It was the first major railroad tunnel in the South and is 1,447 feet[1]/0.274 miles; 441 meters in length.
It was renovated in 1998-2000 and is now open to the public as a privately owned historic site.
[2] Two historic events occurred here during the American Civil War; first the Great Locomotive Chase and second a battle between Union and Confederate forces during the Atlanta Campaign.
Andrews and company made it north of this location before they ran out of water and steam to run the locomotive, where they abandoned the train.
Union forces were generally invading and securing the rail lines as they progressed towards Atlanta.