Joseph Mitchell, chief engineer, 1861-3. High 7-span viaduct. Bull-faced rubble, tooled ashlar dressings. 7 bull-faced rubble arch rings supported by tall piers of similar masonry; approach causeways flanked by castellated turrets with dummy arrow slits; octagonal crenellated end piers. Coped parapet with mirrored plaques at centre, facing railway track. [HS]. Clear width 7 x 13,7 m, clear height 32 m, width between parapets 4,30 m.