Postcard from U.S. Steel’s Machine Shop and Power House Paul Lundgren 5 years ago U.S. Steel’s Duluth Works plant in Morgan Park had more than 50 buildings when production began in 1915. This undated postcard highlights the machine shop and power house. Recommended Links:Postcard from American Steel and Wire WorksPostcards from Universal Atlas Cement CompanyMorgan Park: Remembering Our PastFunding agreement in place for St. Louis River cleanup