Former Tramroad Bridge (partly in Pontllanfraith Community) is a Grade II listed building in the Caerphilly local planning authority area, Wales. First listed on 23 March 1999. Bridge.
Former Tramroad Bridge (partly in Pontllanfraith Community)
- WRENN ID
- slow-slate-acorn
- 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
- Former Tramroad Bridge (partly in Pontllanfraith Community), Cwm Philkins, Penmaen
- OS grid reference
- ST 182 967
- Coordinates
- 51.6632, -3.18301
- Source
- Cadw listing
Description
The Former Tramroad Bridge is a narrow but deep angled bridge that once carried a tramroad and later a railway across a narrow lane. It is constructed of rubble stone, featuring roughly dressed voussoirs, quoins, and a keystone, with areas of rockfaced stone where it has been rebuilt, along with some blue brick repairs. The east-facing side, which slopes uphill, has putlog or drainage holes. A near right-angled sloping abutment is built against the arch's voussoirs, while the wall to the left acts as a revetment to the steep bank and is much wider. Both sides have close-set rubble coping, a shallow offset at the base and above the narrow arch, and a projecting coping that supports the later parapet made of rockfaced stone. The west-facing side is asymmetrical as well, with a wide curving revetment to the left, a narrow offset at the impost level, and a slanting abutment with a brick buttress to the right. Each side features moulded brick coping. The parapet is not centrally aligned over the tunnel arch. Additionally, there is a break in the vault, with the final uphill fifth section at a higher level, likely to accommodate the rising ground.
Local climate
Former Tramroad Bridge (partly in Pontllanfraith Community) 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.
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- No EPC on record for this property
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- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
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