Barrack Hill Canal Tunnel Portal is a Grade II listed building in the Newport local planning authority area, Wales. First listed on 28 August 2001. Canal tunnel portal.

Barrack Hill Canal Tunnel Portal

WRENN ID
heavy-eave-dawn
Grade
II
Local Planning Authority
Newport
Constituency
Newport East MP: Jessica Morden (Lab)
Country
Wales
Date first listed
28 August 2001
Type
Canal tunnel portal
Address
Barrack Hill Canal Tunnel Portal, Crindau, Shaftesbury
OS grid reference
ST 308 891
Coordinates
51.59698, -3.00015
Source
Cadw listing

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

Description

The Barrack Hill Canal Tunnel Portal is a canal tunnel entrance made of random rubble with a tooled flat coping. The parapet is angled to match the slope of the hill. It features a round arch entrance with part-tooled voussoirs and a keystone. The towpath is located on the east side, and the approach bank is reinforced with stone. Currently, the arch has a wire mesh blocking it, along with a sluice and grille in front, and there is a broken electrical installation at the side.

Local climate

Barrack Hill Canal Tunnel Portal receives an average of 930 mm of rain a year. This makes it wetter than 71% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 72% of listed buildings.

It experiences an average of 35 freeze-thaw cycles a year, more than 55% of listed buildings. Of these, 14 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
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  • 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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