Pont Hafren is a Grade II listed building in the Isle of Anglesey local planning authority area, Wales. First listed on 5 April 1971. A 18th century Road bridge.
Pont Hafren
- WRENN ID
- brooding-nave-bracken
- Grade
- II
- Local Planning Authority
- Isle of Anglesey
- Constituency
- Ynys Môn MP: Llinos Medi (PC)
- Country
- Wales
- Date first listed
- 5 April 1971
- Type
- Road bridge
- Period
- 18th century
- Address
- Pont Hafren, Llantrisant, Holyhead, Tref Alaw
- OS grid reference
- SH 347 844
- Coordinates
- 53.33116, -4.48281
- Source
- Cadw listing
Description
Pont Hafren is an 18th-century road bridge that crosses the Afon Alaw, marking the boundary between the parishes of Llanddeusant and Llantrisant. The bridge is constructed of rubble masonry and features a main arch, along with a smaller arch to the west. The arches are made with roughly dressed voussoirs that are slightly inset below the extrados course, which consists of narrow slabs. The bridge has a rough parapet.
Local climate
Pont Hafren sits in a wetter-than-average part of the UK, with an average of 1,030 mm of rain a year. This makes it wetter than 83% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 93% of listed buildings.
It experiences an average of 8 freeze-thaw cycles a year, fewer than 93% of listed buildings. Of these, 3 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.
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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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