Fremantle is a busy commercial cargo port on the southwestern shore of Western Australia. This sheltered, all weather port has two active harbors in operation. The Inner Harbor was opened on May 4 1897 and is located at the mouth of the Swan River adjacent to the historic City of Fremantle. The Outer Harbor, opened on January 11, 1955, is a deepwater bulk port located 20 kilometers south of the inner harbor on the Cockburn Sound. It was specifically developed to service the Kwinana industrial area that expanded rapidly in the 1960s and 70s.