Shillamill Viaduct is a Grade II listed building in the West Devon local planning authority area, England. First listed on 9 November 2000. Viaduct.
Shillamill Viaduct
- WRENN ID
- iron-garret-sunrise
- Grade
- II
- Local Planning Authority
- West Devon
- Constituency
- Torridge and Tavistock MP: Sir Geoffrey Cox (Con)
- Country
- England
- Date first listed
- 9 November 2000
- Type
- Viaduct
- Address
- Shillamill Viaduct, Gulworthy
- OS grid reference
- SX 465 720
- Coordinates
- 50.52836, -4.16653
- Source
- Historic England listing
Description
Shillamill Viaduct is a railway viaduct built in 1889 by the Plymouth, Devonport and South Western Junction Railway, with engineers Galbraith and Church and J.W. Szlumper for the London and South Western Railway. The structure is made of squared rock-faced granite, featuring ashlar quoins, dressings, and arch-rings. It is a double-track viaduct with twelve 50-foot arches arranged almost in a straight line, measuring about 700 feet in length and reaching a height of approximately 100 feet. The piers taper from a plinth to a cornice and support semi-circular arches. The parapet includes a band and a canopy, with a slightly projecting refuge above every second pier. The viaduct also carries a tablet marked R+P 1889, indicating the builders Relf and Pethick.
Historically, this viaduct was part of the extension from Exeter to Plymouth, providing the London and South Western Railway with a fully controlled route between London and Plymouth. The section from Lydford to Devonport was the last to be completed, opening in 1890. The line was closed and lifted west and south of Lydford in 1968, and is currently only operational from Bere Alston to Plymouth.
Local climate
Shillamill Viaduct sits in a wetter-than-average part of the UK, with an average of 1,000 mm of rain a year. This makes it wetter than 80% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 81% of listed buildings.
It experiences an average of 17 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
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- Detailed attributes — period, style, materials, features
- Flood risk assessment
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- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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