Pont yr Haiarn is a Grade II listed building in the Pembrokeshire Coast National Park local planning authority area, Wales. First listed on 28 October 2004. Bridge.
Pont yr Haiarn
- WRENN ID
- empty-baluster-yew
- Grade
- II
- Local Planning Authority
- Pembrokeshire Coast National Park
- Constituency
- Ceredigion Preseli MP: Ben Lake (PC)
- Country
- Wales
- Date first listed
- 28 October 2004
- Type
- Bridge
- Address
- Pont yr Haiarn, Mynachlog Ddu, Clynderwen, Mynachlog-Ddu
- OS grid reference
- SN 143 286
- Coordinates
- 51.92493, -4.70147
- Source
- Cadw listing
Description
Pont yr Haiarn is a road bridge made of rubble stone, featuring two arches. The arches are constructed with recessed stone voussoirs. There is a cutwater located between the arches on the upstream side. The bridge has rubble parapets that are capped with squared slate blocks placed end-on. It also has long, curving abutments.
Local climate
Pont yr Haiarn sits in a wetter-than-average part of the UK, with an average of 1,150 mm of rain a year. This makes it wetter than 89% 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 18 freeze-thaw cycles a year, fewer than 82% of listed buildings. Of these, 7 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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