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Cof Cymru: National Historic Assets of Wales · Wales

Cefn Brynich Canal Bridge Aqueduct

Llanfrynach, Powys, Wales

The record

Designation
Listed building, Grade II*
Broad class
Transport
Date of designation
17 January 1963
Locality
Cefn Brynich
Town
Brecon
Community
Llanfrynach
Unitary authority
Powys
Country
Wales
Coordinates
51.93653, -3.34089
Cadw reference
6763

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1608 "(13) Cambriae Typus." (David Rumsey Map Collection, Stanford Libraries).

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This record in Cadw's own full report ↗

Cadw's description

Situated crossing the Usk some 180m downstream of the Lock Bridge on the road to Llanfrynach.

Aqueduct carrying the Brecon & Abergavenny Canal over the Usk. the canal was empowered by an act of 1793, work began 1797, the last ten miles to Brecon completed 1800. The original surveyor for the canal was Thomas Dadford Sr, engineer to the Monmouthshire Canal and his sons John and Thomas Jr supervised the work. Thomas Dadford Jr probably designed this aqueduct. Renovated 1996-7.

Canal aqueduct, rubble stone, four broad elliptical arches with stone voussoirs, some arches lined in black brick (late C19 or early C20). Low piers of squared stone with cutwaters, raised band at level of arch springing, then cutwaters continue up and are then chamfered off at height of arch crowns. Above are flat piers reaching up to just below level of base of parapet. Raised piers each side of outer arches and ends curve outward. Parapet is on the W side only.

Graded II* as one of the major engineering achievements of the South Wales canals.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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