Limekiln at Monmouthshire and Brecon Canal Sanitary Station is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 28 August 1998. Industrial.

Limekiln at Monmouthshire and Brecon Canal Sanitary Station

WRENN ID
sombre-finial-owl
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
Industrial
Address
Limekiln at Monmouthshire and Brecon Canal Sanitary Station, Cwm Crawnon, Llangynidr, Powys
OS grid reference
SO 143 198
Coordinates
51.87076, -3.24496
Source
Cadw listing

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

Description

The Limekiln at the Monmouthshire and Brecon Canal Sanitary Station is a structure made of random-rubble stone with a low round-headed draw arch. The draw hole is filled with rubble stone behind the wall's face. The top of the wall features a modern stone coping. To the left, there is a later retaining wall. On top of this structure, there is a modern toilet block, and on the west side, a round concrete cap likely indicates the presence of a second kiln. It is noteworthy that the kiln(s) were charged at the level of the tow-path, which is unusual, as typically the draw arch is found at this level, as seen in Llangattock and Talybont on Usk.

Local climate

Limekiln at Monmouthshire and Brecon Canal Sanitary Station 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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  1. Coombes Lock Bridge (Canal Bridge No 134) Grade II 27 m
  2. Lock No 65 Grade II 61 m
  3. Embanked Aqueduct carrying Monmouthshire and Brecon Canal over Afon Crawnon Grade II 112 m
  4. Lower Lock Bridge (Canal Bridge No 132), including Lock No 64 Grade II 346 m
  5. Lock No 66 Grade II 350 m
  6. Lock No 67 Grade II 482 m
  7. Lock No 68 Grade II 539 m
  8. Tofs Lock Bridge (Canal Bridge No 135) Grade II 665 m
  9. Bank of Limekilns beside Monmouthshire and Brecon Canal east of Bridge No 131 Grade II 883 m
  10. Llangynidr Bridge (partly in Llanfihangel Cwmdu with Bwlch and Cathedine community) Grade I 915 m