Torrens Island Sanctuary which overlays the entire island. Torrens Island Torrens Island is an island in the Australian state of South Australia located in the Port River Estuary between the Port River and Barker Inlet, about northwest of the state capital of Adelaide. Since European settlement of Adelaide in 1836, it has been used for a number of purposes. Being uninhabited, an island, adjacent to Port Adelaide, and near Outer Harbor, Torrens Island was initially used as the site of a Quarantine Station for new arrivals (by sea) to South Australia. One example of its use was during the so-called "Boonah crisis".
River Torrens inundated to The Parade, Adelaide to Pirie and Rundle Streets, and many areas west of the city were left in a shallow lake. The river ran deep over the weir near Thorndon Park Reservoir, over the Torrens Lake Weir and over the Morphett Street Bridge. The Underdale (or Holbrooks) Bridge was destroyed, the Torrens Lake weir's bridge damaged, and the Felixstow Bridge over the Fourth Creek washed away. The first European sighting of the river was in November 1836 by an exploration party comprising Lieutenant W.G. Field, John Morphett and George Strickland Kingston. The river was named "The Yatala" by