Chetoogeta Mountain Tunnel was created in 1850.
Allegheny Mountain Tunnel was created in 1939.
East River Mountain Tunnel was created in 1974.
Big Walker Mountain Tunnel was created in 1972.
Milford Tunnel was created in 1839.
Am Tunnel was created in 1993.
Mount Victoria Tunnel was created in 1931.
Sideling Hill Tunnel was created in 1940.
Cascade Tunnel was created in 1900.
Liberty Tunnel was created in 1924.
Northbrae Tunnel was created in 1912.
Townline Tunnel was created in 1972.
Tar Tunnel was created in 1787.