St Anne's Tunnel West Portal (MLN111648) is a Grade II* listed building in the Bristol, City of local planning authority area, England. First listed on 4 March 1977. Tunnel portal.
St Anne's Tunnel West Portal (MLN111648)
- WRENN ID
- shifting-chancel-moss
- Grade
- II*
- Local Planning Authority
- Bristol, City of
- Constituency
- Bristol East MP: Kerry McCarthy (Lab)
- Country
- England
- Date first listed
- 4 March 1977
- Type
- Tunnel portal
- Address
- St Anne's Tunnel West Portal (MLN111648), West of Birchwood Road
- OS grid reference
- ST 624 720
- Coordinates
- 51.44616, -2.54243
- Source
- Historic England listing
Description
St Anne's Tunnel West Portal is a Grade II* listed structure made of Pennant stone throughout. The stone is squared and coursed at the tunnel portal, side tower faces, soffit, and irregular supporting buttress, with ashlar used for all dressings, voussoirs, copings, crenulations, machicolations, and quoins.
The design features an asymmetric composition with a round arch spanning 30 feet (9 meters). This arch is made up of plain double voussoirs, set back and chamfered, and it terminates at the base with large chamfer stops. Below the arch, there are plain spandrels beneath double-step corbelled false machicolations, which are supported by pointed gothic arches. These arches lead up to an embattled parapet with profiled copings that slope down towards the track.
To the north (Down), there is a square, battered tower with crenellations that match the parapet. On the south (Up) side, the portal face is adjacent to the rockface, and free-form rubble buttresses are attached to support the tumble-home bedrock.
Local climate
St Anne's Tunnel West Portal (MLN111648) receives an average of 860 mm of rain a year. This makes it wetter than 61% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 66% of listed buildings.
It experiences an average of 34 freeze-thaw cycles a year, more than 52% 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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- 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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