Road bridge below Claerwen dam (partly in Rhayader community) is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 14 November 2000. Bridge.

Road bridge below Claerwen dam (partly in Rhayader community)

WRENN ID
rough-threshold-stoat
Grade
II
Local Planning Authority
Powys
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
14 November 2000
Type
Bridge
Address
Road bridge below Claerwen dam (partly in Rhayader community), Elan Valley, Llanwrthwl
OS grid reference
SN 869 634
Coordinates
52.25723, -3.65785
Source
Cadw listing

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

Description

This is a single-carriageway road bridge located below the Claerwen dam, partly within the Rhayader community. It is constructed from reinforced concrete and faced with rock-faced stone. The bridge features a single segmental arch. The flat deck includes a parapet that has concrete intermediate and terminal piers, along with steel railings.

Local climate

Road bridge below Claerwen dam (partly in Rhayader community) sits in one of the wettest parts of the UK, with an average of 1,230 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 86% of listed buildings.

It experiences an average of 57 freeze-thaw cycles a year, more than 97% of listed buildings. Of these, 35 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. Gauge House at Claerwen Reservoir Grade II 105 m
  2. Claerwen dam, including attached footbridges (partly in Rhayader community) Grade II 219 m
  3. Claerwen Dam, including attached footbridges Grade II 232 m
  4. Llannerch-y-Cawr Grade II* 3.8 km
  5. Carreg Ddu Viaduct and Submerged Dam Grade II* 4.1 km
  6. Foel Valve Tower Grade II* 4.2 km
  7. Caban Coch Dam (partly in Llanwrthwl community) Grade II* 5.6 km
  8. Caban Coch dam (partly in Rhayader community) Grade II* 5.6 km
  9. Footbridge at hydro-electric station (partly in Llanwrthwl community) Grade II 5.7 km
  10. Hydro-electric Station below Caban Coch Dam (north power house) Grade II 5.7 km