Moore's Bridge, Hillsborough Road, Lisburn, Co Antrim

A triple-span masonry arch bridge carries the main Lisburn-Hillsborough road over the River Lagan. The abutments and piers are of roughly-dressed basalt blocks laid to regular courses. The arches are of equal size and of three-centred (‘semi-elliptical’) profile. Their voussoirs are of vee-jointed cut sandstone. The soffits have been gunited. The right-bank (SW) arch is dry in normal circumstances. The remaining two arches span the river and the left-bank (NE) arch also spans the former Lagan Navigation towpath (now a public footpath). There are semicircular cutwaters to the piers on both up- and downstream faces, being a continuation of the piers and of identical construction. The cutwaters rise to just above arch spring level and originally had projecting sandstone caps. Excepting one of the piers on the downstream face, these caps have weathered and been replaced with brick. The spandrels are of ashlar Triassic sandstone, delineated at each end by a shallow basalt pilaster which extends up to the projecting parapet terminal piers. A sandstone string course runs across each face, just above arch crown level. The parapets are of quarried random rubble with rounded dressed sandstone copings and terminate in projecting basalt piers capped with sandstone. The carriageway carries two lines of traffic and two footpaths. Just beyond the end of the downstream parapet, at its left-bank end, a flight of concrete steps leads down to the public footpath along the river. A galvanised metal hand rail runs along the top of a random rubble wall down the side of the staircase. The footpath through the left-bank arch also has a galvanised metal handrail along its river side. On the road side of the downstream parapet, directly above the crown of the middle arch, is a cast-iron post carrying the legend “Lisburn Town Council”. The post is of circular cross-section with an octagonal cap. It also marks the county boundary between Antrim and Down.