Revetment of former Merthyr, Tredegar and Abergavenny Railway at Darrenfelen is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 27 July 2000. Revetment.
Revetment of former Merthyr, Tredegar and Abergavenny Railway at Darrenfelen
- WRENN ID
- inner-transept-bittern
- Grade
- II
- Local Planning Authority
- Brecon Beacons National Park
- Constituency
- Monmouthshire MP: Catherine Fookes (Lab)
- Country
- Wales
- Date first listed
- 27 July 2000
- Type
- Revetment
- Address
- Revetment of former Merthyr, Tredegar and Abergavenny Railway at Darrenfelen, Llanelly, Monmouthshire
- OS grid reference
- SO 217 123
- Coordinates
- 51.80396, -3.13558
- Source
- Cadw listing
Description
The revetment of the former Merthyr, Tredegar and Abergavenny Railway at Darrenfelen is a long, curving structure built from rock-faced masonry. It runs approximately 750 metres in a north-south direction along the steep side of a narrow gorge. At the northern end, there are a pair of round-headed arches made with stone voussoirs that extend out from the sheer rock face. Beyond these arches to the right, the retaining wall is battered and continues for about 150 metres, following a gentle curve and is partly obscured by accumulated spoil. There is a low segmental arch located right of centre, featuring a blue Staffordshire brick arch ring. Towards the right end of the revetment, there is another pair of round arches, followed by a low segmental arch at the extreme right.
Local climate
Revetment of former Merthyr, Tredegar and Abergavenny Railway at Darrenfelen sits in a wetter-than-average part of the UK, with an average of 1,040 mm of rain a year. This makes it wetter than 83% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 75% of listed buildings.
It experiences an average of 48 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 24 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
- No sale records on file
- No related consent applications matched
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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