Road bridge over Y Cyt beyond NE end of Chapel Street is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 26 September 2005. Bridge.

Road bridge over Y Cyt beyond NE end of Chapel Street

WRENN ID
lesser-steel-swallow
Grade
II
Local Planning Authority
Gwynedd
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
26 September 2005
Type
Bridge
Address
Road bridge over Y Cyt beyond NE end of Chapel Street, Porthmadog
OS grid reference
SH 569 390
Coordinates
52.92938, -4.12973
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

This is a single-span road bridge located over Y Cyt at the northeast end of Chapel Street. It features a wide single-carriageway design with abutments made of coursed Gest stone and a segmental arch constructed with voussoirs. On the northwest side, the abutments have slots for stop planks, while the southeast side has longer abutments that include moulded rebates. The bridge is topped with a coped parapet, which has a short return wall on the left (north) side and has partially collapsed at the right (south) end. Simple square terminal piers are present on the downstream side.

Local climate

Road bridge over Y Cyt beyond NE end of Chapel Street sits in one of the wettest parts of the UK, with an average of 1,490 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 97% of listed buildings.

It experiences an average of 32 freeze-thaw cycles a year, fewer than 60% of listed buildings. Of these, 15 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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