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Treffry Viaduct
Luxulyan, Cornwall
associated engineer
William Pease
date  1842
era  Victorian  |  category  Railway Viaduct  |  reference  SX055572
ICE reference number  HEW 567
The first large granite viaduct built in Cornwall. It carried a standard gauge waggon track across the Luxulyan valley and was part of a local industrial transport system devised to carry china clay to the port of Par.
The transport system was design by Joseph T. Treffry. It consisted of horse drawn waggons — except on inclines, where empty waggons were hauled using water power — and a mile of canal from Ponts Mill to Par.
The viaduct is 650ft long and 98ft high at its highest point. It consists of ten 40ft span stepped voussoir arches with projecting keystones. Across the top, a granite slab carried the railway. Beneath this an aqueduct carried the water supply to operate the waterwheel at the nearby Carmears incline, which ascends at a gradient of 1 in 10.
reference sources   CEH South

Treffry Viaduct