Pont Llanymynech is a Grade II* listed building in the Powys local planning authority area, Wales. First listed on 5 April 1993. Bridge.

Pont Llanymynech

WRENN ID
fossil-joist-martin
Grade
II*
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
5 April 1993
Type
Bridge
Address
Pont Llanymynech, Llandysilio
OS grid reference
SJ 268 204
Coordinates
52.77663, -3.08622
Source
Cadw listing

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

Description

Pont Llanymynech is a Grade II* listed bridge made of freestone, featuring three elliptical arches that each span 65 feet and include keystones. The bridge has sweeping abutments to the north and rounded cutwaters with rusticated niches above them. Below the coffered parapet, there is a modillion string-course. This bridge is noted for its unusually fine classical design in ashlar masonry.

Local climate

Pont Llanymynech 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.

More on this building

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  • Detailed attributes — period, style, materials, features
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  • 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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