Llansamlet Railway Underbridge is a Grade II listed building in the Swansea local planning authority area, Wales. First listed on 5 April 2016. Bridge.

Llansamlet Railway Underbridge

WRENN ID
heavy-ledge-heron
Grade
II
Local Planning Authority
Swansea
Constituency
Neath and Swansea East MP: Carolyn Harris (Lab)
Country
Wales
Date first listed
5 April 2016
Type
Bridge
Address
Llansamlet Railway Underbridge, Station Road
OS grid reference
SS 690 973
Coordinates
51.65941, -3.89451
Source
Cadw listing

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

Description

The Llansamlet Railway Underbridge is a railway bridge featuring a single span and made of masonry. It has projecting wingwalls and is constructed from coursed and squared rock-faced sandstone, with rusticated voussoirs. The bridge includes a low parapet that has been fitted with replaced coping and later metal railings. The wingwalls are plain and slope down to the south, while the north-east wingwall slopes down to a terminating pier.

Local climate

Llansamlet Railway Underbridge sits in one of the wettest parts of the UK, with an average of 1,400 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 97% of listed buildings.

It experiences an average of 21 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 8 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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  • 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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