The St. Lawrence Seaway reported total cargo shipments in October of 4.4 million metric tons, a 9.8 percent increase over the same month last year. For the period March 22 to Oct. 31, year-to-date total cargo shipments were 29.5 million metric tons, a rise of 1.4 percent over the same period in 2011. “Shipments through the seaway of iron, steel slabs, project cargoes and domestic general cargoes jumped 9 percent over last year’s tally,” said Rebecca Spr...