RR bridge (Pittsburgh & Lake Erie) across Youghoigheny River in McKeesport, Allegheny County, PA. PA148 (5th Av.) W. 0.2 miles from jct with PA148 (Market St.) in McKeesport to the bridge on the N. side of the road. 5th Av. bridge in the background. (7-30-06, N40 21.06 W79 52.22) Photo by Jack Schmidt.