On this day in 1844, 182 years ago, engineer James Trubshaw laid the first brick in Caldon Tunnel, part of a tramroad serving the limestone quarries of the Staffordshire Moorlands.
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Portals of longer tunnels
Portals of longer tunnels
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Discarded for a younger model next door, Colwall Old Tunnel is one of the country's longest disused bores at 1,567 yards.