Berriew Aqueduct was built between 1794 and 1797 as part of the original engineering of the Montgomeryshire Canal (engineered by John and Thomas Dadford), but the original masonry structure was re-faced in extensive restoration work in 1889, carried out by the Shropshire Union Railways and Canal Company. The aqueduct was built of blue and red engineering brick with stone dressings, two arches span Afon Rhiw, these are flanked by two small bore road tunnels.
RCAHMW 2007