Its boundaries were created in March 2002 for the “long established name” and include the following shack sites - Middle River Shack Site and King George Shack Site. In 2011, a portion of Middle River was excised and added to the adjoining locality of Western River.[1]
Land use in the locality is principally for agricultural purposes with activity limited on both the coastline to the north and on land at the locality's southern boundary respectively for conservation purposes and for the protection of the drainage basin supplying the Middle River Reservoir.[9]
^For the 2011 census, the ‘State Suburb of Vivonne Bay’ consisted of the localities of Cape Borda, De Mole River, Duncan, Flinders Chase, Gosse, Karatta, Middle River, Newland, Stun’sail Boom, Vivonne Bay and Western River.