Stone arch bridge (Uhlerstown Hill Rd.) N. of Erwinna, Tinicum Township, Bucks County, PA. PA32 (River Rd.) N. 1.7 miles from jct with Headquarters Rd. on the E. side of Erwinna, W. (turns N.) on Uhlerstown Hill Rd. 0.3 miles to the bridge on the W. side of the road. (6-24-06, N40 31.55 W75 04.41) Photos by Jack Schmidt.