Aqueduct over the Afon Lwyd, Monmouthshire and Brecon Canal, including weir to south is a Grade II listed building in the Torfaen local planning authority area, Wales. First listed on 28 August 1997. Aqueduct.

Aqueduct over the Afon Lwyd, Monmouthshire and Brecon Canal, including weir to south

WRENN ID
still-niche-sage
Grade
II
Local Planning Authority
Torfaen
Constituency
Torfaen MP: Nick Thomas-Symonds (Lab)
Country
Wales
Date first listed
28 August 1997
Type
Aqueduct
Address
Aqueduct over the Afon Lwyd, Monmouthshire and Brecon Canal, including weir to south, Pontymoile, Pontypool
OS grid reference
SO 293 002
Coordinates
51.69682, -3.02335
Source
Cadw listing

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

Description

The aqueduct over the Afon Lwyd, part of the Monmouthshire and Brecon Canal, features a weir to the south. It is constructed from squared coursed stone, with dressed voussoirs and pilaster bands. This tall single arch aqueduct has a solid appearance, characterized by a semi-circular arch framed by narrow pilaster strips and a decorative band at the crown. It includes deep curved wing walls, and a parapet that rests on another band. The structure is visually appealing, displaying the same architectural treatment on both sides, although the downstream face is enhanced by the interesting masonry weir located below. This aqueduct also crosses into the New Inn Community Area.

Local climate

Aqueduct over the Afon Lwyd, Monmouthshire and Brecon Canal, including weir to south receives an average of 940 mm of rain a year. This makes it wetter than 73% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 72% of listed buildings.

It experiences an average of 41 freeze-thaw cycles a year, more than 79% of listed buildings. Of these, 19 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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