The Duchray Bridge, which carries the Loch Katrine aqueduct across Duchray Water, also known as the "Infant Forth" because it is the head-stream of that river. This Thomas Annan photograph is part of a series taken in 1876 and shows the 60-feet span of the bridge across the river, with the pipeline borne on cast-iron girders.
Reference: D-WA 22/1/14
Reproduced with the permission of Glasgow City Council, Libraries Information and Learning
aqueducts, bridges, cast-iron girders, Duchray Bridge, Duchray Water, Loch Katrine water scheme, pipelines, public water supply