Through its subsidiary Kirby Inland Marine, Kirby Corporation delivers bulk liquid products throughout the Mississippi River System and the Gulf Intracoastal Waterway. Kirby's service includes the transporting of petrochemicals, pressurized products, refined petroleum products, black oil products and agricultural chemical products by inland tank barge. The corporation also overhauls and serves large diesel engines and sells diesel engine parts through its subsidiary Kirby Engine Systems. Kirby Engine Systems offers services to distinct segments of the market through its three subsidiaries, Marine Systems, Engine Systems and Rail Systems. The diesel engines are used in marine, power generation, industrial and railroad applications. Located in Houston, Kirby Inland Marine can be traced back to 1948.