Captions read: Moving outside forms - Rails to hold sheeting - hand excavation in hardpan -Backfilling - 1st foundation fill - Rock Cut - Hardpan sloughed into trench after rain - Camp 4, mile 71 - Traveller.
A photograph of the building of the Shoal Lake Aqueduct. Officially opened on September 9, 1919. Item appears to be a photographic reproduction of an image dated June 24, 1915.