Mitchell River and the Silt Jetties
Again; the river (and silt and sand it carries) will find the easiest path to the lake/sea. Once they drop the sand and silt and there is a build-up of sediment, they will change course in the direction of least resistance. As illustrated below:
River Deltas - Google images
The Bairnsdale Silt Jetties extend 9 klms out into Jones/Eagle Point Bays with minimal fanning out on either side. There would also seem an attempt to connect the Mitchell River with Mullet Bay to the east of the Silt Jetties.
Maybe the Mitchell River was once a canal connecting Bairnsdale and Eagle Point with the eastern shore of the Lake King/Gippsland Lakes. Certainly it is difficult to believe that the Mitchell River south of Bairnsdale and the Silt Jetties are natural geological formations – and if they are not natural then shouldn’t we be trying to find out ‘who’ or ‘what’ formed them?