Bridge 123 over the Montgomeryshire Canal is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 29 February 1996. Bridge.
Bridge 123 over the Montgomeryshire Canal
- WRENN ID
- unlit-pilaster-alder
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
- Country
- Wales
- Date first listed
- 29 February 1996
- Type
- Bridge
- Address
- Bridge 123 over the Montgomeryshire Canal, Belan, Welshpool
- OS grid reference
- SJ 206 037
- Coordinates
- 52.62566, -3.17317
- Source
- Cadw listing
Description
Bridge 123 over the Montgomeryshire Canal is a Grade II listed structure. The Montgomeryshire Canal was constructed between 1794 and 1797, designed by engineers John and Thomas Dadford, reaching as far as Garthmyl, south of Welshpool. In the 1880s and 1890s, the Shropshire Union Railways and Canal Company undertook significant renovations on the canal, likely resulting in the rebuilding of this bridge as a replica of the original design.
The bridge is made of blue brick and features stone copings on the parapet. It has a single arched span with slightly curving abutments that end in simple piers. The arch is formed by voussoirs and includes an advanced brick 'keystone', while a plain string course marks the base of the parapet. This bridge is noted as a good example of a typical Montgomeryshire Canal Bridge from the late 19th century engineering phase.
Local climate
Bridge 123 over the Montgomeryshire Canal receives an average of 900 mm of rain a year. This makes it wetter than 67% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 58% of listed buildings.
It experiences an average of 42 freeze-thaw cycles a year, more than 81% of listed buildings. Of these, 23 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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- Detailed attributes — period, style, materials, features
- Flood risk assessment
- 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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