Trothy Bridge is a Grade II listed building in the Monmouthshire local planning authority area, Wales. First listed on 10 August 2005. Bridge.

Trothy Bridge

WRENN ID
narrow-panel-falcon
Grade
II
Local Planning Authority
Monmouthshire
Constituency
Monmouthshire MP: Catherine Fookes (Lab)
Country
Wales
Date first listed
10 August 2005
Type
Bridge
Address
Trothy Bridge, Troy, Monmouth
OS grid reference
SO 507 116
Coordinates
51.80122, -2.71615
Source
Cadw listing

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

Description

Trothy Bridge is a Grade II listed structure built from roughly squared and coursed sandstone, featuring dressed stone for the arches, copings, pilasters, and cutwater. It is a two-arch bridge with low semi-circular arches on either side of a diamond cutwater, which is visible from both sides of the bridge. There is a central strip pilaster over the cutwater, as well as end pilasters, and the parapet is topped with triangular coping stones. The downstream face of the bridge has been more extensively rebuilt in the late 20th century compared to the upstream side, and the parapet wall includes some concrete coping stones.

Local climate

Trothy Bridge receives an average of 820 mm of rain a year. This makes it wetter than 52% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 57% of listed buildings.

It experiences an average of 42 freeze-thaw cycles a year, more than 80% of listed buildings. Of these, 19 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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