Built in 1976, by Orange Shipbuilding Incorporated of Orange, Texas (hull #205) as the Libra for the Inlet Marine Company of Anchorage, Alaska.
In 1979, the tug was sold, where she was renamed as the Duwamish.
In 1998, she was acquired by the Brusco Tug and Barge Company of Longview, Washington. Where the tug was renamed as the Primo Brusco.
On December 30th, 2002 while towing a barge off the Oregon coast near Florence, Oregon the tug sank. She was a twin screw tug, rated at 2,200 horsepower.