Pont yr Afanc is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 30 May 1996. Bridge.
Pont yr Afanc
- WRENN ID
- moated-gravel-thyme
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 30 May 1996
- Type
- Bridge
- Address
- Pont yr Afanc, Pont Yr Lledr, Bro Garmon, Conwy
- OS grid reference
- SH 798 546
- Coordinates
- 53.07568, -3.7954
- Source
- Cadw listing
Description
Pont yr Afanc is a large single-span road bridge built around 1800, which was noted as new by Richard Fenton in 1810 when it was referred to as Pont Llyn Afanc. The bridge features a segmental arch measuring approximately 30 meters and is constructed from snecked, rusticated blocks, with fine voussoirs and soffit, and projecting keystones. Below the arch, there is a plain string-course that supports a slab-coped rubble parapet. The approaches to the bridge are splayed, with battered abutments that end in simple buttresses. This bridge is a significant and imposing example of early 19th-century road architecture.
Local climate
Pont yr Afanc 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 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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