(moving) bridge in Australia, was opened in the 1940s. In 1966, the new Jervois Bridge opened, a steel bridge built a little way upstream of the original one. In the 2000s, the Port River Expressway was constructed, with the road bridge across the Port River opening on 3 August 2008, named the Tom 'Diver' Derrick Bridge. The Expressway links Hanson Road, South Road and the Salisbury Highway with the port. A railway bridge was constructed as part of the project. Today the river is crossed by Mary MacKillop opening rail bridge, the Expressway bridge, the Birkenhead Bridge, the Jervois Bridge, and a railway bridge carrying the Outer Harbor railway line. Bower Road crosses the southern extremity of the river, with West Lakes on the other side. Shipping and industrial use The banks of the river are largely industrialised and have some of Adelaide's wharves, bulk cargo and container handling facilities. Large ship transport vessels use the river's main channel. Port Adelaide is a tidal port, with several shipping berths along the length of the estuary, from the western side of the Lefevre Peninsula, along Outer Harbour, Osborne, to its innermost berths at Inner Harbour. The shipping channel has been dredged at various instances since the establishment of Port Adelaide to accommodate larger vessels. Dredging occurred most recently between June and September 2019. That dredging widened the basin and deepened the channel in order to accommodate Post-Panamax container ships and larger cruise ships to benefit the tourism industry. ASC (formerly the Australian Submarine Corporation) has its construction and maintenance facility and dock at Osborne. There is a heritage-listed former Quarantine Station on Torrens Island and a small timber jetty adjacent to it. Torrens Island Power Station and the Pelican Point Power Station, draw seawater from the Port River for cooling purposes and return it at an elevated temperature. The worst environmental disaster to occur in South Australian marine waters was the St Kilda salt fields brine spill, which killed of hectares of mangroves, samphires and other vegetation. As of 2022, elevated salinity levels in the estuary near the salt fields remain problematic. Recreational use and attractions There are some remnant mangroves in places along the estuary. One of its main attractions other than transport is the Port River dolphins, which are the only wild dolphins in the world that live within a city. The Adelaide Dolphin Sanctuary includes all of the