Seiont Mill Road bridge is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 3 May 2002. Bridge.
Seiont Mill Road bridge
- WRENN ID
- scattered-buttress-ivory
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 3 May 2002
- Type
- Bridge
- Address
- Seiont Mill Road bridge, Morfa Common, Caernarfon
- OS grid reference
- SH 483 616
- Coordinates
- 53.13013, -4.26809
- Source
- Cadw listing
Description
Seiont Mill Road bridge is a double-carriageway road bridge built with a ramp. It features four arches made of coursed rock-faced stone, a parapet, and segmental brick arches.
Local climate
Seiont Mill Road bridge sits in one of the wettest parts of the UK, with an average of 1,370 mm of rain a year. This makes it wetter than 97% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.
It experiences an average of 20 freeze-thaw cycles a year, fewer than 78% of listed buildings. Of these, 9 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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