There is concern flooding could be worse in Oura, Gumly and East Wagga Wagga when the CBD and North Wagga levee banks are raised.
Councillor Donna Argus says modelling has been done on the impacts of lifting the two levees, but it is yet to be publicly released.
Councillor Argus says she is not against protecting North Wagga or the CBD but council must consult the whole community before endorsing plans to lift the levee.
"There will be water then pushed back into the Gumly community, into potentially the East Wagga industry area and certainly impacting on Oura," she said.
"These are communities upstream that if we are going to block the natural flow of a river, I think it's just going to be logic that water's going to be dammed up somewhere else."
"Give them the facts, tell them what the impacts are.
"Because levees block the natural flow of floods.
"Levees potentially push water back into other properties, can dam water into other properties, there are lots of implications that we have to consider before we just go ahead and raise levees."
Councillor Argus says raising some flood plain homes rather than lifting levee banks, could be the solution to future flooding in the city.
"In America, levees don't seen to be the option any more, they're not investing in levees," she said.
"They're investing in infrastructure to raise homes or in fact move people to higher ground.
"We're talking about getting grants from both federal and state government to raise the levee, if water is then dammed back into places like Gumly and Oura, what protection are we being offered?"
A council committee this week refused to adopt the levee upgrade recommendation, instead only approving the concept plan.
Meanwhile, there are allegations that a levee bank upstream of Wagga Wagga may have been raised illegally, prior to the March flood.
There are still dozens of vacant homes in North Wagga as a result of the flood, with many residents not expecting to return until the summer.
Councillor Argus who is on the Council's Flood Plain Committee, says a levee at Gumly was badly damaged by the March flood.
"If it is damaged and it needs to be repaired, are we in fact repairing an illegal levee?" she said.
"And look these issues have to be brought out.
"We cannot put up illegal levees because there are other people substantially affected by stopping the natural flow of a river, even in a flood event."
Councillor Argus says she has sought answers about the allegations from Wagga City staff.
"Is this a legal levee?" she said.
"Was the levee raised illegally in the past?
"And did that levee have a detrimental impact on the North Wagga, Gumly and even Oura community and the East Wagga business precinct?
"Did it impact in the last flood event.
"Now I'll be receiving that report on the 7th of August."
© ABC 2012
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