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Cof Cymru: National Historic Assets of Wales · Wales

Pont Llwyngwern (partly in Glantwymyn community)

Corris, Gwynedd, Wales

The record

Designation
Listed building, Grade II
Broad class
Transport
Date of designation
6 December 1999
Locality
Pantperthog
Community
Corris
Unitary authority
Gwynedd
Country
Wales
Coordinates
52.62386, -3.84451
Cadw reference
22754

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

The bridge carries the road from the main A487 over the Afon Dulas to Plas Llwyngwern.

Plas Llwyngwern is a gentry house in Powys (Glantwynmyn community), connected to the main N-S road through the Dulas valley. The bridge was built in 1853 and now serves as the approach to the Centre for Alternative Technology.

Built of fine ashlar. An elliptical arch spanning 12m of well-formed voussoirs rising 5.1m above water level to a central raised keystone. Flush spandrels and parapet above a horizontal string course. At each end, wide slightly battered pilasters, each articulated with a blind pointed arch. The carriageway is level with a formation of 3.8m between the low 0.45m thick parapets, each capped with large copings between hipped stones. On the inner face, oval slate plaques; on one side a mantled coat of arms dividing the date 18 53, and on the other the name Pont Llwyngwern. The running surface has been raised and now partly obscures the fine lettering. The parapets extend to the W, entry, end, and form an oval embayment.

Included as an elegant and well-constructed road bridge of high quality, built by the owners of a local slate industry.

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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