Three-Arch Aqueduct over Vyrnwy Flood Plain (Southern Arches) New Bridge Vyrnwy is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 5 April 1993. Aqueduct.

Three-Arch Aqueduct over Vyrnwy Flood Plain (Southern Arches) New Bridge Vyrnwy

WRENN ID
little-fireplace-starling
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
5 April 1993
Type
Aqueduct
Address
Three-Arch Aqueduct over Vyrnwy Flood Plain (Southern Arches) New Bridge Vyrnwy, Carreghofa
OS grid reference
SJ 253 197
Coordinates
52.77015, -3.10737
Source
Cadw listing

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

Description

The Three-Arch Aqueduct over the Vyrnwy Flood Plain, known as the Southern Arches, is a 19th-century structure featuring a central core of red brick with blue brick facings and a brick band above the arches. It has three elliptical arches supported by central raking buttresses and sweeping abutments topped with stone pyramidal caps. Above each arch, there are pairs of floreated terminals for tie-rods.

Local climate

Three-Arch Aqueduct over Vyrnwy Flood Plain (Southern Arches) New Bridge Vyrnwy receives an average of 850 mm of rain a year. This makes it wetter than 58% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 66% of listed buildings.

It experiences an average of 41 freeze-thaw cycles a year, more than 78% of listed buildings. Of these, 22 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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