Pont Nant Mostyn is a Grade II listed building in the Conwy local planning authority area, Wales. First listed on 21 July 1999. Bridge.
Pont Nant Mostyn
- WRENN ID
- last-lancet-wren
- Grade
- II
- Local Planning Authority
- Conwy
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 21 July 1999
- Type
- Bridge
- Address
- Pont Nant Mostyn, Bryn Rhydyrarian, Llansannan
- OS grid reference
- SH 955 676
- Coordinates
- 53.19573, -3.56488
- Source
- Cadw listing
Description
Pont Nant Mostyn is a road bridge constructed from local rubble masonry. It features a single wide segmental arch span over the river, with the stonework of the arch set slightly back from the main wall of the bridge. The bridge includes a drip course and projecting springing course stones. The parapet walls rise to about 1 meter above the road level, with slab coping on the west side and roughly embattled coping on the east side.
Local climate
Pont Nant Mostyn sits in a wetter-than-average part of the UK, with an average of 1,010 mm of rain a year. This makes it wetter than 81% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 59% of listed buildings.
It experiences an average of 30 freeze-thaw cycles a year, fewer than 66% of listed buildings. Of these, 16 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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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- 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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