United States Major Ports, 2013
- United States. Bureau of Transportation Statistics
- The ports are politically defined by port limits or Corps projects, excluding non-Corps projects not authorized for publication. The determination for the published Principal Ports is based upon the total tonnage for the port for the particular year; therefore the top 150 list can vary from year to year.
- Research and Innovative Technology Administration/Bureau of Transportation Statistics
- United States
- Economy, Inlandwaters, Oceans, Structure, and Transportation
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