Aberdulais Aqueduct (partly in Tonna community) is a Grade II* listed building in the Neath Port Talbot local planning authority area, Wales. First listed on 29 January 1980. Aqueduct. 1 related planning application.

Aberdulais Aqueduct (partly in Tonna community)

WRENN ID
south-turret-ebony
Grade
II*
Local Planning Authority
Neath Port Talbot
Constituency
Neath and Swansea East MP: Carolyn Harris (Lab)
Country
Wales
Date first listed
29 January 1980
Type
Aqueduct
Address
Aberdulais Aqueduct (partly in Tonna community), Blaenhonddan, SA10 8EU
OS grid reference
SS 772 992
Coordinates
51.67885, -3.77652
Source
Cadw listing

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

Description

The Aberdulais Aqueduct is a canal aqueduct featuring ten bays, constructed from coursed rubble stone with dressed stone segmental arch rings. The arches vary in span, being wider in the center. On the upstream side, there are V-shaped cutwaters topped with pyramidal caps. Towpaths run along both sides of the aqueduct. The coping consists of both stone and brick. At the western bank, the aqueduct leads into a lock, while at the eastern end, it has a cast iron trough with stone coping, which crosses over a former navigable channel before entering the Aberdulais Basin on the eastern bank.

Local climate

Aberdulais Aqueduct (partly in Tonna 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 — 3 transactions since 2017
  • Related listed building consents — 1 application
  • 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. Aberdulais Lock on Tennant Canal Grade II 14 m
  2. Lock keeper's and toll collector's office at SW end of Aberdulais Aqueduct Grade II 20 m
  3. Aberdulais Viaduct (partly in Blaenrhonddan community) Grade II 42 m
  4. Aberdulais Viaduct (partly in Tonna community) Grade II 48 m
  5. Aberdulais Aqueduct (partly in Blaenhonddan community) Grade II* 50 m
  6. Railway bridge on NE side of Railway Tavern Grade II 98 m
  7. Aberdulais Basin at the head of the Tennant Canal Grade II 142 m
  8. Old Works Library at Aberdulais Falls Tinplate Works Grade II 153 m
  9. Remains of tramroad bridge at Aberdulais Falls Tinplate Works Grade II 175 m
  10. Former Stables at Aberdulais Falls Tinplate Works Grade II 186 m