Due to the expansion of the Panama Canal (which is scheduled for completion April 2016) U.S. ports are expanding, dredging and building. The canal expansion will allow access to vessels carrying as many as 14,000 containers.
Rick Jarvis, USA Today. “U.S. ports prepare for Panama Canal expansion” www.usatoday.com 4/19/2015. http://www.usatoday.com/story/money/2015/04/19/panama-canal-expansion-us-ports/25827175/ 5/1/2015.