Pictured as: the Rosario (Dunlap Towing Co) Photo by: Kyle Stubbs

Built in 1977 by Marine Iron Works Incorporated at Tacoma, Washington (hull #R732) as the James T. Quigg for the Allman-Hubble Tugboat Company of Aberdeen, Washington, a subsidiary of Quigg Brothers Incorporated of Aberdeen, Washington.

In 1987, Quigg Brothers Incorporated partnered with Harley Franco to form Olympic Tug and Barge Incorporated of Seattle, Washington, transferring the tug to the new company. Where she retained her name.

In 2004 she was acquired by the Dunlap Towing Company of Everett, Washington. Where the tug was renamed as the Rosario.

She is a twin screw tug, rated at 1,750 horsepower.