Hengoed Viaduct is a Grade II* listed building in the Caerphilly local planning authority area, Wales. First listed on 31 July 1980. Viaduct.
Hengoed Viaduct
- WRENN ID
- dusted-ledge-hyssop
- Grade
- II*
- Local Planning Authority
- Caerphilly
- Constituency
- Caerphilly MP: Chris Evans (Lab)
- Country
- Wales
- Date first listed
- 31 July 1980
- Type
- Viaduct
- Address
- Hengoed Viaduct, Maesycwmmer
- OS grid reference
- ST 155 949
- Coordinates
- 51.64671, -3.22181
- Source
- Cadw listing
Description
Hengoed Viaduct is a high 16-arch viaduct that is slightly curved in plan. It is constructed of rock-faced, snecked Pennant sandstone. The viaduct features high round arches supported by imposts with large voussoirs, and the soffits are partly made of red brick. The piers are narrow and slightly splayed. There is a string course and shallow parapets with coping stones, some of which are upright. The ends of the viaduct have square piers, and there is a smaller skewed east arch flanked by these piers.
Local climate
Hengoed Viaduct sits in a wetter-than-average part of the UK, with an average of 1,060 mm of rain a year. This makes it wetter than 85% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 81% of listed buildings.
It experiences an average of 32 freeze-thaw cycles a year, fewer than 59% of listed buildings. Of these, 13 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
Sign in or create a free account to unlock:
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
Similar buildings
The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.
this building 1 similar nearby listed buildings