W79 50.65) Photo by Jack Schmidt.