Pont-ar-fran Bridge is a single arched stone ashlar bridge crossing Nant Fran, 4.5km west of Brecon, apparently re-built in 1823 by Benjamin James. It has a span of 8m and a carriage-way nearly 4m wide. The arch, which has a slightly projecting key-stone, is framed in a squared recess. The bridge is of a good quality and condition and carries a minor road between Trallong and Aberyscir.
(Sources: NMR Site files, DB Hague; CADW listed buildings database, 17 January 1963).
Ian Archer, RCAHMW, 25th February 2005