Pont Cwmmawr-du is a Grade II listed building in the Carmarthenshire local planning authority area, Wales. First listed on 13 September 2002. Bridge.

Pont Cwmmawr-du

WRENN ID
inner-hall-cobweb
Grade
II
Local Planning Authority
Carmarthenshire
Constituency
Caerfyrddin MP: Ann Davies (PC)
Country
Wales
Date first listed
13 September 2002
Type
Bridge
Address
Pont Cwmmawr-du, Gwernogle, Llanfihangel Rhos-Y-Corn
OS grid reference
SN 534 327
Coordinates
51.97377, -4.1348
Source
Cadw listing

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

Description

Pont Cwmmawr-du is a single-carriageway, single-span bridge made of rubble stone, dating from 1838. It features a segmental arch that is slightly recessed from the abutments, with narrow freestone voussoirs. The bridge has a simple parapet topped with saddleback coping, which has been replaced with concrete. On the upstream parapet, there is a stone tablet that reads, "This bridge built by the expence of T.H. Jones Esq Neuadd Fawr AD 1838." The parapets are splayed out at the ends, supported by corbelled stonework on the left (east) bank on the upstream side. On the right (west) bank, the abutment curves out on the upstream side, while on the left bank, the abutment curves out on the downstream side.

Local climate

Pont Cwmmawr-du sits in one of the wettest parts of the UK, with an average of 1,310 mm of rain a year. This makes it wetter than 95% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 92% of listed buildings.

It experiences an average of 35 freeze-thaw cycles a year, more than 56% of listed buildings. Of these, 16 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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