Railway Bridge Over Southdown Road is a Grade II listed building in the St Albans local planning authority area, England. Railway bridge.

Railway Bridge Over Southdown Road

WRENN ID
western-finial-pigeon
Grade
II
Local Planning Authority
St Albans
Constituency
Harpenden and Berkhamsted MP: Victoria Collins (LD)
Country
England
Type
Railway bridge
Address
Railway Bridge Over Southdown Road, Harpenden Town
OS grid reference
TL 141 134
Coordinates
51.80799, -0.34641
Source
Historic England listing

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

Description

The railway bridge over Southdown Road, built around 1865 by Liddell and Barlow, is a Grade II listed structure. It was extended on the west side around 1880 when the London-Midland track was made quadruple. The bridge features Cambridge blue brick, with stone dressings on the east side and dark red stock brick on the west side. It has a semicircular tunnel arch that crosses the road at a steep angle, giving it a parabolic appearance. The elevations include one and two broad plain piers on either side of the arch and a deep parapet. The east side showcases a stone roll moulding around the arch and T-shaped stone modillions in the stepped brick band below the parapet. The blue and stock bricks on the east side are mixed, and the parapet piers have brick modillions. The tunnel arch consists of 18 square sections arranged diagonally in a criss-cross, stepped formation, with the nine sections on the east side featuring smooth stone imposts. A continuous plain plinth, capped in stone, is present on the eastern half. The northeast and southwest embankments have sloping abutments made of blue brick, each with deep rectangular buttresses connected by deep arched recesses that end in niches. The long sloping elevations are finished with short brick piers.

Local climate

Railway Bridge Over Southdown Road sits in a drier-than-average part of the UK, with an average of 720 mm of rain a year. This makes it drier than 82% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 79% of listed buildings.

It experiences an average of 32 freeze-thaw cycles a year, fewer than 57% of listed buildings. Of these, 15 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
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