Added 21 Sep 2016
Updated 28 Aug 2018
The ports are politically defined by port limits or Corps projects, excluding non-Corps projects not authorized for publication. The determination for the published Principal Ports is based upon the total tonnage for the port for the particular year; therefore the top 150 list can vary from year to year.
© U.S. Army Corps of Engineers, Navigation Data Center, Waterborne Commerce Statistics Center, New Orleans, LA.
This layer is sourced from maps.bts.dot.gov.
Vector Query API, Web Feature Service (WFS)
21 Sep 2016 ago
5 Sep 2018 ago