Johnstown Bridge

Single-arch rubble stone road bridge over river, c.1850, with rock-faced cut-stone voussoirs and cut-stone stringcourses. Coursed rubble stone walls and parapet walls. Cut-stone stringcourses to spring of arch and to crest of arch. Cut-stone coping. Single segmental arch. Rock-faced cut-stone voussoirs. Rubble stone soffits with traces of render over. Sited spanning River Blackwater. Grass banks to river.

Johnstown bridge is a fine stone bridge that forms an imposing feature on the River Blackwater and is one of a group of bridges on the section of that river that passes through County Kildare. The construction of the arch that has retained its original shape is of technical and engineering merit. The bridge exhibits good quality stone masonry and fine, crisp joints. The bridge is of considerable historical and social significance as a reminder of the road network development in Ireland in the mid nineteenth century.