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Pont Llwyngwern (partly in Glantwymyn community)

A Grade II Listed Building in Corris, Gwynedd

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Latitude: 52.6239 / 52°37'25"N

Longitude: -3.8445 / 3°50'40"W

OS Eastings: 275240

OS Northings: 304497

OS Grid: SH752044

Mapcode National: GBR 92.7XR7

Mapcode Global: WH578.X9GT

Entry Name: Pont Llwyngwern (partly in Glantwymyn community)

Listing Date: 6 December 1999

Last Amended: 6 December 1999

Grade: II

Source: Cadw

Source ID: 22754

Building Class: Transport

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

County: Gwynedd

Community: Corris

Community: Corris

Locality: Pantperthog

Traditional County: Merionethshire

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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.

Reasons for Listing

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

Other nearby listed buildings

  • II Pont Llwyngwern (partly in Corris Community)
    The bridge carries the road from the main A487 over the Afon Dulas to Plas Llwyngwern.
  • II Milestone
    The milestone stands in the road verge, near Melin Pantperthog.
  • II Neuadd Bentref
    The building stands back behind the former playground, in the centre of the hamlet of Pantperthog.
  • II Lliwdy
    The house stands beside the driveway to the Esgair Estate, approximately 50m from the main road.
  • II Former slate enamelling workshop, Rhiw'r Gwreiddyn
    Located off the E side of the lane running N into Esgairgeiliog and approx. 0.7km from the village. Facing W into the yard.
  • II Milestone
    The milestone stands in the W verge of the main road near Esgairgeiliog.
  • II Dol-y-dderwin
    The house stands back from the main road to Machynlleth, 1.609 km N of Pont ar Ddyfi.
  • II Gelligan-fawr
    The house stands on high land, approached by a long farm road leading off the A487 Machynlleth to Corris road and running along the Nant Carfan.

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