If you're visiting the Allegheny Portage Railroad National Historic Site and plan on doing a little walking down the 6 To 10 Trail, the Skew Arch Bridge is one of the first sites you'll see after leaving the Lemon House. The entire Allegheny Portage Railroad was built as part of the Pennsylvania Mainline Canal System, which consisted of 10 inclined planes transporting canal boats and railroad cars over the Allegheny Mountains. The APRR was 36 miles long, operating between Hollidaysburg and Johnstown.
In 1832 a bridge was commissioned to allow the passage of the Cambria & Indiana Turnpike Road over the railroad. The design of the bridge was changed in 1833 in order to allow for a bend in the Turnpike, thus the name. Skew Arch Bridge was the only road bridge built along the railroad. In order to save money on materials and transportation costs, much of the bridge was built with broken stone taken from the railroad. As with most of the Allegheny Portage Railroad National Historic Site, no plans or drawings of bridge have ever been found.
Interestingly, a portion of Old U.S. 22 was built on the right of way of the old Portage Railroad and Skew Arch Bridge is located in a median between the east and westbound lanes of the highway. Remarkably, much of the bridge survived intact. In 1979 repair and stabilization work were done on the bridge, allowing it to be enjoyed today. In order to reach the bridge from the trail, walk down the spur or the mowed section of the incline. Or if you're driving, the bridge is located about a mile from the Summit Exit on New US 22. Parking is available at the bridge. To find it on Google Maps, type in "Allegheny Portage National Historic Site." Look just to the east (right) along Old U.S. 22, where the lanes split (at Healy Road). Zoom in and you'll find it easily read more