| Colwell Cut Viaduct | |
| U.S. National Register of Historic Places | |
 Colwell Cut Viaduct, 1982 | |
  Show map of Pennsylvania Show map of the United States | |
| 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 / 40.93694°N 79.36306°W / 40.93694; -79.36306 |
| 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 |
| 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.
References
- ^ "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
- "National Historic Landmarks & National Register of Historic Places in Pennsylvania". CRGIS: Cultural Resources Geographic Information System. Archived from the original (Searchable database) on 2007-07-21. Retrieved 2012-08-24. Note: This includes T.R. Sitler (July 1982). "National Register of Historic Places Inventory Nomination Form: Colwell Cut Viaduct" (PDF). Retrieved 2012-08-24.
