The viaduct was built by Monmouthshire Railway (& Canal Company). It is a four semi-circular 12.2 meters (40 feet) arched viaduct on a very sharp curve, climbing at 1 in 48. The tall piers are composed of squared rubble, with red brick linings, and one arch with an extra lining of blue brick. The viaduct opened in 1879 to Talywain (Abersychan).

Claire Parry, RCAHMW, 26 July 2011

Source: A Guide to the Industrial Archaeology of South East Wales, AIA, 2003)