Castle Bridge (Canal Bridge No. 152) is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 17 December 1998. Bridge.

Castle Bridge (Canal Bridge No. 152)

WRENN ID
dark-doorway-indigo
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 December 1998
Type
Bridge
Address
Castle Bridge (Canal Bridge No. 152), Pencelli, Talybont-On-Usk, Powys
OS grid reference
SO 095 248
Coordinates
51.91479, -3.3159
Source
Cadw listing

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

Description

Castle Bridge, also known as Canal Bridge No. 152, is a hump-back bridge constructed from rubble sandstone. It features a segmental arch made up of thin voussoirs and has a low parapet with flat coping. The abutments curve outwards on both sides, and the parapet is finished with square end piers. On the eastern side, there is a cast iron plaque displaying the bridge number in relief at the keystone position. The towpath runs beneath the bridge on the northern side, where it includes a stone kerb, while on the southern side, there is a stringcourse that is roughly at water level. The deck of the bridge is a grass track, and there is one lozenge-shaped cast iron weight restriction sign along with one post. A large former quarry is located adjacent to the bridge.

Local climate

Castle Bridge (Canal Bridge No. 152) 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.

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Nearby listed buildings

  1. Barn range at Castle Farm Grade II 105 m
  2. Granary at Castle Farm Grade II 139 m
  3. Castle Farm farmhouse Grade II* 144 m
  4. Courtyard range immediately SW of Castle Farmhouse Grade II 152 m
  5. The Royal Oak Grade II 307 m
  6. Canal store at Pencelli Grade II 335 m
  7. Pencelli Bridge (Canal Bridge No.154) Grade II 390 m
  8. Pencelli Court (also known as Penkelly Court) including attached byre Grade II 502 m
  9. Byre at Pencelli Court. Grade II 509 m
  10. Granary and attached shed at Pencelli Court Grade II 517 m