St. Marys Falls Canal, Mich. : Statistical report of lake commerce passing through canals at Sault St. Marie, Mich. and Ontario, during season of 1919, with supplementary report of commerce passing through Detroit River
Annual report on traffic through American and Canadian locks of St. Marys Falls Canal at Sault St. Marie, Mich. and Ontario, and through Detroit River and St. Clair Flats Canal. Reports include data on passenger traffic; freight tonnage, value, and freight rates, by commodity, country, or ship type; vessel size; lock operations and finances; and inter-lake traffic between Lake Superior and other Great Lakes.