St Pinnock Viaduct is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 30 April 1985. Railway viaduct.
St Pinnock Viaduct
- WRENN ID
- weathered-portal-grove
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- South East Cornwall MP: Anna Gelderd (Lab)
- Country
- England
- Date first listed
- 30 April 1985
- Type
- Railway viaduct
- OS grid reference
- SX 177 646
- Coordinates
- 50.45308, -4.56836
- Source
- Historic England listing
Description
St Pinnock Viaduct is a railway viaduct built between 1854 and 1855 by Isambard Kingdom Brunel, and it was heightened in 1882. The structure features seven piers made of roughly dressed, coursed slatestone sourced from Westwood quarry, spaced approximately 60 feet apart. Each pier consists of eight buttresses with weatherings that rise to form five stages, with pointed openings in the upper four stages. The piers have a slight batter of about 1 in 100. In 1882, the piers were raised with a slightly cruder, tapering sixth stage, and iron girders replaced Brunel's original timber trestles. The viaduct originally supported a two-track railroad in 1882, which was later carried on riveted plate steel girders with steel guardrails and refuges on the north side. The viaduct measures 633 feet in length and stands 151 feet tall, making it the tallest viaduct in Cornwall. It is part of a series of viaducts built in quick succession along Brunel's Plymouth to Truro Great Western Railway line, which opened in 1859.
Local climate
St Pinnock Viaduct sits in a wetter-than-average part of the UK, with an average of 1,030 mm of rain a year. This makes it wetter than 82% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 87% of listed buildings.
It experiences an average of 16 freeze-thaw cycles a year, fewer than 84% of listed buildings. Of these, 7 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.
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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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