Cwrt-y-mwnws Lock, Monmouthshire and Brecon Canal is a Grade II listed building in the Newport local planning authority area, Wales. First listed on 14 September 1999. Canal lock.
Cwrt-y-mwnws Lock, Monmouthshire and Brecon Canal
- WRENN ID
- sombre-cinder-dew
- Grade
- II
- Local Planning Authority
- Newport
- Constituency
- Newport West and Islwyn MP: Ruth Jones (Lab)
- Country
- Wales
- Date first listed
- 14 September 1999
- Type
- Canal lock
- Address
- Cwrt-y-mwnws Lock, Monmouthshire and Brecon Canal, Allt-Yr-Yn
- OS grid reference
- ST 289 886
- Coordinates
- 51.59192, -3.02722
- Source
- Cadw listing
Description
Cwrt-y-mwnws Lock is a rectangular lock chamber constructed from squared sandstone rubble, featuring tooled sandstone copings. There is a rebate for a removed lock gate on the east side, with splayed retaining cheek walls extending beyond it. At the west end, there is a rubble weir accompanied by splayed retaining walls. A 20th-century timber bridge spans the lock chamber, and there is a brick-lined overflow culvert located to the south.
Local climate
Cwrt-y-mwnws Lock, Monmouthshire and Brecon Canal receives an average of 930 mm of rain a year. This makes it wetter than 71% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 72% of listed buildings.
It experiences an average of 35 freeze-thaw cycles a year, more than 55% of listed buildings. Of these, 14 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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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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