Several weekends ago, I rediscovered the circa 1882 Tunnels No. 1 and No. 2 along the Toledo, Cincinnati & St. Louis Railroad (TC&StL) in southern Ohio.
The TC&StL was then absorbed by the Cincinnati, Hamilton & Dayton Railroad in 1891. Work to concrete line Tunnel No. 2 began in 1916 but it was never finished as flooding destroyed much of the line north of here.
While Tunnel No. 1 is completely flooded, Tunnel No. 2 is in a state of collapse. Through careful wading through 4 feet of water, I was able to climb up the collapsed portion of the tunnel and squeeze through – discovering that the entire tunnel length is traversable!