When Depot Harbour burnt to the ground and the explosives plants shut their doors, large-scale industrial endeavors in the Parry Sound area were nearly brought to an end. The shutdown of the Orenda Engines test facility at Nobel would prove to be the death knell of Parry Sound's industrial age. Includes the Depot Harbour fire, the decline of the Ottawa, Arnprior & Parry Sound Railway and Avro Arrow & Orenda Engines.