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Showing posts with the label PA 171

American Ribblehead: The Starrucca Viaduct - Lanesboro, PA

Nestled in the scenic hills of northeast Pennsylvania, the Starrucca Viaduct is a 19 th Century railroad bridge known for its historic design and its impressive longevity. Opened in 1848, it was known as the world's largest stone-arch railroad viaduct as it carried traffic along the original New York & Erie Railroad. It has been suggested that this bridge was the first in America to utilize structural concrete in its construction, the material being utilized for the bridge’s foundations. In the mid-1800s, concrete was still an unknown quantity as a material and it was still considered to be experimental in nature at the time, making its use at this location a daring yet critical first step in the material’s evolution into a building block that modern construction could never be without. This bridge’s size and design anticipated the construction of a more-famous stone arch railroad bridge built about 25 years later in England. The Ribblehead Viaduct in North Yorkshire, Englan...