Former Railway Viaduct, Allt An Fhionn, St Fillans is a Grade B listed building in the Loch Lomond and the Trossachs National Park local planning authority area, Scotland. First listed on 4 May 2006. Viaduct.
Former Railway Viaduct, Allt An Fhionn, St Fillans
- WRENN ID
- fading-keep-fen
- Grade
- B
- Local Planning Authority
- Loch Lomond and the Trossachs National Park
- Constituency
- Perth and Kinross-shire MP: Pete Wishart (SNP)
- Country
- Scotland
- Date first listed
- 4 May 2006
- Type
- Viaduct
- OS grid reference
- NN 681 249
- Coordinates
- 56.39812, -4.13756
- Source
- Historic Environment Scotland listing
Description
The former railway viaduct at Allt An Fhionn in St Fillans was constructed between 1902 and 1904 by engineers Crouch and Hogg for the St Fillans to Lochearnhead section of the Caledonian Railway. This concrete viaduct is a notable example of early 20th century concrete engineering and holds historical significance due to its connection with the introduction of the railway to Loch Earn. It is one of three similar viaducts and bridges in St Fillans.
The viaduct spans five arches over the Allt-An-Fhionn Burn and is approximately 80 meters long, featuring a curved design. It is built from channeled mass concrete and includes five segmental arches. The parapet is characterized by a string course and a projecting cope, with shallow refuges located above each pier in the south parapet. The materials used in its construction include concrete and cast iron for the rainwater goods.
Local climate
Former Railway Viaduct, Allt An Fhionn, St Fillans sits in one of the wettest parts of the UK, with an average of 1,470 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 73% of listed buildings.
It experiences an average of 77 freeze-thaw cycles a year, more than 99% of listed buildings. Of these, 54 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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- 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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