Print, Photographic

One black and white photograph of the derrick boat, Merganser, and the tugboat, Whitefish Bay, of the U.S. Army Corps of Engineers. The photo shows an elevated starboard quarter view of the vessels which are underway in one of the locks at Sault Ste. Marie, Michigan. The derrick boat is carrying a load of broken concrete on its foredeck. A lock, the St. Mary's River, and the shoreline are visible in the background. A typewritten adhesive label on the verso reads "U.S. Army Corps of Engineers, St. Mary's Canal, Soo Area Office, Derrickboat Merganser, 21 June 1971."