 The Dominion Wheel Foundry was closed in 1961 and A.V.Roe was subsequently folded into Hawker Siddeley Canada in 1962 and the Trenton railcar plant and forge were paired with other Hawker Siddeley railcar plants acquired through its subsidiary Canada Car and Foundry in Hamilton and Thunder Bay, Ontario.Hawker Siddeley sought to reduce losses at its DOSCO subsidiary acquired through the takeover of A.V.