Llwmus Bridge (Canal Bridge No 113) is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 21 October 1998. Bridge.

Llwmus Bridge (Canal Bridge No 113)

WRENN ID
waiting-column-bracken
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
Llwmus Bridge (Canal Bridge No 113), Llangattock Park, Llangattock, Powys
OS grid reference
SO 212 170
Coordinates
51.84603, -3.14485
Source
Cadw listing

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

Description

Llwmus Bridge, also known as Canal Bridge No 113, is a single-span flat-decked bridge made of rubble sandstone. It features a wide segmental arch supported by voussoirs and keystones. The bridge has continuous parapets that are straight with end piers, except on the northeast side where the parapet is splayed. To increase the height of the parapets, post and rail timber fencing has been added on the deck.

Local climate

Llwmus Bridge (Canal Bridge No 113) sits in a wetter-than-average part of the UK, with an average of 1,040 mm of rain a year. This makes it wetter than 83% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 75% of listed buildings.

It experiences an average of 48 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 24 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

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  • 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
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Nearby listed buildings

  1. Llangattock Park House Grade II 309 m
  2. Park Bridge (Canal Bridge No 112) Grade II 357 m
  3. Lower Yard Bridge (Canal Bridge No 114) Grade II 505 m
  4. Limekiln Grade II 523 m
  5. Bethesda Chapel Grade II 547 m
  6. Pen-y-Pentre (aka The Old Factory House) Grade II 573 m
  7. Upper Yard Bridge (Canal Bridge No 115) Grade II 618 m
  8. Bank of Limekilns Grade II* 668 m
  9. Glanonney Grade II 670 m
  10. Horse Shoe Inn Grade II 769 m