This image is from an undated postcard published by Gallagher’s Studio of Photography in Duluth.
Photo description from the back of the card:
The French Ship Racroi enters the Duluth-Superior Harbor through the famous Aerial Lift Bridge. Also shown is the Streamliner, an excursion boat. A tug helps guide the 13,000-ton bulk cargo carrier Racroi, which is 555 feet long with a 69-foot boom and a 27-foot draft.