According to the Chamber of Marine Commerce, closing the St. Lawrence Seaway in December to accommodate higher water outflow at the Moses-Saunders dam would cost the Canadian and U.S. economies $193 million/per week. The measure, designed to ease flooding in the region, would impact farmers’ grain exports, manufacturing plant operations and disrupting deliveries of fuel, construction materials and road salt for winter safety to cites throughout the region. The $193 million per week figure is based on Business Revenue Impacts of cargo transiting the St. Lawrence Seaway, and excludes cargo carried by Canadian-flag ships through the Welland Canal.
