Railroad bridge at Jay Cooke State Park, Duluth, Minnesota
View of high railroad bridge in Jay Cooke park; men at ground level ~ Photo Credit: University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
View in Duluth, Minnesota
Construction of bridge over St. Louis river; equipment; workers; children ~ Photo Credit: University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Railroad trestle at Dalles of St. Louis River, Duluth, Minnesota
Railroad trestle for Lake Superior and Mississippi or St. Paul and Duluth; may be at Dalles of St. Louis river ~ Photo Credit: University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections