Bridge in Portage Township
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Bridge in Portage Township is a historic stone arch bridge located at Portage Township in Cambria County, Pennsylvania, United States. It was built by the Allegheny Portage Railroad in 1832, and is an
Western side
Arch bridge
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An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of this bridge and its loads partially as horizontal thrust restrained by th
Bridge in Portage Township
…Bridge in Portage Township is a historic stone arch bridge located at Portage Township in Cambria County, Pennsylvania, United States. It was built by the Allegheny Portage Railroad in 1832, and is an 18-foot-long…
A double-arch stone bridge in Nagasaki, Japan
The Roman Alcántara Bridge, Spain (built 103-106 AD)
The Anji Bridge, 6–7th century AD
Segovia Aqueduct (c. 100 AD)