Western Portal of Penmaen Rhos Railway Tunnel is a Grade II listed building in the Conwy local planning authority area, Wales. First listed on 9 September 1994. Railway tunnel portal.
Western Portal of Penmaen Rhos Railway Tunnel
- WRENN ID
- dusk-steel-soot
- Grade
- II
- Local Planning Authority
- Conwy
- Constituency
- Clwyd North MP: Gill German (Lab)
- Country
- Wales
- Date first listed
- 9 September 1994
- Type
- Railway tunnel portal
- Address
- Western Portal of Penmaen Rhos Railway Tunnel, Old Colwyn
- OS grid reference
- SH 879 786
- Coordinates
- 53.29293, -3.68297
- Source
- Cadw listing
Description
The Western Portal of the Penmaen Rhos Railway Tunnel is a Grade II listed structure made of white limestone. It features ashlar stonework over the arch, with rusticated detailing on the terminal piers and coursed and squared stone on the parapet. The portal has a shallow segmental arch topped with a stepped moulded cornice, situated between terminal turretted piers. These piers are rectangular in shape and have machicoated embattled heads.
Local climate
Western Portal of Penmaen Rhos Railway Tunnel sits in a wetter-than-average part of the UK, with an average of 1,050 mm of rain a year. This makes it wetter than 85% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 70% of listed buildings.
It experiences an average of 31 freeze-thaw cycles a year, fewer than 63% 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.
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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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