Cefn Brynich Canal Bridge Aqueduct is a Grade II* listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 17 January 1963. Canal aqueduct.

Cefn Brynich Canal Bridge Aqueduct

WRENN ID
vacant-marble-dew
Grade
II*
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
17 January 1963
Type
Canal aqueduct
Address
Cefn Brynich Canal Bridge Aqueduct, Llanfrynach, Powys
OS grid reference
SO 079 272
Coordinates
51.93654, -3.3409
Source
Cadw listing

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

Description

Cefn Brynich Canal Bridge Aqueduct is a canal aqueduct constructed from rubble stone. It features four broad elliptical arches made with stone voussoirs, with some arches lined in black brick, likely from the late 19th or early 20th century. The structure has low piers made of squared stone with cutwaters, and there is a raised band at the level where the arches spring. The cutwaters continue upward and are chamfered off at the height of the arch crowns. Above these, flat piers extend up to just below the base of the parapet. There are raised piers on each side of the outer arches, and the ends of the bridge curve outward. The parapet is present only on the west side.

Local climate

Cefn Brynich Canal Bridge Aqueduct sits in one of the wettest parts of the UK, with an average of 1,180 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 78% of listed buildings.

It experiences an average of 57 freeze-thaw cycles a year, more than 96% of listed buildings. Of these, 32 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. Canal Bridge No 162 Brecon & Abergavenny Canal Grade II 150 m
  2. Lock Road Bridge Grade II* 177 m
  3. Canal Bridge No 163 and Cefn Brynich Lock Chamber Grade II 194 m
  4. Lock Cottage Grade II 203 m
  5. Lock House Grade II 211 m
  6. Barn range at Cefn Brynich Grade II 291 m
  7. Canal Bridge No 161 Brecon & Abergavenny Canal Grade II 489 m
  8. Cartshed at Abercynrig Grade II 942 m
  9. Stable at Abercynrig Grade II 948 m
  10. Tunnel carrying Brynich stream under Brecon & Abergavenny Canal (partly in Brecon community) Grade II 986 m