A map of GECO running from Eglinton Avenue (at the bottom of the sketch) to present-day Hymus Road, bordered by Warden Avenue and Birchmount Road. At the Eglinton end of the plant sat the “dirty” side of the facility, where operations that did not involve explosive components were carried out. The “clean” side, where all operations involving explosives were performed, was located south of present-day Civic Road. No object that could cause static electricity or a spark, such as silk, rayon, metal, or chewing gum, could be brought onto the clean side. Courtesy of Archives of Ontario.