Built in 1918 by W.R. Menchions and Company, Limited as the Tonopah for Belmont Surf Inlet Mines Limited of Vancouver, British Columbia.

In 1926, the tug was acquired by Benjamin Gilbert of Vancouver, British Columbia. Where she retained her name.

In 1937, she was acquired by Standard Towing Company Limited of Vancouver, British Columbia. Where the tug was renamed as the Standby.

In 1946, the tug was acquired by Island Tug and Barge Limited of Vancouver, British Columbia. Where the tug was renamed as the Island Imp.

In 1960, Island Tug and Barge Limited was acquired by McAllister Towing Limited Montreal of Montreal, Quebec, and began operating as an independent subsidiary.

In 1962, the tug was retired, then sunk as part of a jetty in 1964.

In 1936, the tug was repowered with a Gardner diesel, rated at 54 horsepower. In 1945, the tug was repowered with a diesel rated at 100 horsepower. In 1946, the tug was repowered with a diesel rated at 115 horsepower.