Aber-clwyd lock and overflow on Neath Canal is a Grade II listed building in the Neath Port Talbot local planning authority area, Wales. First listed on 28 March 1990. Canal lock.

Aber-clwyd lock and overflow on Neath Canal

WRENN ID
silent-buttress-dawn
Grade
II
Local Planning Authority
Neath Port Talbot
Constituency
Neath and Swansea East MP: Carolyn Harris (Lab)
Country
Wales
Date first listed
28 March 1990
Type
Canal lock
Address
Aber-clwyd lock and overflow on Neath Canal, Glynneath
OS grid reference
SN 849 045
Coordinates
51.72782, -3.66703
Source
Cadw listing

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

Description

Aber-clwyd lock and overflow on the Neath Canal is a canal lock and overflow structure featuring a chamber with coursed stone walls and flat stone kerbs. It has new gates and machinery. On the south side of the canal, to the northeast of the chamber, the towpath crosses an overflow channel that is supported by three contiguous segmental arches made of stone voussoirs. There are low parapets with flat stone copings on each side. The overflow channel has sides and a floor made of squared stone.

Local climate

Aber-clwyd lock and overflow on Neath Canal sits in one of the wettest parts of the UK, with an average of 1,340 mm of rain a year. This makes it wetter than 96% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.

It experiences an average of 33 freeze-thaw cycles a year, fewer than 53% of listed buildings. Of these, 15 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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Nearby listed buildings

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  2. Milestone on B4242 near Oak Lodge Grade II 418 m
  3. Icehouse at Rheola House Grade II 798 m
  4. Stables and Coach House at Rheola House Grade II 865 m
  5. Rheola Brook Aqueduct Grade II 932 m
  6. Bridge over Neath Canal at Maes-gwyn Grade II 1.0 km
  7. Rheola overbridge on Neath Canal Grade II 1.1 km
  8. Limekiln to SE of Maes-Gwyn Lock on Neath Canal Grade II 1.1 km
  9. Rheola House Grade II* 1.2 km
  10. Bridge over Neath Canal near Crugau Grade II 1.6 km