Quemahoning Tunnel

The Quemahoning Tunnel is a tunnel that was constructed by the New York Central Railroad for use on the stillborn South Pennsylvania Railroad. The tunnel is located in Somerset County, Pennsylvania near the 106.3 milemarker of the Pennsylvania Turnpike.

While the South Pennsylvania Railroad never came to frutrition 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, & Somerset Railroad from 1909-1916.

When the newly-formed Pennsylvania Turnpike Commission purchased the South Pennsylvania Railroad alignment in 1937, the Turnpike considered using the Quemahoning Tunnel, but instead bypassed it. The Laurel Hill Tunnel, which was also constructed by South Penn but used by the Pennsylvania Turnpike until its own bypassing in 1964, is located six miles to the west. The Negro Mountain Tunnel, also bypassed by the Turnpike during the original construction, is located ten miles to the east.