SS Clifton, originally Samuel Mather, was a whaleback lake freighter built in 1892 for service on the Great Lakes. She was 308 foot (94 m) long, 30 foot (9.1 m) beam, and 24 foot (7.3 m) depth, and had a 3,500 ton capacity. The self-propelled barge was built by the American Steel Barge Company in West Superior, Wisconsin. Her builders used a design well-suited to carry iron ore, her intended trade. The new vessel was christened Samuel Mather, after a cofounder of Pickands Mather and Company, which at the time was the second largest fleet on the Great Lakes.