2012. United States. Bureau of Transportation Statistics and Institute for Water Resources (U.S.). Navigation Data Center. This point shapefile depicts physical information on commercial facilities at the principal United States coastal, Great Lakes and inland ports. Th... United States. Bureau of Transportation Statistics.
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2013. Waterborne Commerce Statistics Center (U.S.) and United States. Bureau of Transportation Statisticsf. This point shapefile depicts ports politically defined by port limits or USACE projects, excluding non-USACE projects not authorized for publicatio... United States. Bureau of Transportation Statistics.
2013. Institute for Water Resources (U.S.). Navigation Data Center. This point shapefile contains the locations of waterways locks in the United States. The Navigation Data Center had several objectives in developin... United States. Bureau of Transportation Statistics.