Canal bridge at Top Lock on Monmouthshire and Brecon Canal is a Grade II listed building in the Torfaen local planning authority area, Wales. First listed on 30 September 2003. Bridge. 1 related planning application.

Canal bridge at Top Lock on Monmouthshire and Brecon Canal

WRENN ID
muted-beam-burdock
Grade
II
Local Planning Authority
Torfaen
Constituency
Torfaen MP: Nick Thomas-Symonds (Lab)
Country
Wales
Date first listed
30 September 2003
Type
Bridge
Address
Canal bridge at Top Lock on Monmouthshire and Brecon Canal, Cwmbran, Llantarnam, NP44 7AJ
OS grid reference
ST 291 935
Coordinates
51.63642, -3.02524
Source
Cadw listing

Also on this page: sale history · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The canal bridge at Top Lock on the Monmouthshire and Brecon Canal is a hump-backed structure built into the northern lock of the canal. It is made of rubblestone and features a single segmental arch constructed with dressed sandstone voussoirs. The bridge has parapets with flat coping that were repaired with cement in the 20th century. The abutments splay outwards on each side, leading to square piers, and the deck is made of cement.

Local climate

Canal bridge at Top Lock on 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
  • Sale history — 4 transactions since 2000
  • Related listed building consents — 1 application
  • 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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