Llanelltyd Bridge is a stone construction which carried the former A470 trunk road over the Afon Mawddach; it has five elliptical arches and triangular cutwaters and is thought to date to the second quarter of the eighteenth century. Increasing traffic and the narrowness of the bridge prompted the erection of a Bailey bridge on the eastern side but this was removed when a new concrete bridge was constructed in the 1980s to carry the road on a new alignment some 150m to the west. The old bridge no longer carries motor traffic but is in use as a footbridge. Reference: https://coflein.gov.uk/en/site/95424/