Railway Viaduct Railway Viaduct Including Redundant Piers, Over River Kenwyn is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 30 July 1993. Viaduct.

Railway Viaduct Railway Viaduct Including Redundant Piers, Over River Kenwyn

WRENN ID
rooted-buttress-fern
Grade
II
Local Planning Authority
Cornwall
Constituency
Truro and Falmouth MP: Jayne Kirkham (Lab)
Country
England
Date first listed
30 July 1993
Type
Viaduct
Address
Railway Viaduct Railway Viaduct Including Redundant Piers, Over River Kenwyn, St George's Road, Truro, TR1 3NR
OS grid reference
SW 820 450
Coordinates
50.26486, -5.06003
Source
Historic England listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

The railway viaduct over the River Kenwyn in Truro includes redundant piers from the original structure built in 1858, with the present viaduct completed in 1904. The redundant piers, designed by Isambard Kingdom Brunel, are made of dressed granite, while the rest of the viaduct features rock-faced granite with brick arches and a rendered parapet fascia. The structure consists of 11 spans and retains 5 surviving Brunel piers, which are rectangular in shape. The round arches are supported by tapered piers that have corbels for timber centring. There are refuges every 3 bays above the piers, and the Brunel piers are spaced 60 feet apart, originally supporting fan-shaped timber constructions.

Local climate

Railway Viaduct Railway Viaduct Including Redundant Piers, Over River Kenwyn receives an average of 890 mm of rain a year. This makes it wetter than 66% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 86% of listed buildings.

It experiences an average of 6 freeze-thaw cycles a year, fewer than 96% of listed buildings. Of these, 2 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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