Built in 1989, by the Bosarge Construction Company of Bayou La Batre, Alabama (hull #BC-01) as the Nancy D. Spanier for the Spanier Marine Corporation of Harvey, Louisiana.
In 1991, the tug was acquired by John W. Stone Oil Distributor LLC. of Gretna, Louisiana. Where she was renamed as the Bunker King.
Powered by two, GM 16V-149 diesel engines. With Twin Disc reduction gears, at a ratio of 7:1. She is a twin screw towboat, rated at 2,700 horsepower.