Rheola Brook Aqueduct is a Grade II listed building in the Neath Port Talbot local planning authority area, Wales. First listed on 28 March 1990. Aqueduct.

Rheola Brook Aqueduct

WRENN ID
eternal-step-vetch
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
Aqueduct
Address
Rheola Brook Aqueduct, Glynneath
OS grid reference
SN 842 039
Coordinates
51.7225, -3.67749
Source
Cadw listing

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

Description

The Rheola Brook Aqueduct is a Grade II listed cast-iron aqueduct constructed from large cast-iron components. It features two side pieces with decorative outer faces and six base pieces. The sides are adorned with eleven thin Roman Doric half-columns. The broad channel consists of joined single massive pieces.

The bridge is supported by rubble stone piers made of squared stones, each pier having triangular-section faces. To the north, the channel is flanked by parapets and includes a cobbled channel with two additional triangular-faced piers. To the south, the channel slopes down slightly and has parapets that are cut to allow access ramps leading down to the canal.

Local climate

Rheola Brook Aqueduct 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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