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economy
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Columbia
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2011
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1. United States Ports, 2013
2011. United States. Bureau of Transportation Statistics and United States. Army. Corps of Engineers. Contains physical information on commercial facilities at the principal U.S. Coastal, Great Lakes and Inland Ports. The data consists of listings o... Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS).
2. United States Railroad Bridges, 2013
2011. United States. Bureau of Transportation Statistics. Railroad Bridges is a spatial file containing the locations of railroad bridges. The data set includes all rail bridges over the navigable and non-... Federal Railroad Administration (FRA).