Built in 1976, by the Brent Towing Company of Greenville, Mississippi (hull #55) as the Ann Brent for the Brent Towing Company of Greenville, Mississippi.
In 1998, the tug was acquired by the Kirby Corporation of Channelview, Texas. Where she retained her name.
Powered by three, GM 8-645E5 diesel engines. With Falk reduction gears, at a ratio of 4.292:1. She is a triple screw towboat, rated at 4,350 horsepower.