St Anne's Tunnel East Portal (MLN111641) is a Grade II* listed building in the Bristol, City of local planning authority area, England. First listed on 4 March 1977. Engineering structure.
St Anne's Tunnel East Portal (MLN111641)
- WRENN ID
- late-soffit-ebony
- Grade
- II*
- Local Planning Authority
- Bristol, City of
- Constituency
- Bristol East MP: Kerry McCarthy (Lab)
- Country
- England
- Date first listed
- 4 March 1977
- Type
- Engineering structure
- Address
- St Anne's Tunnel East Portal (MLN111641), Birchwood Road
- OS grid reference
- ST 625 719
- Coordinates
- 51.44556, -2.5407
- Source
- Historic England listing
Description
St Anne's Tunnel East Portal is a 19th-century structure made of Pennant stone. The stone is squared and coursed on the portal face, soffit, and attached retaining wall, with ashlar dressings including voussoirs, copings, crenulations, machicolations, quoins, and side tower faces. Some areas have been patched with engineering brick.
The portal features an asymmetric design with a round arch that spans 30 feet (9 meters). The arch is made of plain double voussoirs, set back and chamfered, with some repairs in engineering brick that mimic the original style. Below the arch, there are plain spandrels topped by a flat coping. On the north side, there is a square tower with two arrow-loops, topped with double-step corbelled machicolations that support a projecting embattled parapet with sloping copings. The south side of the portal meets a battered, rubble-faced retaining wall.
Additional detached sections of retaining wall and buttresses can be found against the face of the cutting towards Bath. The portal is located at the western end of a short stretch of railway that runs along a shelf between a steep hillside and the River Avon, which was diverted by Isambard Kingdom Brunel. At the opposite end of this stretch is the West Portal of Fox's Wood Tunnel, which is also listed as Grade II*.
Local climate
St Anne's Tunnel East Portal (MLN111641) 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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