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Group chairman Ray Macleod said a meeting attended by about 150 people in South Dunedin wanted answers to questions about the long term future which residents were still asking two years after the area was hard hit by flooding.
"We can’t wait 10 years" for effective leadership and planning, Mr Macleod emphasised.
The meeting also backed another motion that the Dunedin City Council provide an action plan "structure" by December 1, to provide "protection and support to people, homes and businesses" in the area.
Several council managers also gave updates on work being done to advance South Dunedin’s interests.
Much more work, including modelling studies, was needed to find the best ways of countering potential flooding risks, and the council could not meet a December 1 target, proposed by the action group, to produce "an initial engineering plan and response".
South Dunedin MP Clare Curran suggested a "systems" approach be developed to advance research, by sharing ideas and resources.
Dunedin GNS scientist Simon Cox spoke from a "geoscientist’s perspective" and said there was a lack of good quality deep drilling data on the ground beneath South Dunedin, unlike in Christchurch.
He urged the need for drilling to gain sound scientific data, and also raised the idea of getting everyone "in the room", enabling scientists and specialists to share information about how South Dunedin’s potential flooding challenges could be met.
Property Council New Zealand Otago chapter branch president Geoff Thomas urged the need to jointly fund proposed scientific drilling, and said good solutions could be found for South Dunedin’s challenges.