http://www.panynj.gov/bridges-tunnel...ect-about.html
Today, because the bridge is only 151 feet above the water, larger container vessels often cannot pass under it to reach our marine terminals - Port Newark and Elizabeth-Port Authority Marine Terminal in New Jersey and Howland Hook Marine Terminal in Staten Island. Shippers who rely on our ports for access to a regional transportation network are forced to use other smaller, less-efficient and less environmentally friendly ships to bring goods into our region.