Credit: CA CCOQ C6-S01-C6, 838, Tri-City News, City of Coquitlam Archives

Temple Frederick Sinclair employs James Fox to assist him in the removal of rock from the quarry along Pitt River that is later to become the Gilley Quarry in Coquitlam. Sand, gravel, or crushed rock excavated from a quarry is called aggregate. Aggregate is used in construction to create stable foundations for things like roads and railroad tracks.