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RJ Corman's Cumberland City turn at Palmyra Railroad Tunnel Photograph by Jim Pearson - Fine Art America
Cumberland Gap Railroad Tunnel, Tracks Leading into | Flickr
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Cowan Tunnel - Wikipedia
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Bridgehunter.com | CSX - Cumberland Gap Tunnel
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Group chisels away at task of opening old railroad tunnel below Pound Gap - The Mountain Eagle
railroad tunnel – Blogging the Railroad Tunnels
Cumberland Gap Tunnel - Wikipedia
