The loftiest of all railway viaducts in Cornwall and the finest
remaining of the works of BruneI (excluding Saltash), St Pinnock
viaduct (SX178638) is 151ft high and its iron-girder bridge of 1882
is carried on the brown-slate piers of Westwood Quarry stone,
selected by BruneI himself and built 1854-5. Half a mile to the west
is the only other similar viaduct, but not so high, the East Largin
1855-86. Along this remarkable stretch of railway line on the south
side of the Glynn Valley, there are five other notable stone viaducts,
all rebuilt from the original timbered bridges between 1877-97. They
lie between 186/135650 and 186/195647 and are named Penadlake, Clinnick, Derrycombe, West Largin and Westwood.