Pont Dyffryn is a Grade II listed building in the Ceredigion local planning authority area, Wales. First listed on 23 May 1996. Commercial building.

Pont Dyffryn

WRENN ID
tattered-glass-dew
Grade
II
Local Planning Authority
Ceredigion
Constituency
Ceredigion Preseli MP: Ben Lake (PC)
Country
Wales
Date first listed
23 May 1996
Type
Commercial building
Address
Pont Dyffryn, Pontrhydsaeson, Dyffryn Arth
OS grid reference
SN 541 628
Coordinates
52.24471, -4.13734
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Pont Dyffryn is a road bridge built in 1847 by Thomas Penson. It is one of three distinctive masonry bridges leading to Pontrhydsaeson, alongside Pont Rhydsaeson and Pont Glanbran.

The bridge features squared rubble stone and has a single elliptical arch with a shallow profile. The arch is accentuated by raised rectangular voussoirs and a large raised keystone. Above the keystone, there is a flat raised band that runs beneath a flat parapet, which is topped with heavy squared coping stones. The ends of the bridge curve slightly outward to raised piers, with a band carried across them.

Pont Dyffryn is recognized as part of a unique group of high-quality masonry bridges designed by Thomas Penson and his son R.K. Penson. This group includes other notable bridges such as Pont Aberarth from 1849 and Pont Pennant from 1850. The bridge has a span of 32 feet and was rebuilt according to the plans of Thomas Penson, with David Morgan of Cardigan as the builder.

Local climate

Pont Dyffryn sits in one of the wettest parts of the UK, with an average of 1,290 mm of rain a year. This makes it wetter than 94% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 92% of listed buildings.

It experiences an average of 34 freeze-thaw cycles a year, fewer than 52% of listed buildings. Of these, 17 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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  1. Dyffryn Arth Grade II 98 m
  2. Pont Rhydsaeson Grade II 245 m
  3. Milestone on B4337 Grade II 738 m
  4. Pont Glanbran ( Partly in Ciliau Aeron Community) Grade II 934 m
  5. Pont Glanbran ( Partly in Dyffryn Arth community) Grade II 937 m
  6. Bronwenau Grade II 991 m
  7. Outbuilding on W side of yard at Llain Grade II 1.4 km
  8. Stable and Cart-Shed range at Llain Grade II 1.5 km
  9. Parcau Grade II 1.7 km
  10. Multi-purpose farm building at Trefaes Uchaf Grade II 2.3 km