Bont Dolgadfan is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 31 January 1997. Bridge. 1 related planning application.

Bont Dolgadfan

WRENN ID
gaunt-span-scarlet
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
31 January 1997
Type
Bridge
Address
Bont Dolgadfan, Llanbrynmair, SY19 7BB
OS grid reference
SH 886 002
Coordinates
52.58825, -3.64518
Source
Cadw listing

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

Description

Bont Dolgadfan is a bridge, probably from the 18th century, constructed of local rubble stone. It features a single segmental arch that spans the river, which is confined to a narrow deep channel. The arch is made of a single ring of large stone voussoirs, set below a capping string that is flush with the spandrels, rising continuously to the parapet, which has a flush coping made of large stone blocks. Additionally, the bridge has buttressing walls that were added on the upstream side.

Local climate

Bont Dolgadfan sits in one of the wettest parts of the UK, with an average of 1,190 mm of rain a year. This makes it wetter than 91% 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 47 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 27 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
  • Sale history — 1 transaction since 2018
  • Related listed building consents — 1 application
  • 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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