1 vote

CNTP - Tunnel 20


The number stone on the north portal of Tunnel 20.

Photo taken by Alex Wood in November 2012


BH Photo #243887



CNO&TP Tunnel 20, originally bored in 1878. Was bypassed in the late 1940's during the double tracking of the railroad between CW Tower and Robbins. The tunnel is far out in the woods and requires hiking via some backwoods trails to get to it. Make sure you wear orange! It is also accessible by hiking up the mountain side from Highway 27 and crossing the current railroad tracks on foot, which requires caution. This tunnel does not sit directly next to the current railroad grade like sister T19. The former grade running south of the tunnel veers to the west quite a bit before lining back up with the current grade to make the run towards Rock Creek bridge and former Tunnel 21.


Abandoned tunnel
Morgan County, Tennessee
Built in 1878 by the Cincinnati, New Orleans & Texas Pacific Railroad in cooperation with the city of Cincinnati, Ohio
- Cincinnati Southern Railway (CNTP)
- Cincinnati, New Orleans, & Texas Pacific Railway (CNO&TP; CNTP)
Tunnel made of limestone stacked walls and brick masonry lined roof. At one time had thin concrete coating on bricks. Stacked limestone portals. Packed dirt/rock flooring.
Total length: 0.9 ft.
Deck width: 15.0 ft.
Vertical clearance above deck: 20.0 ft.
Also called
Cincinnati Southern Tunnel 20
CS #20
Approximate latitude, longitude
+36.14307, -84.64659   (decimal degrees)
36°08'35" N, 84°38'48" W   (degrees°minutes'seconds")
Approximate UTM coordinates
16/711742/4002382 (zone/easting/northing)
Quadrangle map:
Pilot Mountain
Inventory number
BH 54687 (Bridgehunter.com ID)

Update Log 

  • November 30, 2012: Added by Alex Wood


  • Alex Wood


CNTP - Tunnel 20
Posted October 5, 2017, by Robert Elder (robertelder1 [at] gmail [dot] com)

Yep, I think that we have a misprint...

CNTP - Tunnel 20
Posted October 5, 2017, by Oliver

..........That's only .1612 Smoot........

CNTP - Tunnel 20
Posted October 5, 2017, by David (volcrano [at] gmail [dot] com)

This tunnel is listed as 0.9 feet long, which seems short.