Dry bulk cargo barge
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A dry bulk cargo barge is a barge designed to carry freight such as coal, finished steel or its ingredients, grain, sand or gravel, and similar materials. Barges are constructed of steel. They have an outer hull, an internal void that is fitted with heavy struts and cross braces, and an internal cargo box. The outer hull of a barge can come in one of two configurations. A rake barge has a curved bow to provide less resistance when being pushed and is usually placed at the head of the tow. A box barge is usually placed in the center and rear of the tow and can hold more cargo.
Such barges can be equipped with covers of various types if the cargo is weather-sensitive (finished steel or grain). Generally, these covers are fabricated of fiberglass or steel. They can be lifted or rolled away for access to the barge hold, or cargo box.
In 2004, the dry bulk cargo barge fleet on the Mississippi River System (Mississippi, Gulf Intracoastal Waterway east and west, Ohio, Illinois, Missouri Rivers, etc.) stood at 5,836 open hoppers and 11,572 covered hoppers, for a total of 17,408, according the Criton Corporation. Smaller barge fleets also operate on the East (Hudson River, etc.) and West coasts (Columbia River, Sacramento River, etc) of the United States, and in numerous countries including India.
Wet products, such as vegetable oils, orange juice, liquid fuels and so forth are carried in tank barges.