National Geographic : 1917 Aug
Photograph byMclKenzie, Duluth PARK POINT OR MINNESOTA POINT AND DULUTH HARBOR It is hard to realize that the output of pig iron in the United States in 1916 was greater in tonnage than theworld's total output only twenty five years ago. Duluth's ore and grain shipments last year gave it a greater outgoing tonnage than any other two ports intheworld. The bridge shown in this picture is the only one of its kind in the United States. It is 365 feet long and 185 feet high, and spans theharbor entrance to "The Zenith City of the Unsalted Sea," as the mineral metropolis calls itself.