|Waterborne transportation mode||Value
|Percent of total||Tons
|Percent of total|
1 Waterborne shipments are single-mode shipments not transported by any other mode. There are three basic types of vessels shown in the Commodity Flow Survey: shallow draft vessels that ply the Mississippi River, deep draft vessels that move mostly along the coasts, and a separate category of Great Lakes vessels.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, 2007 Commodity Flow Survey, preliminary data table 1, December 2008.