Having real problems with these. See below.
T15 & T16 look pretty decent.
I disagree with you (and myself
) on 15. The 1893 topo shows it longer. I amended it but I'm still not sure.
T17 is a little bit futher closer to the US27 bridge.
Where the highway passes over the rail?
T18 is in the right place but might extend a bit further south.
The only lengths I have are the ones from your old website, 1-12 and one other.
(tunnel 27 @ 1,941 Ft.) I'd love to have more if anyone has them.
I relocated 27 to fit a compromise between your map and the 1891 topo.
I'll be revisiting 2-4 & 19-27 when new imagery is available, so close is good for now.
Now ... about 13 & 14. I moved them up, close to the points that you showed.
I've seen your pics of the location. (especially the old bridge pier)
The imagery is good there but I can't locate them exactly. (lengths would help a lot here)
Everywhere that there is a likely location (as over creeks and such) I can clearly see the
rail bed and old tracks. (as here / http://wikimapia.org/#lat=36.410318&lon=-84.5470826&z=20&l=0&m=s&search=tunnel
You've helped a great deal. Thanks.