During World War II, the port was primarily used for shipbuilding, employing more than 90,000 people. In 1959, Matson Navigation Company's Hawaiian Merchant delivered 20 containers to the port, beginning the port's shift to containerization. The opening of the Vincent Thomas Bridge in 1963 greatly improved access to Terminal Island and allowed increased traffic and further expansion of the port. In 1985, the port handled one million containers in a year for the first time. During the 2002 West Coast port labor lockout, the port had a large backlog of ships waiting to be unloaded at any given time. In 2000, the Pier 400 Dredging and Landfill Program, the largest such project in America, was completed. By 2013, more than half a million containers were moving through the Port every month.
