Colwell Cut Viaduct
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Colwell Cut Viaduct
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Colwell Cut Viaduct, 1982
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| Location | Legislative Route 66 over the Pittsburg and Shawmut Railroad southwest of Seminole, Mahoning Township, Pennsylvania |
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| Coordinates | 40°56′13″N 79°21′47″W / 40.93694°N 79.36306°WCoordinates: 40°56′13″N 79°21′47″W / 40.93694°N 79.36306°W |
| Area | less than one acre |
| Built | 1922 |
| Built by | Concrete Steel Bridge Co. |
| Architectural style | Other, Open-spandrel arch |
| MPS | Highway Bridges Owned by the Commonwealth of Pennsylvania, Department of Transportation TR |
| NRHP Reference # | 88000796 |
| Added to NRHP | June 22, 1988 |
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.
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