Aberdulais Viaduct (partly in Tonna community)

Railway viaduct, 5-bays of which 4 span the River Neath, and a 5th bay on the W side spans Station Road. The abutments, belonging to the original bridge opened in 1851, are of coursed hammer-dressed sandstone, while the later arches and parapet are of snecked, rock-faced stone with blue-brick arches. The piers have V-shaped cutwaters with pyramidal caps. Beneath the parapet is a thick projecting blue-brick band. The flat coping is of large bricks. The abutments are battered (with a concave profile beneath the deck) and are splayed outwards to retain an embankment. The abutments also retain vertical slots which housed the original timberwork of Brunel's bridge. The deck carries a single track.