Llwyncelyn Bridge (Canal Bridge No 121) is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 21 October 1998. Bridge.

Llwyncelyn Bridge (Canal Bridge No 121)

WRENN ID
fallow-bronze-martin
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
21 October 1998
Type
Bridge
Address
Llwyncelyn Bridge (Canal Bridge No 121), Hendreforwydd, Llangattock, Powys
OS grid reference
SO 193 191
Coordinates
51.86489, -3.17322
Source
Cadw listing

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

Description

Llwyncelyn Bridge, also known as Canal Bridge No 121, is a single-span hump-backed bridge made of rubble sandstone. It features an asymmetrical segmental arch with thin voussoirs and keystones. The bridge has continuous parapets that are splayed, with square end piers and copings primarily made of upright stones. There is a stone stile located immediately to the northeast of the bridge. The concrete deck slopes sharply upwards towards the south, and the internal sides of the parapets have been repointed.

Local climate

Llwyncelyn Bridge (Canal Bridge No 121) sits in a wetter-than-average part of the UK, with an average of 1,100 mm of rain a year. This makes it wetter than 87% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 74% of listed buildings.

It experiences an average of 54 freeze-thaw cycles a year, more than 94% 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.

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Nearby listed buildings

  1. West Lodge Grade II 133 m
  2. Weigh Bridge House including weigh bridge Grade II 267 m
  3. Baylis Bridge (Canal Bridge No 120) Grade II 277 m
  4. Hay Barn to W side of farmyard Grade II 361 m
  5. Home Farm Grade II 362 m
  6. Garden Boundary Wall including gated entrance Grade II 392 m
  7. Garden Terrace Wall to N of the site of the house Grade II 404 m
  8. The Stable Court Grade II* 406 m
  9. Cow-house and stable at Hendreforwydd Grade II 446 m
  10. Barn at Hendreforwydd Grade II 457 m