Hall's Bridge, Railway Viaduct over River Ebbw and Western Valleys Railway Line is a Grade II listed building in the Caerphilly local planning authority area, Wales. First listed on 17 December 1998. Bridge.

Hall's Bridge, Railway Viaduct over River Ebbw and Western Valleys Railway Line

WRENN ID
guardian-screen-sage
Grade
II
Local Planning Authority
Caerphilly
Constituency
Newport West and Islwyn MP: Ruth Jones (Lab)
Country
Wales
Date first listed
17 December 1998
Type
Bridge
Address
Hall's Bridge, Railway Viaduct over River Ebbw and Western Valleys Railway Line, Cwmcarn, Crosskeys
OS grid reference
ST 217 929
Coordinates
51.63004, -3.13125
Source
Cadw listing

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

Description

Hall's Bridge is a railway viaduct that spans the River Ebbw and the Western Valleys Railway Line. It features a plate girder design supported by eight high, wide, and narrow piers made of snecked rockfaced stone. These piers extend from a deep railway cutting on the west to the continuation of the line at canal level on the east side of the by-pass. The eastern pier is a replacement, likely due to road construction. The stonework includes dressed arises, and many stones are drilled and fixed to a core. The single track deck is constructed of riveted metal plates and is supported by cross-braced structures beneath. The bridge has an open parapet made of L-shaped uprights and three rows of tubular bars, with the eastern bay having been altered.

Local climate

Hall's Bridge, Railway Viaduct over River Ebbw and Western Valleys Railway Line sits in a wetter-than-average part of the UK, with an average of 1,000 mm of rain a year. This makes it wetter than 80% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 77% of listed buildings.

It experiences an average of 33 freeze-thaw cycles a year, fewer than 56% of listed buildings. Of these, 13 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.

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