Pont-Rhythallt is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 27 August 1999. Bridge. 1 related planning application.

Pont-Rhythallt

WRENN ID
nether-dormer-russet
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
27 August 1999
Type
Bridge
Address
Pont-Rhythallt, Llanrug, LL55 3BE
OS grid reference
SH 544 637
Coordinates
53.15108, -4.17772
Source
Cadw listing

Also on this page: sale history · EPC · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The bridge at Pont-Rhythallt dates to an unknown period. It is constructed of regularly coursed and dressed snecked rubblestone, with more irregularly coursed stonework forming coped parapets above a string course. The structure comprises three semi-circular arches built with red brick voussoirs, spanning the river. Immediately adjacent is an arch over the former standard gauge railway, followed by a causeway leading northeast to a further arch over the former narrow gauge railway. Abutments are located at each end of the bridge.

Local climate

Pont-Rhythallt sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 93% of listed buildings.

It experiences an average of 23 freeze-thaw cycles a year, fewer than 75% of listed buildings. Of these, 11 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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 4 transactions since 2001
  • Related listed building consents — 1 application
  • 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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