West Portal of Gannow Tunnel is a Grade II listed building in the Burnley local planning authority area, England. Tunnel portal.
West Portal of Gannow Tunnel
- WRENN ID
- forgotten-pilaster-magpie
- Grade
- II
- Local Planning Authority
- Burnley
- Constituency
- Burnley MP: Oliver Ryan (Lab)
- Country
- England
- Type
- Tunnel portal
- Address
- West Portal of Gannow Tunnel, Cog Lane
- OS grid reference
- SD 824 325
- Coordinates
- 53.78908, -2.268
- Source
- Historic England listing
Description
The west portal of Gannow Tunnel, part of the Leeds-Liverpool Canal, was constructed between 1797 and 1801 under the engineering of Samuel Fletcher. It is built from coursed squared punch-dressed sandstone blocks. The portal features a semicircular arch adorned with rusticated voussoirs and channelled pilasters, which are decorated with a hieroglyphic "vermiculation" pattern in the spandrels between them. There is a plain band and a coped parapet above, with slightly concave full-height abutments. An oval number plate marked "128" is located on the right-hand abutment.
Local climate
West Portal of Gannow Tunnel sits in one of the wettest parts of the UK, with an average of 1,280 mm of rain a year. This makes it wetter than 94% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 88% of listed buildings.
It experiences an average of 56 freeze-thaw cycles a year, more than 96% of listed buildings. Of these, 32 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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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- 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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- Leeds and Liverpool Canal Boundary Marker Above Gannow Tunnel at Sd 8262 3277
- East Portal of Gannow Tunnel
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