LR 66 over Pittsburgh & Shawmut RR, Seminole, Pennsylvania. County/parish: Armstrong.
Added to the National Register of Historic Places June 22, 1988. NRIS 88000796.
1 contributing structure.Also known as:
Colwell Cut Viaduct, also known as Hogback Hill Bridge, is a historic concrete arch bridge located at Mahoning Township in Armstrong County, Pennsylvania. It was built in 1922, and is a 220-foot-long (67 m) three-span bridge, with a 128-foot-long (39 m) main span. It crosses the Pittsburg and Shawmut Railroad.
It was listed on the National Register of Historic Places in 1988.
(read more...)National Park Service documentation: https://catalog.archives.gov/id/71992260