Aberdulais Viaduct (partly in Blaenrhonddan community) is a Grade II listed building in the Neath Port Talbot local planning authority area, Wales. First listed on 25 February 2000. Viaduct.

Aberdulais Viaduct (partly in Blaenrhonddan community)

WRENN ID
peeling-lintel-curlew
Grade
II
Local Planning Authority
Neath Port Talbot
Constituency
Neath and Swansea East MP: Carolyn Harris (Lab)
Country
Wales
Date first listed
25 February 2000
Type
Viaduct
Address
Aberdulais Viaduct (partly in Blaenrhonddan community), Blaenhonddan
OS grid reference
SS 772 992
Coordinates
51.67847, -3.77644
Source
Cadw listing

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

Description

The Aberdulais Viaduct is a 5-bay structure, with 4 bays spanning the River Neath and a 5th bay on the west side that crosses Station Road. The abutments, which are part of the original bridge opened in 1851, are made of coursed, hammer-dressed sandstone. The later arches and parapet are constructed from snecked, rock-faced stone featuring blue-brick arches. The piers have V-shaped cutwaters topped with pyramidal caps. Below the parapet, there is a thick projecting band made of blue brick. The flat coping consists of large bricks. The abutments have a battered design, with a concave profile beneath the deck, and they are splayed outward to support an embankment. The deck of the viaduct carries a single track.

Local climate

Aberdulais Viaduct (partly in Blaenrhonddan community) sits in one of the wettest parts of the UK, with an average of 1,380 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 96% of listed buildings.

It experiences an average of 28 freeze-thaw cycles a year, fewer than 69% of listed buildings. Of these, 12 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
  • Sale history — 1 transaction since 2015
  • 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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Nearby listed buildings

  1. Lock keeper's and toll collector's office at SW end of Aberdulais Aqueduct Grade II 30 m
  2. Aberdulais Lock on Tennant Canal Grade II 40 m
  3. Aberdulais Aqueduct (partly in Tonna community) Grade II* 42 m
  4. Aberdulais Viaduct (partly in Tonna community) Grade II 47 m
  5. Aberdulais Aqueduct (partly in Blaenhonddan community) Grade II* 76 m
  6. Railway bridge on NE side of Railway Tavern Grade II 108 m
  7. Aberdulais Basin at the head of the Tennant Canal Grade II 169 m
  8. Old Works Library at Aberdulais Falls Tinplate Works Grade II 193 m
  9. Remains of tramroad bridge at Aberdulais Falls Tinplate Works Grade II 213 m
  10. Pont Gam Grade II 222 m