You searched for: Subject Location Remove constraint Subject: Location Subject Structure Remove constraint Subject: Structure Place Washington (D.C.) Remove constraint Place: Washington (D.C.) Year 2013 Remove constraint Year: 2013
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.