Bridge over Cwm Trafle S of Prest-dabuan barn is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 14 November 2000. Bridge.

Bridge over Cwm Trafle S of Prest-dabuan barn

WRENN ID
sombre-span-honey
Grade
II
Local Planning Authority
Powys
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
14 November 2000
Type
Bridge
Address
Bridge over Cwm Trafle S of Prest-dabuan barn, Llanwrthwl
OS grid reference
SN 999 605
Coordinates
52.2339, -3.46631
Source
Cadw listing

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

Description

This is a single-carriageway bridge made of rubble stone, located south of the Prest-dabuan barn over Cwm Trafle. It features a single segmental stone arch with hammer-dressed voussoirs, which are set back from the bridge's face behind dressed quoins. The parapets, which are now partly missing, curve outward and end with simple square piers that have also partially fallen. A dated tablet is embedded in the parapet on the upstream side.

Local climate

Bridge over Cwm Trafle S of Prest-dabuan barn sits in a wetter-than-average part of the UK, with an average of 1,130 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 79% of listed buildings.

It experiences an average of 52 freeze-thaw cycles a year, more than 93% 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
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  • 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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