Pont Gynon and Boundary Stone is a Grade II listed building in the Pembrokeshire Coast National Park local planning authority area, Wales. First listed on 10 December 1997. Bridge.
Pont Gynon and Boundary Stone
- WRENN ID
- odd-tower-barley
- Grade
- II
- Local Planning Authority
- Pembrokeshire Coast National Park
- Constituency
- Ceredigion Preseli MP: Ben Lake (PC)
- Country
- Wales
- Date first listed
- 10 December 1997
- Type
- Bridge
- Address
- Pont Gynon and Boundary Stone, Pontgynon, Crymych, Eglwyswrw
- OS grid reference
- SN 126 369
- Coordinates
- 51.9996, -4.73085
- Source
- Cadw listing
Description
Pont Gynon is a 19th-century single arch humped bridge made of rubble stone, spanning the river with a long, winding causeway approach from the north. The main arch features cut Cilgerran stone voussoirs and an arch ring. The bridge has rubble parapets topped with edge-on stone coping. The eastern parapet includes a 19th-century boundary stone marked "Eglwyswrw Boundary Meline Boundary," similar to those found at other nearby bridges such as Pont Brynberian, Pontyglasier, and Pontrhiwfelen, as well as locations north of Cross Inn and east of Trewilym. The northern abutment extends approximately 71 meters across the flood meadow, turning northwest and then northeast, and includes two low flood-water arches with Cilgerran stone voussoirs and keystones. The southern abutment runs for about 12 meters.
Local climate
Pont Gynon and Boundary Stone sits in one of the wettest parts of the UK, with an average of 1,170 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.
It experiences an average of 13 freeze-thaw cycles a year, fewer than 88% of listed buildings. Of these, 6 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
- Sale history — 1 transaction since 2007
- 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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