Built in 2011, by Main Iron Works Incorporated of Houma, Louisiana (hull #430) as the J.J. Cenac for the Cenac Towing Company Incorporated of Houma, Louisiana.
In 2019, the Cenac Towing Company was acquired by the Kirby Corporation of Channelview, Texas. Where the tug retained her name.
Powered by two, Cummins QSK-50 diesel engines. With Twin Disc reduction gears, at a ratio of 6:1. Turning two, stainless steel, fixed pitch propellers. She is a twin screw tug, rated at 3,200 horsepower.
Her electrical service is provided by two, 65kW generator sets. The tug's capacities are 60,000 gallons of fuel, 1,600 gallons of lube oil, and 15,000 gallons of water.