 In 1955, the Canso Causeway opened, closing the railcar ferry service and resulting in a decline in Point Tupper's economy as railway facilities were removed or abandoned.However the causeway, which completely closed the Strait of Canso's water flow (except for the Canso Canal) also created a sheltered ice-free deepwater port to which Point Tupper's waterfront uniquely suited for the increasing number of modern deep draught cargo ships entering service following World War II.In the early 1960s, the government of Robert Stanfield created Industrial Estates Limited as a provincial Crown corporation.