The Staple Bend Tunnel, about 4 miles (6.4 km) east of Johnstown, Pennsylvania, in a town called Mineral Point, was constructed between 1831 and 1834 for the Allegheny Portage Railroad. Construction began on April 12, 1831. This tunnel, at 901 feet (275 m) in length, was the first railway tunnel constructed in the United States. It is rock bored and stone lined.
Finished in June 1833, the Staple Bend tunnel was advertised as the first railroad tunnel in the United States. It was the third tunnel of any kind built in the US, the first tunnels were for other canals in Pennsylvania.(Wikipedia)