Formil Bridge, over the River Formil, Gelvin Road, Dungiven, Co Londonderry

This is a late Victorian bridge built over the River Formil, carrying Gelvin Road. The bridge has sturdy proportions and a bold, well-constructed, almost semi-circular arch spanning approximately 7 metres. The arch is formed of roughly squared, rock-faced voissoirs springing from a projecting string course over vertical supports, with the underside of the vault finished in smooth mortar. The stonework is of coursed rubble. The supporting walls project slightly beyond the bridge abutments to form small breakwaters. The parapet walls, 23 metres long and straight, are finished with round, cement hogsback coping. A blue enamelled metal plaque displays the bridge's name. The Gelvin Road approaches are straight and the surrounding landscape is moorland, partially cultivated, with Gortnamoyagh Forest nearby. The bridge is prominent within this setting.

The bridge appears to have been constructed in the mid-19th century. A ford was indicated at this location on an Ordnance Survey map of 1853 and the bridge itself is shown on an Ordnance Survey map of 1908. The dating from the record has been updated to between 1900 and 1919. The bridge is situated on the boundary line of the ward and Limavady District Council area. The bridge is of industrial archaeological interest.