 A new holding company named Hawker Industries Ltd. was then formed to acquire certain DOSCO operating units from Sidbec that were not located in Quebec, one of which was the Trenton railcar plant and forge operation.Hawker Industries Ltd. was merged into Hawker Siddeley Canada in 1979.In 1987 Hawker Siddeley Canada sought to consolidate its railcar manufacturing business, selling its Thunder Bay plant to Bombardier and offering its Hamilton and Trenton plants for sale or closure.