Pont-sarn is a Grade II listed building in the Merthyr Tydfil local planning authority area, Wales. First listed on 22 August 1975. Bridge.

Pont-sarn

WRENN ID
solemn-baluster-sunrise
Grade
II
Local Planning Authority
Merthyr Tydfil
Constituency
Merthyr Tydfil and Aberdare MP: Gerald Jones (Lab)
Country
Wales
Date first listed
22 August 1975
Type
Bridge
Address
Pont-sarn, Pontsarn, Vaynor
OS grid reference
SO 045 097
Coordinates
51.77823, -3.38536
Source
Cadw listing

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

Description

Pont-sarn is a bridge constructed from rock-faced limestone blocks. It features a single shallow segmental arch with limestone voussoirs. The parapets, which extend along the southwest side of the road, have rock-faced limestone coping that has been repaired with cement in some areas and reinforced with iron rails on the west side. The roadway measures approximately 2.7 meters in width.

Local climate

Pont-sarn sits in one of the wettest parts of the UK, with an average of 1,270 mm of rain a year. This makes it wetter than 94% 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 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.

More on this building

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Nearby listed buildings

  1. Pont-Sarn Grade II 3 m
  2. Road bridge near former Pontsarn Station Grade II 156 m
  3. Pontsarn Railway Viaduct (also in Pant Community) Grade II* 170 m
  4. Pontsarn Railway Viaduct (also in Vaynor) Grade II* 172 m
  5. Hy Brasail Grade II 483 m
  6. Tower of Old Church of St Gwynno Grade II 619 m
  7. Gravestone of Robert Thompson Crawshay and surrounding railings Grade II 681 m
  8. Fingerpost near Church of St Gwynno Grade II 934 m
  9. Blaenygarth Grade II 1.5 km
  10. Centre ventilation shaft to Morlais Tunnel Grade II 1.6 km