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Sarnia,city (1991 pop. 74,376), S Ont., Canada, on the St. Clair River, at the south end of Lake Huron and opposite Port Huron, Mich. The two cities are connected by a railroad tunnel, and there is a bridge between Port Huron and Point Edward, just N of Sarnia. The city is a port and handles a large volume of freight for transshipment from railroads to lake steamers. There are grain elevators, machinery plants, oil refineries, and chemical and synthetic-rubber industries.
a city in Canada, in Ontario Province. Population, 57,600 (1971). Sarnia is a port on the St. Clair River and Lake Huron, handling coal, timber, and grain. A railroad tunnel links the city with Port Huron in the United States. Sarnia is a major center of Canada’s petrochemical industry; oil and gas are piped from the country’s western provinces. Other industry includes the manufacture of synthetic rubber, synthetic-rubber goods, and other chemical products.