Built in 2009, by Intracoastal Iron Works Incorporated of Bourg, Louisiana (hull #138) as the William Cenac for the Cenac Towing Company Incorporated of Houma, Louisiana.

In 2009, she was acquired by Enterprise Marine Services Incorporated of San Antonio, Texas. Where the tug was renamed as the William.

Powered by two, Cummins QSK38-M diesel engines. With Reintjes reduction gears, at a ratio of 5.96:1. She is a twin screw towboat, rated at 2,400 horsepower.