This is a three arch double track masonry viaduct crossing the Ballochan Linn. The overall length is 99 ft long, height 63 ft.
The viaduct is north of Auldgirth, as a result it is also known as Auldgirth Viaduct.
The engineer was John Miller.
| Portrack Viaduct|
Lower Portrack Viaduct
Closeburn Quarry Signal Box
Cample Water Viaduct
Cairn Valley Junction
Guillyhill Level Crossing
Lincluden Collegiate Church
|Location names in dark blue are on the same original line.|
An Illustrated History of Carlisle's Railways
The Glasgow & South Western Railway a History