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Research and Innovative Technology Administration/Bureau of Transportation Statistics
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structure
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Columbia
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Point
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Year
2013
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1. United States Dams, 2013
2013. United States. Bureau of Transportation Statistics. This map layer portrays major dams of the United States, including Puerto Rico and the U.S. Virgin Islands. The map layer was created by extracting... Research and Innovative Technology Administration/Bureau of Transportation Statistics.
2. United States Major Ports, 2013
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.