Blaen y Cwm Viaduct is a Grade II listed building in the Blaenau Gwent local planning authority area, Wales. First listed on 25 May 1962. Church.

Blaen y Cwm Viaduct

WRENN ID
crooked-lantern-shade
Grade
II
Local Planning Authority
Blaenau Gwent
Constituency
Blaenau Gwent and Rhymney MP: Nick Smith (Lab)
Country
Wales
Date first listed
25 May 1962
Type
Church
Address
Blaen y Cwm Viaduct, Nant-Y-Bwch, Tredegar
OS grid reference
SO 132 109
Coordinates
51.79024, -3.25862
Source
Cadw listing

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

Description

Blaen y Cwm Viaduct is an impressive structure made of rock-faced limestone, spanning a broad valley. It features nine round-headed arches made of brick. The viaduct has rock-faced copings, although the brick parapets have been removed.

Local climate

Blaen y Cwm Viaduct sits in one of the wettest parts of the UK, with an average of 1,200 mm of rain a year. This makes it wetter than 91% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 80% of listed buildings.

It experiences an average of 54 freeze-thaw cycles a year, more than 95% of listed buildings. Of these, 30 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
Create free account

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.

See all similar buildings →

this building   1 similar   nearby listed buildings

Nearby listed buildings

  1. Agricultural Range at Milgatw Grade II 736 m
  2. Milgatw Grade II* 739 m
  3. Sirhowy Ironworks Grade II* 1.3 km
  4. Former Tramroad Bridge over Sirhowy River Grade II 1.4 km
  5. Ironworks Boundary Stone Grade II 1.6 km
  6. W boundary walls, gates and railings at St George’s church Grade II 1.7 km
  7. Christina Louise Nursing Home (aka Central Surgery) Grade II 1.7 km
  8. St George’s Church Grade II 1.7 km
  9. Harcourt Terrace Wesleyan Methodist Chapel, including schoolroom and front railings Grade II 2.2 km
  10. The Town Clock Grade II* 2.3 km