Tofs Lock Bridge (Canal Bridge No 135) is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 28 August 1998. Bridge.

Tofs Lock Bridge (Canal Bridge No 135)

WRENN ID
crumbling-lantern-gold
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
28 August 1998
Type
Bridge
Address
Tofs Lock Bridge (Canal Bridge No 135), Cwm Crawnon, Llangynidr, Powys
OS grid reference
SO 137 198
Coordinates
51.87047, -3.25465
Source
Cadw listing

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

Description

Tofs Lock Bridge, also known as Canal Bridge No 135, is a hump-backed bridge made of rubble sandstone. It features a round arch with a keystone on the west side, which has been replaced on the east side. The abutments curve outwards on both sides, and the low parapet includes square end piers.

Local climate

Tofs Lock Bridge (Canal Bridge No 135) 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

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  5. Lock No 66 Grade II 315 m
  6. Dan-y-graig Bridge (Canal Bridge No.137) Grade II 593 m
  7. Coombes Lock Bridge (Canal Bridge No 134) Grade II 639 m
  8. Limekiln at Monmouthshire and Brecon Canal Sanitary Station Grade II 665 m
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