Built in 1970, by Master Marine Incorporated of Bayou LaBatre, Alabama (hull #112) as the Gnots V. for Gnots Incorporated of Destrehan, Louisiana.
In 1985, the tug was acquired by Jefferson Barracks Marine Service Incorporated of St. Louis, Missouri. Where she was renamed as the Karen Michelle.
In 2011, she was acquired by CLM Towing Incorporated of Mauriceville, Texas. Where the tug was renamed as the Lenny J.
In 2017, the tug was acquired by Savage Marine Services Incorporated of Salt Lake City, Utah. Where she retained her name.
In 2020, Savage Marine Services Incorporated was acquired by the Kirby Corporation of Channelview, Texas. Where the tug retained her name.
Powered by two, GM 12V-149 diesel engines. With Twin Disc reduction gears, at a ratio of 7:1. Turning two, stainless steel, fixed pitch propellers. She is a twin screw towboat, rated at 1,400 horsepower.