Both ships suffered similar accidents with lift bridges on the Welland Canal.
Hanna in 1899, a 430-foot (130 m), 4,661-long-ton (4,736 t) steamer built by Globe Iron Works that could carry approximately 7,000 long tons (7,100 t).
After a decade moving primarily coal and ore, Interlake Steamship modernized its operations with four new ships, and sold the Hydrus and 11 other ships to Patterson Steamship Co. of Fort William.
The vessel's name comes from the city of Winnipeg, where the owner's head offices were based, combined with the fleet suffix doc, referring to the Dominion Of Canada.
Its first transit through the Welland came in 1937, where it made frequent grain and coal runs until it was retired and sold for scrap in 1967.