This historic structure was comleted in 1877 to take the North East Lancashire loop line over the river Calder.
The structure is built of sandstone and consists of 10 rounded arches, each of which is 40 feet (12m) wide. Built on a slight curve as the track bed turned between Great Harwood and Read it reaches a height of 65 feet above the river.
In 1984 the viaduct was designated as a grade II listed building by English Heritage and is reputed to be in much better condition, despite years without use, than the more famous Ribble Head Viaduct.