Llangynidr Bridge (partly in Llanfihangel Cwmdu with Bwlch and Cathedine community) is a Grade I listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 4 January 1952. Bridge.

Llangynidr Bridge (partly in Llanfihangel Cwmdu with Bwlch and Cathedine community)

WRENN ID
night-rubblework-pearl
Grade
I
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
4 January 1952
Type
Bridge
Address
Llangynidr Bridge (partly in Llanfihangel Cwmdu with Bwlch and Cathedine community), Coed Yr Ynys, Powys
OS grid reference
SO 152 202
Coordinates
51.87446, -3.23305
Source
Cadw listing

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

Description

Llangynidr Bridge is a high single-carriageway road bridge made of rubble stone, featuring six segmental arches that curve into the current and ramp towards the center. V-shaped cutwaters rise to the full height of the parapet and create refuges. The parapet has plain copings, and on the south side, it curves outwards at the ends above corbelled stone.

Local climate

Llangynidr Bridge (partly in Llanfihangel Cwmdu with Bwlch and Cathedine community) sits in a wetter-than-average part of the UK, with an average of 1,100 mm of rain a year. This makes it wetter than 87% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 74% 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.

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