"The tunnel is critical to PortMiami’s future growth because it will allow port traffic to move more expeditiously to and from the interstate system, and will help reduce traffic downtown," said Mayor Carlos A Gimenez. "This project has been an engineering feat of note. But, even more significantly, the PortMiami tunnel is an example of what our port is all about — a public-private collaboration that will make our port even more dynamic tomorrow than it is today."

After traveling 4,000 feet under the bay, Harriet will now be turned around and will start the dig back towards Watson Island. The project is a public-private partnership between Miami Access Tunnel, FDOT, Miami-Dade County and the City of Miami. Construction began May 2010, and the project is expected to be completed in May 2014.