Bridge at Highlandtown, Garron Road, Carnlough, Ballymena, Co Antrim

This is an early Victorian masonry bridge, likely constructed between 1842 and 1859, carrying Garron Road over a stream near Carnlough, Ballymena, County Antrim. The bridge is attributed to the County Surveyor, Charles Lanyon, and was built as part of the coast road from Glenarm to Cushendall. It is a single arch, segmental in form, built of snecked basalt rubble with dressed sandstone voussoirs and a limestone vault. A limestone platband sits at carriageway level, continuing as raking copings to angled abutments. The copings are partially crumbled at the ends. The western parapet has a face of coursed granite blocks with basalt rock copings, and a rubble finish to its outer face. The eastern parapet is of limestone rubble to the inner face, with basalt boulder copings; its outer face has been strengthened with concrete. The carriageway is flat.

The bridge is located in a rural coastal setting. The inland side features steep grassy banks, while the seaward side is formed of rocks and boulders. Trees have grown above the inland abutments, and the banks on the seaward side have been heavily reinforced with poured concrete. The bridge appears on the 1857 Ordnance Survey map. It possesses industrial archaeological interest.