Pont Rhydlydan is a Grade II listed building in the Conwy local planning authority area, Wales. First listed on 19 October 1998. Bridge.

Pont Rhydlydan

WRENN ID
forbidden-flint-saffron
Grade
II
Local Planning Authority
Conwy
Constituency
Bangor Aberconwy MP: Claire Hughes (Lab)
Country
Wales
Date first listed
19 October 1998
Type
Bridge
Address
Pont Rhydlydan, Pentrefoelas
OS grid reference
SH 892 508
Coordinates
53.0433, -3.65316
Source
Cadw listing

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

Description

Pont Rhydlydan is a bridge made of rubble stonework, featuring a single segmental arch that spans approximately 10.9 meters between low abutments over the Afon Merddwr. The arch consists of a single ring of voussoirs that are 0.5 meters deep, set back under a projecting regulating course, and it does not have a central keystone. The arch rises 3.4 meters above the water level. The bridge has flush spandrels and a parapet that turns sharply to end in square piers, with flush copings. The carriageway is humped and measures 5.7 meters wide between the 0.5-meter thick parapets. On the inside of the parapet, there is a datestone that reads EI ILL 1815.

Local climate

Pont Rhydlydan sits in one of the wettest parts of the UK, with an average of 1,240 mm of rain a year. This makes it wetter than 92% 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 48 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 29 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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  • Sale history — 1 transaction since 2021
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  • 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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