Pont y Forwyn is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 2 March 2004. Bridge.
Pont y Forwyn
- WRENN ID
- sombre-shingle-coral
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 2 March 2004
- Type
- Bridge
- Address
- Pont y Forwyn, Llansantffraid-Ym-Mechain Village, Llansantffraid
- OS grid reference
- SJ 208 204
- Coordinates
- 52.77603, -3.17405
- Source
- Cadw listing
Description
Pont y Forwyn is a single arch bridge built in local shaley stone, featuring a segmental form with a span of approximately 10 meters. The bridge has plain voussoirs that do not distinguish the keystone. At the base of the parapets, there is a simple string course.
The carriageway measures about 6 meters in width and is flanked by narrow orthostat parapets that slightly taper and have a top chamfer. There is a slight pier at each corner of the bridge.
Local climate
Pont y Forwyn receives an average of 890 mm of rain a year. This makes it wetter than 66% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 56% of listed buildings.
It experiences an average of 43 freeze-thaw cycles a year, more than 84% of listed buildings. Of these, 24 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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