From the Maitland Mercury article by Chas Keys:
Maitland’s flood mitigation scheme has been a boon to the community for decades. But there is one problem: the protection it provides has made people complacent about flooding.
Unfortunately the flood problem appears, to those who live in the built-up areas, to have been solved.
It is not widely appreciated that the mitigation scheme was not designed to keep out of the built-up areas floods of a scale not much larger than the 1971 flood and well short of the scale of the 1955 one.
Full article available at Maitland Mercury, Feb. 26, 2015.