Railway Viaduct (partly in Llandygai community) is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 9 March 2000. Railway viaduct.
Railway Viaduct (partly in Llandygai community)
- WRENN ID
- roaming-ashlar-evening
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 9 March 2000
- Type
- Railway viaduct
- Address
- Railway Viaduct (partly in Llandygai community), Tre-Felin, Bangor, Llanllechid
- OS grid reference
- SH 602 707
- Coordinates
- 53.21494, -4.09402
- Source
- Cadw listing
Description
The railway viaduct, which is partly located in the Llandygai community, features 14 semi-circular arches. It is constructed from rock-faced and heavily tooled red sandstone masonry, with rusticated voussoirs and quoins. The arches have brick soffits, and there are plinths and freestone impost bands on each pier. The structure includes a cornice and a plain parapet. The end piers slightly project, and the piers next to the river have ramped brick bases.
Local climate
Railway Viaduct (partly in Llandygai community) sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 90% of listed buildings.
It experiences an average of 37 freeze-thaw cycles a year, more than 67% of listed buildings. Of these, 19 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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