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BH Photo #267503
I recently found out that my 2X Great Grandfather worked on these tunnels in the 1860s. Apparently, he helped repair the old wooden liners and then helped with the process of lining the tunnels with stone and brick.
His memoir does not say specifically which tunnels he worked on, but he was living in Cornwallis at the time. Many of the tunnels between Cornwallis and Cairo were short and got daylighted in the mid 1900s.
He did mention walking from Parkersburg to Cairo via the railroad once. His trek took him to (likely through) the Silver Run Tunnel west of Cairo and he mentioned that tunnel in his memoir.