Old Cefn Bridge is a Grade II listed building in the Merthyr Tydfil local planning authority area, Wales. First listed on 11 July 1951. Bridge.
Old Cefn Bridge
- WRENN ID
- plain-chancel-spring
- Grade
- II
- Local Planning Authority
- Merthyr Tydfil
- Constituency
- Merthyr Tydfil and Aberdare MP: Gerald Jones (Lab)
- Country
- Wales
- Date first listed
- 11 July 1951
- Type
- Bridge
- Address
- Old Cefn Bridge, Cefn Coed-Y-Cymmer, Gurnos
- OS grid reference
- SO 037 076
- Coordinates
- 51.75897, -3.39639
- Source
- Cadw listing
Description
Old Cefn Bridge is a stone bridge built from coursed rubble. It features a single broad shallow arch made with thin stone voussoirs. The low parapets, also made of rubble stone, have likely been rebuilt and are topped with later iron railings.
Local climate
Old Cefn Bridge sits in one of the wettest parts of the UK, with an average of 1,270 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 85% of listed buildings.
It experiences an average of 54 freeze-thaw cycles a year, more than 94% of listed buildings. Of these, 30 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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