Kirby Corp was incorporated in Nevada on January 31, 1969. The Company is a domestic tank barge operator, transporting bulk liquid products throughout the Mississippi River System, on the Gulf Intracoastal Waterway, coastwise along all three United States coasts and in Alaska and Hawaii. The Company transports petrochemicals, black oil, refined petroleum products and agricultural chemicals by tank barge. The Company also operates eight offshore barge and tug units transporting dry-bulk commodities in United States coastal trade. It conducts operations in two business segments: marine transportation and diesel engine services. The Company, through its marine transportation segment, is a provider of marine transportation services. It transports petrochemicals, black oil, refined petroleum products and agricultural chemicals by tank barge. The Company operates offshore dry-bulk barge and tugboat units engaged in the offshore transportation of dry-bulk cargoes in United States coastal trade. The segment is a provider of transportation services for its customers and, in almost all cases, does not assume ownership of the products that it transports. Its vessels operate under the USA national flag and are qualified for domestic trade under the Jones Act. The Company, through its diesel engine services segment, sells replacement parts, provides service mechanics to overhaul and repair medium-speed and high-speed diesel engines, transmissions, reduction gears, pumps and compression products, maintains facilities to rebuild component parts or entire medium-speed and high-speed diesel engines, transmissions and entire reduction gears, and manufactures and remanufactures oilfield service equipment, including pressure pumping units. The Company services the marine, power generation and land-based oil and gas operator and producer markets. The Company's marine transportation operations are subject to regulation by the USCG, federal laws, state laws and certain international conventions.