Railway Bridge at Treble Hill is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 15 December 1995. Warehouse.
Railway Bridge at Treble Hill
- WRENN ID
- idle-plinth-mist
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 15 December 1995
- Type
- Warehouse
- Address
- Railway Bridge at Treble Hill, Gwernyfed
- OS grid reference
- SO 181 390
- Coordinates
- 52.04391, -3.1948
- Source
- Cadw listing
Description
The railway bridge at Treble Hill was built around 1864-1865 for the Hereford, Hay and Brecon Branch of the Mid-Wales Railway. It is constructed from rock-faced ashlar sandstone, with the corners and features having a margin-draughted finish, and the vault made of brick. The bridge features a tall semi-circular arch that rises from a projecting string course, with pronounced voussoirs and keystones. It is flanked by piers that have pilasters standing forward of the sharply curved flank retaining walls of the embankment. A limestone cornice and caps adorn the pilasters. The bridge remains in its original condition on the northwest side, while the southeast side has a slightly extended parapet made of iron.
Local climate
Railway Bridge at Treble Hill sits in a wetter-than-average part of the UK, with an average of 1,030 mm of rain a year. This makes it wetter than 82% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 68% of listed buildings.
It experiences an average of 52 freeze-thaw cycles a year, more than 93% of listed buildings. Of these, 29 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
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