Pont Gethin is a Grade II* listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 13 October 1966. A Victorian Railway viaduct.
Pont Gethin
- WRENN ID
- waning-eave-larch
- Grade
- II*
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 13 October 1966
- Type
- Railway viaduct
- Period
- Victorian
- Address
- Pont Gethin, Dolwyddelan, Conwy
- OS grid reference
- SH 779 538
- Coordinates
- 53.0681, -3.82275
- Source
- Cadw listing
Description
Pont Gethin is a railway viaduct that measures 326 meters in length and features a 24-meter main arch over the river Lledr, along with six smaller arches, the first of which spans the A 470 at an angle. The structure is built from massive local slatestone blocks that are snecked and rough-shaped, with dressings made from Penmaenmawr stone and red brick soffits. The arches consist of dressed voussoirs beneath plain archrings and are topped with a sham-machicolated parapet that has shallow steps and 'arrow slits' above the arches, along with plain capping. On either side of the main arch and the grouped lesser arches are semi-circular turrets that contain refuges, which are decorated with battlements in three tiers above. An inscription reading 'O Gethin D Jones, Penmachno, 1879' is incised into a block on one of the turrets that flank the road.
Local climate
Pont Gethin sits in one of the wettest parts of the UK, with an average of 1,200 mm of rain a year. This makes it wetter than 91% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 84% of listed buildings.
It experiences an average of 45 freeze-thaw cycles a year, more than 86% of listed buildings. Of these, 27 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°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.
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- No sale records on file
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- 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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