What century were the Leiper Canal and Duluth Ship Canal built?
Leiper Canal Early in the 19th century, the Leiper Canal built in 1828-29 during the middle of the American canal age ran about 3 mi along Crum Creek in Delaware County to its mouth in Eastern Pennsylvania's Delaware Valley carrying its owners quarried products to docks on the Delaware River tidewater until 1852.
Co-operative Central Exchange Co-operative Central Exchange (CCE, Keskusosuuskunta), founded in 1917 and known from the spring of 1931 as Central Co-operative Wholesale, was the coordinating entity of a network of consumers' co-operatives located primarily in the states of the American Upper Midwest. Based in the Great Lakes port city of Superior, Wisconsin, located adjacent to the Finnish enclave of Duluth, Minnesota, the Co-operative Central Exchange produced an array of its own branded products under the "Red Star" and "Co-operators' Best" brand names and did annual volume well in excess of $1 million from 1928 on.