Bridge 106 over the Brecknock & Abergavenny Canal including Iron Sign is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 27 July 2000. Infrastructure.

Bridge 106 over the Brecknock & Abergavenny Canal including Iron Sign

WRENN ID
floating-bonework-oak
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Monmouthshire MP: Catherine Fookes (Lab)
Country
Wales
Date first listed
27 July 2000
Type
Infrastructure
Address
Bridge 106 over the Brecknock & Abergavenny Canal including Iron Sign, Gilwern, Llanelly, Monmouthshire
OS grid reference
SO 237 151
Coordinates
51.83014, -3.10848
Source
Cadw listing

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

Description

Bridge 106 over the Brecknock & Abergavenny Canal is constructed from rubble sandstone and features a semi-elliptical arch made of stone voussoirs, with a projecting keystone. The bridge has a humped parapet that flares out to square piers, topped with slab copings. To the north-west, there is a long retaining wall for the footpath, which includes a vertical stone-slab stile.

At the southwest corner of the bridge stands a tall iron sign in a lozenge shape, erected by the Great Western Railway Company to limit heavy loads. The sign states, "Motor Car Act 1886 and 1903. Notice this bridge is insufficient to carry a heavy motor car the registered axle weight of any axle which exceeds (blank) tons or the registered axle weight of the several axles of which exceed in the aggregate (blank) tons or a heavy motor car drawing a trailer if the registered axle weight of the several axles of the heavy motor car and the axle weights of the several axles of the trailer exceed in the aggregate (blank). Great Western Railway Ltd. Paddington Station. London."

Local climate

Bridge 106 over the Brecknock & Abergavenny Canal including Iron Sign 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
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  4. Bridge 107 over the Brecknock & Abergavenny Canal including Iron Sign Grade II 555 m
  5. Parish Church of St. Elli Grade II* 598 m
  6. Preaching Cross at Parish Church of St. Elli Grade II 605 m
  7. Pair of Memorials to Williams and Jenkins Families W of Churchyard at Llanelly Church Grade II 608 m
  8. Group of Six Memorials in centre of old Churchyard at Llanelly Church Grade II 609 m
  9. Williams Memorial in SW corner of old Churchyard at Llanelly Church Grade II 615 m
  10. Railed Memorial to Protheroe family near W Gate of old Churchyard at Llanelly Church Grade II 620 m