This is a long one. It’s 4,688′ or so and centered at 37.152524, -81.693367, near Bandy VA. Interesting design on this portal. Since I’d just made a production of sliding on my belly down the 30′ or so embankment coming up here, I wasn’t in the mood to trudge over to the other portal to check it. You can, if you want to.
Blogging the Railroad Tunnels 
This is right below my family’s homestead on Tunnel Hill. We used to walk the tunnel when we were kids.
The tapered entrance section on Dry Fork 3 was provided so that ventilation by fans could be added if needed.
Thank you!