Built in 1940, by Equitable Equipment Incorporated of Madisonville, Louisiana (hull #108) as the B.T. DeBardeleben for the DeBardeleben Marine Corporation of Wilmington, Delaware.

In 1952, the tug was acquired by the BiFrost Company Incorporated of Quincy, Massachusetts. Where she was renamed as the Lilian.

In 1968, she was acquired by the McAllister Brothers Towing Company of New York, New York. Where the tug was renamed as the Peter B. McAllister.

In 1998, the tug was scuttled.

She was a single screw tug, rated at 1,800 horsepower