Road over railway Bridge, Ballinderry Road, Lisburn, Co Antrim, BT 28

Acutely skewed four-arch brick and stone bridge carrying the Ballinderry Road over the main Belfast-Dublin railway. It is aligned NW-SE across the line. The arch at the NW end spans now disused Lisburn-Antrim line. The next arch spans the ‘down’ line from Dublin to Belfast, and the one beside it the ‘up’ line from Belfast to Dublin. The arch at the SE end was never used and is blocked at both ends by a galvanized steel fence. The abutments are of roughly-faced random sandstone blocks laid to courses. Their quoins are embellished with tooled edges and topped with concrete. Similarly detailed pilasters form buttresses at both ends and rise to out-projecting piers at the ends of the parapets. The piers are of red brick construction with cement-rendered concrete ends. Each pier has a semicircular arched opening through the middle to facilitate access between the arches. The arch soffits are of skewly laid purple brick with four soldier courses forming the voussoirs. The spandrels are of roughly-faced random sandstone blocks with a rusticated/margined sandstone string course over and around the parapet terminal piers. The angled wing walls are also of roughly-dressed random sandstone blocks coped with purple brick (with rounded edges). The parapets are of red brick and upwards of 1.8m high. Their road faces are rendered with cement. Their original purple brick copings survive along the NE side but have been replaced with concrete on the opposite side. Their terminal piers are capped with cast concrete (original). The approaches are ramped up at both ends of the bridge. The curved deck carries two lanes of traffic and a footpath. Just beyond the NE and SW ends of the bridge are raised concrete platforms which were formerly associated with Knockmore Station, now closed. The SW platform was accessed along the line of the original road which crossed the line here as a level crossing. The NE platform is accessed by a tarmaced ramp just beyond the NE end of the bridge. A modern steel security fence now runs along each side of the line.