|Commodity||Short tons||Percent of total|
|Primary nonmetal products||202,331||1.5|
|Sand, gravel, shells, clay, salt, and slag||108,789||0.8|
|Iron ore, iron, and steel waste and scrap||24,680||0.2|
|Chemicals excluding fertilizers||12,954||<0.1|
|Unknown and not elsewhere classified products2||6,622,863||48.8|
1 "Domestic" includes intrastate shipments.
2 To protect confidentiality, if three or more vessel operating companies do not carry a particular commodity from a state of origin to a state of destination, then that commodity is reclassified to "unknown and not elsewhere classified products."
SOURCE FOR DATA ON THIS PAGE: U.S. Army Corps of Engineers, Waterborne Commerce Statistics Center, State to State and Region to Region Commodity Tonnages, Public Domain database, available at http://www.iwr.usace.army.mil/ as of Oct. 30, 2001.