Llanwenarth Bridge (Canal Bridge No 99) is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 15 March 1996. Bridge.

Llanwenarth Bridge (Canal Bridge No 99)

WRENN ID
outer-chapel-winter
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Monmouthshire MP: Catherine Fookes (Lab)
Country
Wales
Date first listed
15 March 1996
Type
Bridge
Address
Llanwenarth Bridge (Canal Bridge No 99), Govilon, Llanfoist Fawr, Monmouthshire
OS grid reference
SO 261 139
Coordinates
51.81935, -3.07278
Source
Cadw listing

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

Description

Llanwenarth Bridge, also known as Canal Bridge No 99, was completed in 1805 under the direction of Thomas Cartwright. The bridge features coursed rubble masonry abutments and a segmental arch, following the standard design from that period. There is a tow-path located to the north of the bridge.

Local climate

Llanwenarth Bridge (Canal Bridge No 99) sits in a wetter-than-average part of the UK, with an average of 1,040 mm of rain a year. This makes it wetter than 83% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 75% of listed buildings.

It experiences an average of 48 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 24 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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  • 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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Nearby listed buildings

  1. Embanked aqueduct over road to W of Parish Church (including attached flights of steps &road tunnel) Grade II 264 m
  2. Llanwenarth House Grade II* 276 m
  3. Dry Dock to W of embanked Aqueduct Grade II 349 m
  4. Canal Drain to W of embanked Aqueduct Grade II 353 m
  5. Embanked Aqueduct SW of Govilon ( including Wall & Gate-piers to W ) Grade II 355 m
  6. Govilon Bridge (Canal Bridge no 98) Grade II 482 m
  7. Govilon House Grade II 495 m
  8. Derwen Deg Grade II 507 m
  9. Chapel Cottages No 3 Grade II 516 m
  10. Chapel Cottages No 2 Grade II 519 m