Brisbane City Council is seeking community feedback on five possible designs for a new Riverwalk which was severely damaged in the January flood.

Large sections of the controversial floating river structure, which linked the CBD to New Farm, were washed away at the height of the flood.

Options include repairing the floating walkway at a cost of $75 million, fixing it for $67 million or building a $54 million retaining wall which pedestrians could walk on instead.

The restoration of the original floating Riverwalk is estimated to cost the council $66.6 million in maintenance costs over the next century, while maintenance on the retaining wall with moorings on the outside would cost $2 million over the same period.

Any form of a fixed boardwalk would need to be funded by the federal and state governments because the council can only use its funds to repair the riverwalk.