Pont Fawr is a Grade II* listed building in the Gwynedd local planning authority area, Wales. First listed on 20 October 1966. Bridge.
Pont Fawr
- WRENN ID
- woven-mantel-auburn
- Grade
- II*
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 20 October 1966
- Type
- Bridge
- Address
- Pont Fawr, Llandderfel
- OS grid reference
- SH 981 365
- Coordinates
- 52.91712, -3.51553
- Source
- Cadw listing
Description
Pont Fawr is a fine road bridge featuring four arches, with the two central arches being taller and wider than the flanking ones. It is constructed of rubble, and the arches are of a wide segmental type, with rough-dressed voussoirs set back below the arch rings made of narrow stones. Both the upstream and downstream sides of the bridge have triangular cutwaters. The rubble parapets are topped with slate-slab copings and continue as revetment parapets that flank the road as it curves to the east at the southern end of the bridge. At the northern end, the upstream parapet curves to the west, creating a squinch effect due to modern widening at this location.
Local climate
Pont Fawr sits in a wetter-than-average part of the UK, with an average of 1,120 mm of rain a year. This makes it wetter than 88% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 74% of listed buildings.
It experiences an average of 54 freeze-thaw cycles a year, more than 95% of listed buildings. Of these, 34 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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