While the South Pennsylvania Railroad never came to fruition and is known in history as "Vanderbilt's Folly", the Quemahoning Tunnel has the distinction of being the only tunnel of the nine tunnels constructed on the South Pennsylvania alignment that was actually used by railroads, as it was used by the Pittsburgh, Westmoreland and Somerset Railroad from 1909 to 1916.
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The railroad’s sole tunnel was the Quemahoning Tunnel, also known as the Lumber Railroad Tunnel, which had originally been built for the South Pennsylvania Railroad but had not been previously used.