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Rannoch Viaduct

The Rannoch Viaduct lies on the West Highland Railway Line and is some 208m (227 yards) long, second only in length to the better known Glenfinnan Viaduct on this line. It comprises a lattice girder structure, which follows a gentle curve, supported by nine locally-quarried granite piers. Given the boggy ground conditions, deep foundations were required to reach the boulder clay which lay beneath the peat. Like the rest of this railway, its construction was overseen by Sir Robert McAlpine (1847 - 1934), but the viaduct was designed by engineers Formans & McCall of Glasgow, built by Lucas & Aird of London with steel-work by Alexander Findlay & Co of Motherwell. This section of the line was opened in 1894.


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