Built in 1974, by the Dravo Corporation of Neville Island, Pennsylvania (hull #6184) as the Enis M. for the Thomas Marine Company of Butler, Pennsylvania.
In 1977, the tug was acquired by the Apex Oil Company of St. Louis, Missouri. Where she was renamed as the Kathy M.
In 1995, she was acquired by the Midwest Marine Management Company of St. Louis, Missouri. Where the tug was renamed as the Midwest Pioneer.
In 1998, she was acquired by the Mid-South Towing Company of Metropolis, Illinois. Where the tug retained her name.
In 2001, the tug was acquired by Northstar Navigation Incorporated of Paducah, Kentucky. Where she was rebuilt at Kody Marine Incorporated of Harvey, Louisiana. Where she was renamed as the Teresa Beesecker.
In 2004, she was acquired by the Ozark Transportation Company of Paducah, Kentucky. Where the tug was renamed as the Capt. Russell Simpson. And, was operated by Western Rivers Boat Management Incorporated of Ash Flat, Arkansas.
In 2007, the tug was acquired by the Marquette Transportation Company of Jefferson, Louisiana. Where she was renamed as the David L. Griggs.
In 2018, the Marquette Transportation Company renamed the tug as the W. Red Harris.
Powered by two, EMD 16-645E7B diesel engines. With Falk reduction gears, at a ratio of
4.345:1. Turning two, Avdl, 108(in) by 107.76(in), stainless steel, fixed pitch propellers, mounted in kort nozzles. She is a twin screw towboat, rated at 6,140 horsepower.
Her electrical service is provided by two, John Deere 6081 generator sets. The tug's capacities are 95,932 gallons of fuel, and 1,485 gallons of lube oil.