The former Throstle Nest Bridge, now the Arnold Road Subway is a Grade II listed building in the Darlington local planning authority area, England. First listed on 10 January 2022. Bridge.

The former Throstle Nest Bridge, now the Arnold Road Subway

WRENN ID
scattered-flue-tallow
Grade
II
Local Planning Authority
Darlington
Constituency
Darlington MP: Lola McEvoy (Lab)
Country
England
Date first listed
10 January 2022
Type
Bridge
Address
The former Throstle Nest Bridge, now the Arnold Road Subway, Pedestrian Subway Beneath the B6279, DL1 2PH
OS grid reference
NZ 300 152
Coordinates
54.53209, -1.53657
Source
Historic England listing

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

Description

The former Throstle Nest Bridge, now known as the Arnold Road Subway, is a former railway accommodation underbridge designed by George Stephenson for the Stockton & Darlington Railway in 1824. It was widened in 1830 and again in the late 19th century. Since 2008, it has served as a pedestrian subway beneath the B6279 road.

The bridge is constructed from ashlar sandstone and cream-coloured machine-made brick. Both the north and south sides of the bridge are nearly identical, featuring plain ashlar spandrels and curving wing-walls topped with flat coping slabs. The arch is semi-circular and made up of four rings of brickwork, which form the barrel vault from the late 19th-century widening. The original bridge and the 1830 widening have stone ashlar barrel vaults that match the dimensions of the later extensions, and the butt-joints between the widenings are clearly visible.

Local climate

The former Throstle Nest Bridge, now the Arnold Road Subway receives an average of 770 mm of rain a year. This makes it drier than 65% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 89% of listed buildings.

It experiences an average of 42 freeze-thaw cycles a year, more than 80% of listed buildings. Of these, 23 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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