Firstly, great respect to these websites.
http://www.oldminer.co.uk/Carr%20Vale/Carr_Vale_and_Area.htmhttp://www.forgottenrelics.co.uk/tunnels/bolsover.htmlI've lived in Bolsover all my life, and have known about the viaduct in Carr Vale,
but never actually gave it much thought till now.
So with the info in the websites mentioned previously, "I've", managed to pinpoint the viaduct's location.
(It's probably well documented and on the net, I just wanted to see it on a picture.)
The entrance to the tunnel, which I have actually visited and seen as a kid, apparently it's buried now.
Had a play with an overlay of images and came up with these.
Left circle, viaduct. Right circle, tunnel entrance.