Torrens Island and its causeway entrance are situated over the Torrens Island Bridge at the end of The Grand Trunkway in Port Adelaide; about a 30 minute drive from Adelaide’s CBD. The island is closed to the public but the small breakwater and causeway are open. Most of the island is a conservation park with the remaining area housing the power stations and some historic sites.
The island if flat and covered with mangroves, samphire and saltbush. The causeway has no vegetation. The mangroves that are accessible from the causeway and road are actually situated on Garden Island. The causeway forms a barrier between the Angas inlet on the left and the warm water outlet from the power station on the right as you face the power station.
Numerous fish species including bream, mullet, whiting and Mulloway are attracted to the warm water. In turn, predatory birds such as: herons, pelicans, terns, gulls, cormorants and egrets are found in this area. Small mangrove crabs are found under the rocks in the intertidal region. Dolphins are not uncommon and best spotted from the bridge. A population of common rats live among the rocks feeding on discarded bait but they are rarely seen during daylight hours.
The dominant vegetation seen from the causeway is the Grey Mangrove with small amounts of samphire. At low tide there are seagrass meadows visible through the fencing on the mudflats to the left facing the power station.

Mangrove leaves and fruit….note the waxy top and rough, paler underside where salt crystals accumulate.
Prior to European settlement the mangrove and samphire swamp areas were a rich hunting and gathering region for the local Kaurna people. They would have caught crabs and speared or netted fish as well as collecting shellfish.
Torrens Island was named after Robert Torrens senior who was chairman of the SA Colonisation Commission. Between 1870 and 1980 it was a quarantine station for both animals and people entering the state. During World War 1 the island was used as an internment camp for citizens of German and Austrian backgrounds. Since 1963 much of the island and surrounding water have been protected areas and part of different marine reserves. Three power stations are operating on the island: Torrens Island PS since 1963, Quarrantine PS since 2002 and finally Barker Inlet PS since 2009. All are gas powered.
Fishing from the rocky causeway in the warm water outlet is popular. There are fine views of the ships’ graveyard and its wrecks from the bridge. Tours of the old quarantine facilities can be arranged through the maritime museum in Port Adelaide. In short, quite an interesting place to visit and combine with a day at Port Adelaide.
Cheers
Baz
Additional notes
This is an easy destination to visit and is quite suitable for families and seniors.
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