This is an old tunnel (36.715900 N , 83.671831 W) on an unused line between Pineville and Middlesboro KY. This is the unfaced south portal. The tunnel is a little over 600′ in length. The north portal was faced up in 1944, but this shows how the road gang blew through the stone. I think this tunnel was opened in the early 1900s by the L&N.
Blogging the Railroad Tunnels 
I enjoy your photos. Keep up the good work.
Many thanks!
Bob, I have photos of a tunnel I explored on the Bluestone Branch. I wish there was a way I could share it with you.
Buddy
Thank you for the good thought!