Bridge over drainage ditch at entrance to Tan-y-Marian is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 26 September 2005. Bridge.
Bridge over drainage ditch at entrance to Tan-y-Marian
- WRENN ID
- stony-cupola-hawk
- 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
- Bridge over drainage ditch at entrance to Tan-y-Marian, Tremadog, Porthmadog
- OS grid reference
- SH 565 403
- Coordinates
- 52.94089, -4.13582
- Source
- Cadw listing
Description
This is a single-carriageway, single-span bridge located at the entrance to Tan-y-Marian. It is constructed from blocks of rubble stone laid in regular courses. The bridge features a segmental arch made with voussoirs and has a simple drip mould. The parapet on the northern side has been lowered and includes a cement coping. On the southeast side, the parapet is splayed to a terminal square pier. On the southwest side, the parapet meets an iron gate flanked by square stone piers. The bridge has not been inspected.
Local climate
Bridge over drainage ditch at entrance to Tan-y-Marian 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.
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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