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 ... Research and Innovative Technology Administration/Bureau of Transportation Statistics.
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2013. United States. Bureau of Transportation Statistics and United States. Department of Transportation. Research and Innovative Technology Administration. The National Waterway Network is a comprehensive network database of the nation's navigable waterways. The data set covers the 48 contiguous states... U.S. Army Corps of Engineers Navigation Data Center.