Pont Factory is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 21 July 2000. Bridge.
Pont Factory
- WRENN ID
- ruined-hammer-rye
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 21 July 2000
- Type
- Bridge
- Address
- Pont Factory, Llanllyfni
- OS grid reference
- SH 471 524
- Coordinates
- 53.04773, -4.28198
- Source
- Cadw listing
Description
Pont Factory is a bridge constructed from roughly coursed rubblestone, featuring saddleback coping on long abutments that create a raised causeway to the north and south. The bridge itself is made of regularly coursed blocks and includes piers, a coped parapet, and a string course above a single-span segmental arch that spans the river. The arch is faced with rough-dressed voussoirs and has a keystone beneath a plain arch ring.
Local climate
Pont Factory sits in one of the wettest parts of the UK, with an average of 1,610 mm of rain a year. This makes it wetter than 99% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 99% of listed buildings.
It experiences an average of 11 freeze-thaw cycles a year, fewer than 89% of listed buildings. Of these, 4 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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