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Cof Cymru: National Historic Assets of Wales · Wales

Pont Pedair-ffordd

Llanrhaeadr-ym-Mochnant, Powys, Wales

The record

Designation
Listed building, Grade II
Broad class
Communications
Date of designation
14 August 2003
Locality
Tanat Valley
Community
Llanrhaeadr-ym-Mochnant
Unitary authority
Powys
Country
Wales
Coordinates
52.81080, -3.31359
Cadw reference
81784

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 1795 "To Sir Watkin Williams-Wynn Bart ... the map of the six counties of North Wales is most humbly inscribed by his obedient humble servant" (Llyfrgell Genedlaethol Cymru – The National Library of Wales).

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This record in Cadw's own full report ↗

Cadw's description

On the River Tanat, about 150m south of Pedair-ffordd and 1.5km south -west of the village of Llanrhaeadr-ym-Mochnant.

Probably late C18. Marked on the Tithe Plan, 1842. Also known as Castellmoch Bridge or Pontfawr Castellmoch. It was a Hundred bridge, maintained by the Hundred of Llanfyllin until 1821 and then adopted as a County bridge. The parapets are of a type common on County bridges and may be of later date.

A four-arch stone bridge of about 35 m by about 6 m wide. The arches are of high segmental form, with voussoirs about 400 mm in height. The piers are marked by shallow broad buttresses with cutwaters on the upstream side and buttresses and probably remnants of cutwaters downstream also. The common masonry is local quasi-rubble slate, uncoursed, and the parapets, the string course at the base of the parapets, and the copings of the buttresses, are in sandstone.

The parapets are formed of thin orthostat blocks of slightly tapering form with a pecked finish, about 800 mm high and about 150 mm wide at the top, and have slight end-piers. At the downstream side the parapets are slightly out-turned at the ends.

A well-preserved four-arch Hundred bridge.

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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