CHALK RIVER

village, Renfrew county, southeastern Ontario, Canada. The village lies along the Chalk River near its mouth on the Ottawa River, 90 miles (145 km) northwest of Ottawa. It was a small frontier settlement until after World War II, when it became the site of Canada's first nuclear reactor and of the Chalk River Nuclear Laboratory, one of several research and development centres operated by Atomic Energy of Canada, Limited, concerned with the peaceful uses of atomic energy. The Trans-Canada Highway and the main line of the Canadian Pacific Railway serve the village and Deep River, a residential community for persons working at the laboratory. Inc. 1954. Pop. (1991) 874.