Kirby Corporation operates domestic tank barges in the United States. Its Marine Transportation segment provides marine transportation service and towing vessels transporting bulk liquid product, as well as operates tank barges throughout the Mississippi River System, on the Gulf Intracoastal Waterway, and coastwise along three United States coasts, Alaska, and Hawaii. It transports petrochemicals, black oils, refined petroleum products, and agricultural chemicals by tank barges; and operates offshore dry-bulk barges and tugboat units that are involved in the offshore transportation of dry-bulk cargos in the United States coastal trade. It owns and operates 1,105 inland tank barges, approximately 266 inland towboats, 28 coastal tank barges, 24 coastal tugboats, 2 offshore dry-bulk cargo ba…