Colwell Cut Viaduct

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.[2]

Colwell Cut Viaduct
U.S. National Register of Historic Places
Colwell Cut Viaduct, 1982
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Location	Legislative Route 66 over the Pittsburg and Shawmut Railroad southwest of Seminole, Mahoning Township, Pennsylvania
Coordinates	40°56′13″N 79°21′47″W
Area	less than one acre
Built	1922
Built by	Concrete Steel Bridge Co.
Architectural style	Open-spandrel arch
MPS	Highway Bridges Owned by the Commonwealth of Pennsylvania, Department of Transportation TR
NRHP reference No.	88000796[1]
Added to NRHP	June 22, 1988

It was listed on the National Register of Historic Places in 1988.[1]

References

1. "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
2. "National Historic Landmarks & National Register of Historic Places in Pennsylvania" (Searchable database). CRGIS: Cultural Resources Geographic Information System. Note: This includes T.R. Sitler (July 1982). "National Register of Historic Places Inventory Nomination Form: Colwell Cut Viaduct" (PDF). Retrieved 2012-08-24.