Staple Bend Tunnel - Credit: Wikimedia Commons
Staple Bend Tunnel - Credit: Wikimedia Commons
The Staple Bend Tunnel, about 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 in length, was the first railway tunnel constructed in the United States. It is rock-bored and stone-lined. Read more on Wikipedia
Source: en.wikipedia.org