Tunnel Entrance and Chamber 20 Metres East of Bridge is a Grade II listed building in the Northumberland local planning authority area, England. First listed on 23 August 1985. Tunnel.

Tunnel Entrance and Chamber 20 Metres East of Bridge

WRENN ID
rusted-parapet-briar
Grade
II
Local Planning Authority
Northumberland
Constituency
Hexham MP: Joe Morris (Lab)
Country
England
Date first listed
23 August 1985
Type
Tunnel
OS grid reference
NY 803 467
Coordinates
54.81543, -2.30702
Source
Historic England listing

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

Description

The tunnel entrance and chamber, located 20 metres east of the bridge in the parishes of Allendale and West Allen, is a portal for a drainage tunnel dating from the early 19th century. It is constructed of squared stone and features an elliptical-arched entrance with a flat coping. Inside, the entrance leads into an arched chamber approximately 2 metres square, which has two arched drainage adits extending from it.

Local climate

Tunnel Entrance and Chamber 20 Metres East of Bridge sits in a wetter-than-average part of the UK, with an average of 1,050 mm of rain a year. This makes it wetter than 84% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 68% of listed buildings.

It experiences an average of 76 freeze-thaw cycles a year, more than 99% of listed buildings. Of these, 54 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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