The London and South Western Railway built the first span in 1874 to carry its line across this steep valley toward Lydford. Riveted wrought-iron lattice piers and Warren-girder trusses lift it as much as 45 metres above the valley floor. When the railway needed two tracks, a second bridge was added beside the original and braced to it, so the crossing is really a pair of structures. Regular trains beyond Meldon stopped in 1968, but quarry trains kept using the viaduct until the rails were lifted in 1990. The Granite Way took over in 1996, giving this piece of railway engineering a second life.