Pont Syr Dafydd is a Grade II listed building in the Caerphilly local planning authority area, Wales. First listed on 23 March 1999. Bridge. 1 related planning application.

Pont Syr Dafydd

WRENN ID
sunken-pinnacle-blackthorn
Grade
II
Local Planning Authority
Caerphilly
Constituency
Newport West and Islwyn MP: Ruth Jones (Lab)
Country
Wales
Date first listed
23 March 1999
Type
Bridge
Address
Pont Syr Dafydd, Rhiw Syr Dafydd, Blackwood, NP12 0JJ
OS grid reference
ST 180 985
Coordinates
51.67952, -3.18614
Source
Cadw listing

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

Description

The building is a single arch bridge, slightly humped in profile, spanning the Sirhowy River. It is constructed of narrow, regularly-laid rubble stone with deeply dressed stone voussoirs featuring a prominent keystone. Only one original flat coping stone remains at the north-east end, with the remainder having been replaced with concrete. The bridge approaches are splayed and have been repaired, and there is an offset in the north-east abutment. The highest point of the bridge is not centred directly above the river arch.

Local climate

Pont Syr Dafydd sits in a wetter-than-average part of the UK, with an average of 1,090 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 79% of listed buildings.

It experiences an average of 44 freeze-thaw cycles a year, more than 85% of listed buildings. Of these, 21 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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 2 transactions since 2019
  • 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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