Pont Llwyngwern (partly in Glantwymyn community) is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 6 December 1999. A C19 Bridge.
Pont Llwyngwern (partly in Glantwymyn community)
- WRENN ID
- grey-quoin-pearl
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 6 December 1999
- Type
- Bridge
- Address
- Pont Llwyngwern (partly in Glantwymyn community), Pantperthog, Corris, Gwynedd
- OS grid reference
- SH 752 044
- Coordinates
- 52.62387, -3.84452
- Source
- Cadw listing
Description
Pont Llwyngwern is a bridge built of fine ashlar, featuring an elliptical arch that spans 12 meters with well-formed voussoirs rising 5.1 meters above the water level to a central raised keystone. The bridge has flush spandrels and a parapet above a horizontal string course. At each end, there are wide slightly battered pilasters, each with a blind pointed arch. The carriageway is level with a formation of 3.8 meters between the low 0.45-meter thick parapets, which are capped with large copings between hipped stones. On the inner face of the bridge, there are oval slate plaques; one side displays a mantled coat of arms dividing the date 1853, while the other side shows the name Pont Llwyngwern. The running surface has been raised, which now partly obscures the fine lettering. The parapets extend to the west entry end and form an oval embayment.
Local climate
Pont Llwyngwern (partly in Glantwymyn community) sits in one of the wettest parts of the UK, with an average of 1,280 mm of rain a year. This makes it wetter than 94% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 91% of listed buildings.
It experiences an average of 38 freeze-thaw cycles a year, more than 73% of listed buildings. Of these, 20 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
More on this building
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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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